GEOMAR  Wartho, Jo-Anne

Jo-Anne Wartho

kein

Scientist, Topic 3
Research Division 4: Dynamics of the Ocean Floor
Resear Unit: Magmatic and hydrothermal Systems

Office:
Phone: +49 431 600 2122
Email: jwartho(at)geomar.de

Address:
Wischhofstraße 1-3; 24148 Kiel; GERMANY

Education and Career

  • Since 2017 Senior Research Scientist and 40Ar-39Ar Laboratory Manager, GEOMAR Helmholtz Centre for Ocean Research Kiel.
  • 2014-2017 Senior Research Scientist, GEOMAR Helmholtz Centre for Ocean Research Kiel.
  • 2006-2014 Associate Research Professional and 40Ar-39Ar Laboratory Manager, Arizona State University, USA.
  • 2005-2006 Curtin University Special Research Fellow and Manager of the Western Australian Argon Isotope Facility, Curtin University, Australia.
  • 2003-200 Senior Research Fellow and Manager of the Western Australian Argon Isotope Facility, Curtin University, Australia.
  • 2000-2003 Research Fellow and Manager of the Western Australian Argon Isotope Facility, Curtin University, Australia.
  • 1997-2000 Leverhulme Trust grant post-doctoral fellowship, Open University, UK. 
  • 1994-1997 National Environmental Research Council (NERC) post-doctoral grant fellowship, Open University, UK.
  • 1992-1994 North Atlantic Treaty Organisation (NATO) Fellowship, University of California, Los Angeles, USA.
  • 1992 Post-doctoral research fellowship, University of Leeds, UK. 
  • 1992 PhD, University of Leeds, UK. ‘Argon isotope systematics and mineralogy of metamorphic hornblendes from the Karakoram’.
  • 1988-1991 PhD student, University of Leeds, UK.
  • 1987-1988 Research Assistant, Birkbeck College, University College London, UK, with Badley, Ashton and Associates Ltd.
  • 1987 BSc (Honours) degree majoring in Geology, City of London Polytechnic, UK.

Scientific Interests

  • 40Ar-39Ar and (U-Th)/He geochronology on terrestrial (crust and mantle) and lunar rocks.
  • Developing the (U-Th)/He method for dating extraterrestrial impact craters.
  • Experimental noble gas diffusion and solubility studies in minerals and melts.

Research funding and awards

  • 2017-2018 Co-Proponent on a “Portal deutsche Forschungsschiffe” grant proposal: “BATHYCHEM - The effect of intraplate volcanism on the geochemical evolution of oceanic lithosphere: Details mapping and sampling of the Bathymetrists Seamounts and adjacent fracture zones” (Maria S. Merian: December 2017 – February 2018).
  • 2011-2015 Principal-Investigator on a US $307,000 National Science Foundation (NSF) grant: “The next step in unravelling the Earth’s impact history: (U-Th)/He dating of impact structures”.
  • 2011 Mineralogical Society of Great Britain and Ireland Senior Bursary Award (US $600).
  • 2008 Mineralogical Society of Great Britain and Ireland Senior Bursary Award (US $700).
  • 2007-2010 Co-Investigator on a Norwegian Research Foundation grant: “The crustal architecture and exhumation history of the Neoproterozoic/early Palaeozoic East African-Antarctic Orogen, in northern Mozambique”.
  • 2007-2011 Chief-Investigator on a US $34.6 million Australian Government National Collaborative Research Infrastructure Strategy grant: ‘Structure and Evolution of the Australian Continent’.
  • 2006-2007 Chief-Investigator on an Australian Antarctic Division grant: “Enigmatic Orogeny during the dispersal of Rodinia: Deciphering the Record of Tectonic Reworking in the Vestfold Hills, Antarctica”.
  • 2006-2010 Chief-Investigator on a US $1.53 million Western Australian State Government Centres of Excellence in Science and Innovation Program grant.
  • 2005-2009 Curtin University Special Research Fellowship award (US $141,000): “Determining the ages and rates of deformation in the Earth’s crust”.
  • 2004-2007 Chief-Investigator on an Australian Research Council Large Discovery grant (US $126,000): “Understanding the Sibao Orogenic Belt in South China:  A part of the Rodinian Supercontinent assembly adjacent to Australia”.
  • 2002 Chief-Investigator on a Curtin University Small Linkage Grant (US $8,800): “40Ar-39Ar laser dating of vacuum encapsulated clay samples – A new development in geochronology”.
  • 2002 Chief-Investigator on an Australian Commonwealth Scientific and Research Organisation (CSIRO) Linkage Grant (US $14,900): “40Ar-39Ar laser dating of vacuum encapsulated clay samples – A new development in geochronology”.
  • 1997-2000 Co-Investigator on a Leverhulme Trust grant (US $202,000): “Crystal/melt noble gas partitioning: Insights into early Earth degassing”.
  • 1998-2000 Chief-Investigator on a National Environmental Research Council (NERC) Small Grant (US $21,600): “Determining the fundamental parameters of argon in feldspars and feldspathoids”.
  • 1998 Mineralogical Society of Great Britain and Ireland Senior Bursary Award (US $700).
  • 1997-1998 Chief-Investigator on an Open University Research and Development award (US $52,600); to install forescatter imaging and Electron Backscattered Diffraction (EBSD) detectors and software onto the Open University scanning electron microscope.
  • 1992-1994 NATO Research Fellowship award to study at the University of California, Los Angeles.
  • 1992 – 1994 Chief-Investigator of a NSF grant (US $15,000); for experimental work with NATO Fellowship, at the University of California, Los Angeles.
  • 1991  Mineralogical Society of Great Britain and Ireland (US $700) Student Bursary Award.

Membership and committees

  • Since 2020 Member of the Advisory Board for the Journal of Petrology (Oxford University Press).
  • 2005-2006 Member of the Earth Composition and Evolution Working Group for an AuScope ‘Structure and Evolution of the Australian Continent’ research grant (US $34.6 million) from the Australian Government National Collaborative Research Infrastructure Strategy.
  • 2005-2006 Council Committee Member of the Western Australian Division of the Geological Society of Australia.
  • Since 1989 Fellow of the Mineralogical Society of Great Britain.
  • Since 2002 Member of the Geochemical Society.
  • 1986-2019 Fellow of the Geological Society of London.
  • 2011-2015 Member of the Meteoritical Society.
  • 1992-2012 Member of the American Geophysical Union.

Publications

Jump to: Articles in a Scientific Journal - peer-reviewed | Book chapters | Presentations | Conference posters | Reports - other reports
Number of items: 85.

Articles in a Scientific Journal - peer-reviewed

[thumbnail of 1-s2.0-S1342937X24002090-main.pdf] [thumbnail of Supplementary data]

Dürkefälden, A., Hauff, F. , Hoernle, K. , Portnyagin, M. , Wartho, J. A. , Garbe-Schönberg, D., Gurenko, A., van den Bogaard, P., Kipf, A. and Gutjahr, M. (2024) Geochemical and temporal evolution of Indian MORB mantle revealed by the Investigator Ridge in the NE Indian Ocean. Open Access Gondwana Research, 134 . pp. 347-364. DOI 10.1016/j.gr.2024.07.016.

Kwasnitschka, T. , Hansteen, T. H. , Ramalho, R. S., Devey, C. W. , Klügel, A., Samrock, L. K. and Wartho, J. A. (2024) Geomorphology and Age Constraints of Seamounts in the Cabo Verde Archipelago, and Their Relationship to Island Ages and Geodynamic Evolution. Open Access Geochemistry, Geophysics, Geosystems, 25 (3). e2023GC011071. DOI 10.1029/2023GC011071.

Samrock, L. , Hansteen, T. H. , Dullo, W. C. and Wartho, J. A. (2022) Internal igneous growth, doming and rapid erosion of a mature ocean island: the Miocene evolution of Maio (Cabo Verde). Open Access International Journal of Earth Sciences, 111 . pp. 1129-1148. DOI 10.1007/s00531-022-02160-x.

[thumbnail of Pre-proof] [thumbnail of Ukstins etal.pdf]

Ukstins, I., Wartho, J. A. , Cabrol, N. A., Grin, E. A., van Soest, M. C., Biren, M. B., Hodges, K. V. and Chong, G. (2022) An (U-Th)/He age for the small Monturaqui impact structure, Chile. Open Access Quaternary Geochronology, 67 . Art.Nr. 101217. DOI 10.1016/j.quageo.2021.101217.

[thumbnail of Final version + Supplements]

Homrighausen, S., Hoernle, K. , Wartho, J. A. , Hauff, F. and Werner, R. (2021) Do the 85°E Ridge and Conrad Rise form a hotspot track crossing the Indian Ocean?. Lithos, 398-399 . Art.Nr. 106234. DOI 10.1016/j.lithos.2021.106234.

Di Chiara, A., Tauxe, L., Staudigel, H., Florindo, F., Protti, M., Yu, Y., Wartho, J. A. , van den Bogaard, P. and Hoernle, K. (2021) Earth’s magnetic field strength and the Cretaceous Normal Superchron: New data from Costa Rica. Open Access Geochemistry, Geophysics, Geosystems, 22 (4). e2020GC009605. DOI 10.1029/2020GC009605.

Cavosie, A. J., Biren, M. B., Hodges, K. V., Wartho, J. A. , Horton, J. W. and Koeberl, C. (2021) Dendritic reidite from the Chesapeake Bay impact horizon, Ocean Drilling Program Site 1073 (offshore northeastern USA): A fingerprint of distal ejecta?. Open Access Geology, 49 (2). pp. 201-205. DOI 10.1130/G47860.1.

[thumbnail of ter12468-sup-0005-suppinfo.docx] [thumbnail of ter.12468.pdf]

Long, X., Geldmacher, J. , Hoernle, K. , Hauff, F. , Wartho, J. A. and Garbe-Schönberg, D. (2020) Origin of isolated seamounts in the Canary Basin (East Atlantic): The role of plume material in the origin of seamounts not associated with hotspot tracks. Open Access Terra Nova, 32 (5). pp. 390-398. DOI 10.1111/ter.12468.

Homrighausen, S., Hoernle, K. , Zhou, H. , Geldmacher, J. , Wartho, J. A. , Hauff, F. , Werner, R., Jung, S. and Morgan, J. P. (2020) Paired EMI-HIMU hotspots in the South Atlantic-Starting plume heads trigger compositionally distinct secondary plumes?. Open Access Science Advances, 6 (28). eaba0282. DOI 10.1126/sciadv.aba0282.

Samrock, L. K. , Wartho, J. A. and Hansteen, T. H. (2019) 40Ar-39Ar geochronology of the active phonolitic Cadamosto Seamount, Cape Verde. Lithos, 344-345 . pp. 464-481. DOI 10.1016/j.lithos.2019.07.003.

Biren, M. B. , Wartho, J. A. , Van Soest, M. C. , Hodges, K. V. , Cathey, H. , Glass, B. P., Koeberl, C. , Horton, J. W. and Hale, W. (2019) (U-Th)/He zircon dating of Chesapeake Bay distal impact ejecta from ODP site 1073. Open Access Meteoritics & Planetary Science, 54 (8). pp. 1840-1852. DOI 10.1111/maps.13316.

Timm, C. , de Ronde, C. E. J., Hoernle, K. , Cousens, B., Wartho, J. A. , Tontini, F. C., Wysoczanski, R., Hauff, F. and Handler, M. (2019) New Age and Geochemical Data from the Southern Colville and Kermadec Ridges, SW Pacific: Insights into the recent geological history and petrogenesis of the Proto-Kermadec (Vitiaz) Arc. Open Access Gondwana Research, 72 . pp. 169-193. DOI 10.1016/j.gr.2019.02.008.

[thumbnail of Mercer_et_al-2019-Meteoritics_&_Planetary_Science.pdf]

Mercer, C. M. , Hodges, K. V., Jolliff, B. L., Van Soest, M. C., Wartho, J. A. and Weirich, J. R. (2019) Exploring the variability of argon loss in Apollo 17 impact melt rock 77135 using high-spatial resolution 40 Ar/39 Ar geochronology. Meteoritics & Planetary Science, 54 (4). pp. 721-739. DOI 10.1111/maps.13240.

Dürkefälden, A., Hoernle, K. , Hauff, F. , Wartho, J. A. , van den Bogaard, P. and Werner, R. (2019) Age and geochemistry of the Beata Ridge: Primary formation during the main phase (~89 Ma) of the Caribbean large Igneous Province. Open Access Lithos, 328-329 . pp. 69-87. DOI 10.1016/j.lithos.2018.12.021.

[thumbnail of Long et al_Lithos_2019_Print.pdf] [thumbnail of Long et al Lithos_2019_Appendix.zip]

Long, X., Geldmacher, J. , Hoernle, K. A. , Hauff, F. , Wartho, J. A. , Garbe-Schönberg, D. and Grevemeyer, I. (2019) Age and origin of Researcher Ridge and an explanation for the 14° N anomaly on the Mid-Atlantic Ridge by plume-ridge interaction. Lithos, 326-327 . pp. 540-555. DOI 10.1016/j.lithos.2019.01.005.

Homrighausen, S., Hoernle, K. , Hauff, F. , Wartho, J. A. , van den Bogaard, P. and Garbe-Schönberg, D. (2019) New age and geochemical data from the Walvis Ridge: The temporal and spatial diversity of South Atlantic intraplate volcanism and its possible origin. Open Access Geochimica et Cosmochimica Acta, 245 . pp. 16-34. DOI 10.1016/j.gca.2018.09.002.

[thumbnail of Accepted Manuscript] [thumbnail of mmc3.docx]

Kaulfuss, U., Lee, D. E., Wartho, J. A. , Bowie, E., Lindqvist, J. K., Conran, J. G., Bannister, J. M., Mildenhall, D. C., Kennedy, E. M. and Gorman, A. R. (2018) Geology and palaeontology of the Hindon Maar Complex: A Miocene terrestrial fossil Lagerstätte in southern New Zealand. Open Access Palaeogeography, Palaeoclimatology, Palaeoecology, 500 . pp. 52-68. DOI 10.1016/j.palaeo.2018.03.022.

[thumbnail of Accepted manuscript] [thumbnail of Homrighausen.pdf]

Homrighausen, S., Hoernle, K. , Hauff, F. , Geldmacher, J. , Wartho, J. A. , van den Bogaard, P. and Garbe-Schönberg, D. (2018) Global distribution of the HIMU end member: Formation through Archean plume-lid tectonics. Open Access Earth-Science Reviews, 182 . pp. 85-101. DOI 10.1016/j.earscirev.2018.04.009.

Homrighausen, S., Hoernle, K. , Geldmacher, J. , Wartho, J. A. , Hauff, F. , Portnyagin, M. , Werner, R., van den Bogaard, P. and Garbe-Schönberg, D. (2018) Unexpected HIMU-type late-stage volcanism on the Walvis Ridge. Open Access Earth and Planetary Science Letters, 492 . pp. 251-263. DOI 10.1016/j.epsl.2018.03.049.

[thumbnail of Fox.pdf] [thumbnail of Fox_Suppl.pdf]

Fox, B. R. S., D'Andrea, W. J., Wilson, G. S., Lee, D. E. and Wartho, J. A. (2017) Interaction of polar and tropical influences in the mid-latitudes of the Southern Hemisphere during the Mi-1 deglaciation. Global and Planetary Change, 155 . pp. 109-120. DOI 10.1016/j.gloplacha.2017.06.008.

Schultz, M. H., Hodges, K. V., Ehlers, T. A., van Soest, M. and Wartho, J. A. (2017) Thermochronologic constraints on the slip history of the South Tibetan detachment system in the Everest region, southern Tibet. Earth and Planetary Science Letters, 459 . pp. 105-117. DOI 10.1016/j.epsl.2016.11.022.

[thumbnail of Biren.pdf] [thumbnail of Biren_Suppl.pdf]

Biren, M. B., van Soest, M. C., Wartho, J. A. , Hodges, K. V. and Spray, J. G. (2016) Diachroneity of the Clearwater West and Clearwater East impact structures indicated by the (U–Th)/He dating method. Earth and Planetary Science Letters, 453 . pp. 56-66. DOI 10.1016/j.epsl.2016.07.053.

[thumbnail of Borneman.pdf]

Bornemann, N. L., Hodges, K. V., Wartho, J. A. , van Soest, M. C., Bohon, W., Cronk, S. S. and Ahmad, T. (2015) Age and structure of the Shyok Suture in the Ladakh region of Northwestern India: Implications for slip on the Karakoram Fault System. Open Access Tectonics, 34 (10). pp. 2011-2033. DOI 10.1002/2015TC003933.

[thumbnail of Adams et.al.pdf]

Adams, B. A., Hodges, K. V., Whipple, K. X., Ehlers, T. A., van Soest, M. C. and Wartho, J. A. (2015) Constraints on the tectonic and landscape evolution of the Bhutan Himalaya from thermochronometry. Open Access Tectonics, 34 (6). pp. 1329-1347. DOI 10.1002/2015TC003853.

[thumbnail of Mercer et al 2015 sci advances.pdf]

Mercer, C. M., Young, K. E., Weirich, J. R., Hodges, K. V., Jolliff, B. L., Wartho, J. A. and van Soest, M. C. (2015) Refining lunar impact chronology through high spatial resolution 40Ar/39Ar dating of impact melts. Open Access Science Advances, 1 (1). e1400050. DOI 10.1126/sciadv.1400050.

[thumbnail of 2015 fox wartho wilson lee nelson kaulfuss Geopchemistry, Geophysics, Geosystems.pdf]

Fox, B. R. S., Wartho, J. A. , Wilson, G. S., Lee, D. E., Nelson, F. E. and Kaulfuss, U. (2015) Long-term evolution of an Oligocene/Miocene maar lake from Otago, New Zealand. Geochemistry, Geophysics, Geosystems, 16 (1). pp. 59-76. DOI 10.1002/2014GC005534.

[thumbnail of Tapia et.al.pdf]

Tapia, C. A., Wilson, G. S., Ishman, S. E., Wilke, H. G., Wartho, J. A. , Winter, D. and Martínez-Pardo, R. (2015) An integrated sequence stratigraphic and chronostratigraphic analysis of the Pliocene, Tiburon Basin succession, Mejillones Peninsula, Chile. Global and Planetary Change, 131 . pp. 124-147. DOI 10.1016/j.gloplacha.2015.05.005.

[thumbnail of Biren.pdf] [thumbnail of 1-s2.0-S0009254114001569-mmc1.pdf]

Biren, M. B., van Soest, M. C., Wartho, J. A. and Spray, J. G. (2014) (U-Th)/He Dating of Uplift-Induced Cooling in a Complex Terrestrial Impact Structure: The Manicouagan Example. Chemical Geology, 377 . pp. 56-71. DOI 10.1016/j.chemgeo.2014.03.013.

[thumbnail of Variable shortening rates in the eastern Himalayan thrust belt,.pdf]

Long, S. P., McQuarrie, N., Tobgay, T., Coutand, I., Cooper, F. J., Reiners, P. W., Wartho, J. A. and Hodges, K. V. (2012) Variable shortening rates in the eastern Himalayan thrust belt, Bhutan: Insights from multiple thermochronologic and geochronologic data sets tied to kinematic reconstructions. Tectonics, 31 (5). TC5004. DOI 10.1029/2012TC003155.

[thumbnail of Postcollisional High-Grade Metamo.pdf]

Ueda, K., Jacobs, J., Thomas, R. J., Kosler, J., Horstwood, M. S. A., Wartho, J. A. , Jourdan, F., Emmel, B. and Matola, R. (2012) Postcollisional high-grade metamorphism, orogenic collapse, and differential cooling of the East African Orogen of Northeast Mozambique. Journal of Geology, 120 (5). pp. 507-530. DOI 10.1086/666876.

[thumbnail of An (U-Th)⁄He age for the shallow-marine Wetumpka.pdf]

Wartho, J. A. , Van Soest, M. C., King, D. T. and Petruny, L. W. (2012) An (U-Th)/He age for the shallow-marine Wetumpka impact structure, Alabama, USA. Meteoritics & Planetary Science, 47 (8). pp. 1243-1255. DOI 10.1111/j.1945-5100.2012.01381.x.

[thumbnail of He dating of terrestrial impact.pdf]

van Soest, M. C., Hodges, K. V., Wartho, J. A. , Biren, M. B., Monteleone, B. D., Ramezani, J., Spray, J. G. and Thompson, L. M. (2011) (U-Th)/He dating of terrestrial impact structures: The Manicouagan example. Geochemistry, Geophysics, Geosystems, 12 (5). QOAA16. DOI 10.1029/2010GC003465.

[thumbnail of Magmatic and metamorphic events during the early Paleozoic.pdf]

Li, Z. X., Li, X. H., Wartho, J. A. , Clark, C., Li, W. X., Zhang, C. L. and Bao, C. (2010) Magmatic and metamorphic events during the early Paleozoic Wuyi-Yunkai orogeny, southeastern South China: New age constraints and pressure-temperature conditions. Geological Society of America Bulletin, 122 (5-6). pp. 772-793. DOI 10.1130/B30021.1.


Emmel, B., Jöns, N., Kroner, A., Jacobs, J., Wartho, J. A. , Schenk, V., Razakamanana, T. and Austegard, A. (2008) From closure of the Mozambique Ocean to Gondwana breakup: New evidence from geochronological data of the Vohibory terrane, southwest Madagascar. Journal of Geology, 116 (1). pp. 21-38. DOI 10.1086/524121.

[thumbnail of Spaggiari.pdf]

Spaggiari, C. V., Wartho, J. A. and Wilde, S. A. (2008) Proterozoic deformation in the northwest of the Archean Yilgarn Craton, Western Australia. Precambrian Research, 162 . pp. 354-384. DOI 10.1016/j.precamres.2007.10.004.

[thumbnail of Early history of the eastern Sibao Orogen.pdf]

Li, Z. X., Wartho, J. A. , Occhipinti, S., Zhang, C. L., Li, X. H., Wang, J. and Bao, C. (2007) Early history of the eastern Sibao Orogen (South China) during the assembly of Rodinia: New mica 40Ar/39Ar dating and SHRIMP U–Pb detrital zircon provenance constraints. Precambrian Research, 159 (1-2). pp. 79-94. DOI 10.1016/j.precamres.2007.05.003.

[thumbnail of Downes.pdf]

Downes, P. J., Wartho, J. A. and Griffin, B. J. (2006) Magmatic Evolution and Ascent History of the Aries Micaceous Kimberlite, Central Kimberley Basin, Western Australia: Evidence from Zoned Phlogopite Phenocrysts, and UV Laser 40Ar/39Ar Analysis of Phlogopite-Biotite. Journal of Petrology, 47 (9). pp. 1751-1783. DOI 10.1093/petrology/egl026.

[thumbnail of Pirajno and Wartho 2005 AJES long-1.pdf]

Pirajno, F. and Wartho, J. A. (2005) Hydrothermal processes associated with meteorite impact structures: evidence from three Australian examples and implications for economic resources. Australian Journal of Earth Sciences, 52 (4-5). pp. 587-605. DOI 10.1080/08120090500170468.

[thumbnail of A chronology of foreland deformation.pdf]

Quinn, D., Meere, P. A. and Wartho, J. A. (2005) A chronology of foreland deformation: ultra-violet laser 40Ar/39Ar dating of syn/late-orogenic intrusions from the Variscides of southwest Ireland. Journal of Structural Geology, 27 (8). pp. 1413-1425. DOI 10.1016/j.jsg.2005.02.003.


Wartho, J. A. , Kelley, S. P. and Elphick, S. C. (2005) Estimates of Ar diffusion and solubility in leucite and nepheline: Electron microprobe imaging of Ar distribution in a mineral. American Mineralogist, 90 (5-6). pp. 954-962. DOI 10.2138/am.2005.1320.

[thumbnail of Time Markers for the Evolution.pdf]

Willner, A. P., Thomson, S. N., Kröner, A., Wartho, J. A. , Wijbrans, J. and Hervé, F. (2005) Time Markers for the Evolution and Exhumation History of a Late Palaeozoic Paired Metamorphic Belt in North-Central Chile (34°-35°30'S). Journal of Petrology, 46 (9). pp. 1835-1858. DOI 10.1093/petrology/egi036.

[thumbnail of Ar dating of detrital muscovite.pdf]

Haines, P. W., Turner, S. P., Kelley, S. P., Wartho, J. A. and Sherlock, S. C. (2004) 40Ar–39Ar dating of detrital muscovite in provenance investigations: a case study from the Adelaide Rift Complex, South Australia. Earth and Planetary Science Letters, 227 (3-4). pp. 297-311. DOI 10.1016/j.epsl.2004.08.020.

[thumbnail of Ar ages of single detrital white mica grains.pdf]

Willner, A. P., Wartho, J. A. , Kramm, U. and Puchkov, V. N. (2004) Laser 40Ar39Ar ages of single detrital white mica grains related to the exhumation of Neoproterozoic and Late Devonian high pressure rocks in the Southern Urals (Russia). Geological Magazine, 141 (2). pp. 161-172. DOI 10.1017/S0016756803008628.

[thumbnail of The zero charge partitioning.pdf]

Brooker, R. A., Du, Z., Blundy, J. D., Kelley, S. P., Allan, N. L., Wood, B. J., Chamorro, E. M., Wartho, J. A. and Purton, J. A. (2003) The ‘zero charge’ partitioning behaviour of noble gases during mantle melting. Nature, 423 (6941). pp. 738-741. DOI 10.1038/nature01708.

[thumbnail of Origin and Migration.pdf]

Müller, W., Friche, H., Halliday, A. N., McColloch, M. T. and Wartho, J. A. (2003) Origin and Migration of the Alpine Iceman. Science, 302 (5646). pp. 862-866. DOI 10.1126/science.1089837.

[thumbnail of Ar and K partitioning between clinopyroxene.pdf]

Chamorro, E. M., Brooker, R. A., Wartho, J. A. , Wood, B. J., Kelley, S. P. and Blundy, J. D. (2002) Ar and K partitioning between clinopyroxene and silicate melt to 8 GPa. Geochimica et Cosmochimica Acta, 66 (3). pp. 507-519. DOI 10.1016/S0016-7037(01)00784-0.

[thumbnail of Garnet Granulite Xenoliths.pdf]

Kempton, P. D., Downes, H., Neymark, L., Wartho, J. A. , Sharkov, E. V. and Zartman, R. (2001) Garnet Granulite Xenoliths from the Northern Baltic Shield--the Underplated Lower Crust of a Palaeoproterozoic Large Igneous Province?. Journal of Petrology, 42 (4). pp. 731-763. DOI 10.1093/petrology/42.4.731.

[thumbnail of Magma flow regimes in sills deduced from Ar isotope.pdf]

Wartho, J. A. , Kelley, S. P. and Blake, S. (2001) Magma flow regimes in sills deduced from Ar isotope systematics of host rocks. Journal of Geophysical Research: Solid Earth, 106 (B3). pp. 4017-4036. DOI 10.1029/2000JB900327.

[thumbnail of Rapid Kimberlite Ascent.pdf]

Kelley, S. P. and Wartho, J. A. (2000) Rapid Kimberlite Ascent and the Significance of Ar-Ar Ages in Xenolith Phlogopites. Science, 289 (5479). pp. 609-611. DOI 10.1126/science.289.5479.609.

[thumbnail of Direct measurement of Ar diffusion profiles.pdf]

Wartho, J. A. , Kelley, S. P., Brooker, R. A., Carroll, M. R., Villa, I. M. and Lee, M. R. (1999) Direct measurement of Ar diffusion profiles in a gem-quality Madagascar K-feldspar using the ultra-violet laser ablation microprobe (UVLAMP). Earth and Planetary Science Letters, 170 (1-2). pp. 141-153. DOI 10.1016/S0012-821X(99)00088-6.

[thumbnail of Preliminary UVLAMP determinations of argon.pdf]

Brooker, R. A., Wartho, J. A. , Carroll, M. R., Kelley, S. P. and Draper, D. S. (1998) Preliminary UVLAMP determinations of argon partition coefficients for olivine and clinopyroxene grown from silicate melts. Chemical Geology, 147 (1-2). pp. 185-200. DOI 10.1016/S0009-2541(97)00181-2.

[thumbnail of Wartho.pdf]

Wartho, J. A. , Rex, D. C. and Guise, P. G. (1996) Excess argon in amphiboles linked to greenschist facies alteration in the Kamila Amphibolite Belt, Kohistan island arc system, northern Pakistan: insights from 40Ar/39Ar step-heating and acid leaching experiments. Geological Magazine, 133 (05). pp. 595-609. DOI 10.1017/S0016756800007871.

[thumbnail of Apparent argon diffusive loss.pdf]

Wartho, J. A. (1995) Apparent argon diffusive loss 40Ar/39Ar age spectra in amphiboles. Earth and Planetary Science Letters, 134 (3-4). pp. 393-407. DOI 10.1016/0012-821X(95)00113-Q.

[thumbnail of Photo-emission.pdf]

Wartho, J. A. (1995) Photo-Emission Electron Microscopy (PEEM) Heating Investigations of a Natural Amphibole Sample. Open Access Mineralogical Magazine, 59 (394). pp. 121-127. DOI 10.1180/minmag.1995.59.394.12.

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Rex, D. C., Guise, P. G. and Wartho, J. A. (1993) Disturbed 40Ar/39Ar spectra from hornblendes: Thermal loss or contamination?. Chemical Geology, 103 (1-4). pp. 271-281. DOI 10.1016/0009-2541(93)90306-4.

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Wartho, J. A. , Dodson, M. H., Rex, D. C. and Guise, P. G. (1991) Mechanisms of Ar release from Himalayan metamorphic hornblende. American Mineralogist, 76 . pp. 1446-1448.

Book chapters

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Wartho, J. A. , Kelley, S. P. and Elphick, S. C. (2014) Ar diffusion and solubility measurements in plagioclases using the ultra-violet laser depth-profiling technique. In: Advances in 40 Ar/39 Ar dating : from archaeology to planetary sciences. , ed. by Jourdan, F.. Geological Society Special Publications, 378 . Geological Society, London, pp. 137-154. ISBN 978-1-86239-360-8 DOI 10.1144/SP378.13.

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Daszinnies, M. C., Jacobs, J., Wartho, J. A. and Grantham, G. H. (2009) Post Pan-African thermo-tectonic evolution of the north Mozambican basement and its implication for the Gondwana rifting. Inferences from 40Ar/39Ar hornblende, biotite and titanite fission-track dating. In: Thermochronological methods : from palaeotempertature constraints to landscape evolution models. , ed. by Lisker, F.. Geological Society Special Publications, 324 . Geological Society, London, pp. 261-286. ISBN 978-1-86239-285-4 DOI 10.1144/SP324.18.


Wartho, J. A. and Kelley, S. P. (2003) 40Ar/39Ar ages in mantle xenolith phlogopites: determining the ages of multiple lithospheric mantle events and diatreme ascent rates in southern Africa and Malaita, Solomon Islands. In: Geochronology: Linking the Isotopic Record with Petrology and Textures. , ed. by Vance, D.. Geological Society Special Publications, 220 . Geological Society , London, pp. 231-248. ISBN 1-86239-146-7 DOI 10.1144/GSL.SP.2003.220.01.14.

Presentations


Hoernle, K. , Homrighausen, S., Zhou, H. , Wartho, J. A. , Hauff, F. , Werner, R. and Geldmacher, J. (2020) A large-scale geochemical zonation of the African LLSVP recorded by mantle plumes?. [Talk] In: AGU Fall Meeting 2020. , 01.-17.12.2020, Online, San Francisco, USA .

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Homrighausen, S., Hoernle, K. , Zhou, H. , Geldmacher, J. , Wartho, J. A. , Hauff, F. , Werner, R., Jung, S. and Morgan, J. P. (2020) Compositionally distinct overlying hotspot tracks in the South Atlantic: Do primary mantle plumes trigger secondary upwellings?. Open Access [Talk] In: Goldschmidt 2020 Virtual Conference. , 21.06.-26.06.2020, - .

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Biren, M. B., Wartho, J. A. , van Soest, C., Hodges, K., Cathey, H. E., Glass, B. P., Koeberl, C., Horton, J. W. J. and Hale, W. (2019) (U-Th)/He dating of shocked zircons from Chesapeake Bay distal impact ejecta at ODP site 1073. Open Access [Talk] In: GSA Annual Meeting 2019. , 22.-25.09.2019, Phoenix, Arizona, USA .

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Wartho, J. A. , Samrock, L. and Hansteen, T. (2019) Antecrysts – angels or devils in 40Ar/39Ar geochronology? Examples from Cape Verde seamounts. Open Access [Talk] In: GeoMünster 2019. , 22.-25.09.2019, Münster, Germany .


Hoernle, K. A. , Hauff, F. , Homrighausen, S., Rohde, J., Dürkefälden, A., Werner, R., Geldmacher, J. , Portnyagin, M. V. , Garbe-Schönberg, C. D., van den Bogaard, P. and Wartho, J. A. (2018) New Developments in Understanding the Origin of South Atlantic Intraplate Volcanism (Tristan-Gough-Walvis, Discovery Shona volcanic tracks). [Invited talk] In: GeoBonn 2018. , 02.09.-06.09.2018, Bonn, Germany .

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Hoernle, K. , Höfig, T., Bezard, R., Portnyagin, M. , Hauff, F. , Wartho, J. A. , Pfänder, J., Jicha, B. R., Krebs, N., Werner, R., Yogodzinski, G. and Müller, D. (2018) New Insights into the Formation and Evelution of the Aleutian Arc. Open Access [Invited talk] In: AGU Fall Meeting 2018. , 10.-14.12.2018, Washington, D.C., USA .


Hoernle, K. , Homrighausen, S., Hauff, F. , Werner, R., Portnyagin, M. , Geldmacher, J. , Garbe-Schönberg, D., van den Bogaard, P. and Wartho, J. A. (2018) Geochemistry of South Atlantic Hotspots: Intimate Association of EMI & HIMU End Members. [Talk] In: Goldschmidt Conference 2018. , 12.08.-17.08.2018, Boston, USA .

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Homrighausen, S., Hoernle, K. , Geldmacher, J. , Hauff, F. , Portnyagin, M. , Werner, R., Schaefer, B. F., Wartho, J. A. and Garbe-Schönberg, D. (2018) Temporal and geochemical evolution of the Afanasy Nikitin -85° E Ridge, Central Indian Ocean, R/V Sonne cruise SO258/1 . Open Access [Talk] In: AGU Fall Meeting 2018. , 10.-14.12.2018, Washington, D.C., USA .

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Samrock, L. , Hansteen, T. H. and Wartho, J. A. (2017) 40Ar-39Ar age clustering in the active phonolitic Cadamosto Seamount (Cape Verdes): Indications for periodic magmatic activity. Open Access [Talk] In: AGU Fall Meeting 2017. , 11.12. - 15.12.2017, New Orleans, USA .


Schultz, M., Hodges, K. V., Ehlers, T. A., Van Soest, M. C., Wartho, J. A. and McDonald, C. (2016) A systematic thermochronologic transect across the Himalayan rain shadow is consistent with coupling of precipitation patterns and Pliocene-recent exhumation . [Talk] In: GSA Annual Meeting 2016. , 25.-28.09.2016, Denver, Colorado, USA .

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Biren, M. B., Wartho, J. A. , van Soest, M. C., Hodges, K. V. and Spray, J. G. (2015) Diachroneity of the Clearwater west and Clearwater east impact structures supported by (U-Th)/He dating. [Talk] In: 46. Lunar and Planetary Science Conference (2015). , 16.-20.03.2015, The Woodlands, Texas, USA ; p. 2690 .


Mercer, C., Hodges, K., Jolliff, B., van Soest, M., Wartho, J. A. and Weirich, J. (2015) Spatially resolved, correlated variations in apparent 40Ar/39Ar ages and Ca/K ratios in Apollo 17 impact melt breccia 77135.. [Talk] In: Meteoritical Society Workshop “The first 1 Ga of impact records”. , 07.2015, Berkeley, CA, USA .


Schultz, M., Hogdes, K., van Soest, M. and Wartho, J. A. (2015) Exploring the Variability of Late Cenozoic Exhumation Rates across the Himalayan Rain Shadow. [Talk] In: Geological Society of America Annual Meeting 2015. , 01.-04.11.2015, Baltimore, Maryland, USA .


Wartho, J. A. , Li, Z. X., Occhipinti, S. A. and Reddy, S. (2008) 40Ar/39Ar UV laser dating, EBSD and EMP analysis of 1040-940 Ma metamorphic/deformation/cooling events recorded in Sibao Orogen white micas, South China. [Talk] In: Goldschmidt Conference 2008. , 13.-18.07.2008, Vancouver, Canada .

Conference posters

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Geldmacher, J. , Long, X., Hoernle, K. , Hauff, F. , Wartho, J. A. and Garbe-Schönberg, D. (2020) Origin of isolated seamounts in the Canary Basin (East Atlantic): The role of plume material in the origin of seamounts not associated with hotspot tracks. Open Access [Poster] In: Goldschmidt 2020 Virtual Conference. , 21.06.-26.06.2020, - .

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Höfig, T. W., Portnyagin, M. , Hoernle, K. , Hauff, F. , Jicha, B. R., Wartho, J. A. , van den Bogaard, P. and Garbe-Schönberg, D. (2020) More than 40 million years of oblique subduction recorded in the magmatism of the westernmost Aleutian arc. Open Access [Poster] In: Goldschmidt 2020 Virtual Conference. , 21.06.-26.06.2020, - .

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Homrighausen, S., Hoernle, K. , Zhou, H., Wartho, J. A. , Hauff, F. , Werner, R. and Garbe-Schönberg, D. (2019) Double Age progressive hotspot tracks – Primary EM I-type and secondary HIMU mantle plumes in the South Atlantic. Open Access [Poster] In: GeoMünster 2019. , 22.-25.09.2019, Münster, Germany .

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Long, X., Geldmacher, J. , Hoernle, K. , Hauff, F. , Wartho, J. A. and Garbe-Schönberg, D. (2019) Demenitskoy Smt. (East Atlantic) and the importance of small, isolated intraplate seamounts in the ocean basins. Open Access [Poster] In: GeoMünster 2019. , 22.-25.09.2019, Münster, Germany .

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Geldmacher, J. , Long, X., Hoernle, K. , Hauff, F. , Wartho, J. A. , Garbe-Schönberg, D. and Grevemeyer, I. (2018) Origin and age of the Researcher Ridge Seamount Chain (Central Atlantic). Open Access [Poster] In: AGU Fall Meeting 2018. , 10.-14.12.2018, Washington, D.C., USA .


Long, X., Geldmacher, J. , Hoernle, K. A. , Hauff, F. , Wartho, J. A. , Garbe-Schönberg, D. and Grevemeyer, I. (2018) Age and origin of Researcher Ridge in Central Atlantic. [Poster] In: GeoBonn 2018. , 02.09.-06.09.2018, Bonn, Germany .


Samrock, L. , Wartho, J. A. , Hansteen, T. H. and Dullo, C. (2018) Crumbling Away: 40Ar-39Ar Dating of a Large Miocene Mass Wasting Period on Maio Island (Cape Verde). [Poster] In: AGU Fall Meeting 2018. , 10.-14.12.2018, Washington, D.C., USA .

[thumbnail of Biren et al LPSC 2015 final Chesapeake Bay.pdf]

Biren, M. B., Wartho, J. A. , van Soest, M. C., Hodges, K. V., Glass, B. P., Koeberl, C., Horton, J. W. J. and Hale , W. (2015) The (U-Th)/He isotope system applied to the dating of distal ejecta from the Chesapeake Bay impact structure. [Poster] In: 46. Lunar and Planetary Science Conference (2015). , 16.-20.03.2015, The Woodlands, Texas, USA ; p. 2722 .


Mercer, C., Hodges, K., Jolliff, B., van Soest, M., Wartho, J. A. and Weirich, J. (2015) High Spatial Resolution 40Ar/39Ar Geochronology of Impact Melt Breccias from Apollo 17 Boulders at Stations 2, 6, and 7. [Poster] In: AGU Fall Meeting 2015. , 14.-18.12.2015, San Francisco, USA .


Schultz, M., Hodges, K., Jolliff, B., van Soest, M. and Wartho, J. A. (2015) Exploring the Variability of Late Cenozoic Exhumation Rates across the Himalayan Rain Shadow. [Poster] In: AGU Fall Meeting 2015. , 14.-18.12.2015, San Francisco, USA .

Reports - other reports

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Hoernle, K. , Werner, R., Jolis, E. M., Hauff, F. , Wartho, J. A. , Jacques, G., Timm, C. and Gohl, K. (2018) SO246 Chatham Rise - Chatham Rise (Neuseeland): Kompressions-, Extensions- und Abbruchmechanismen eines submarinen Kontinentalplateaus ; Abschlussbericht, 03G0246B, Berichtszeitraum: 01. November 2015 - 30. April 2018 . Open Access . GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, 16 pp. DOI 10.2314/GBV:1043713336.

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Hoernle, K. , Werner, R., Hauff, F. , Jacques, G., Wartho, J. A. and Uenzelmann-Neben, G. (2016) SO-232 [SO232] SLIP : Suspected Large Igneous Province - Handelt es sich beim Mozambique Rücken um eine Large Igneous Province? : Abschlussbericht, 03G0232B, Berichtszeitraum: 01. Januar 2014 bis 30. Juni 2016. Open Access . GEOMAR Helmholtz-Zentrum für Ozeanforschung, Kiel, Germany, 13 pp. DOI 10.2314/GBV:884503836.

This list was generated on Wed Apr 30 01:22:01 2025 CEST.