Study Areas

Six research cruises (2024-26) across full range of MOR spreading rates

The rate at which ridges spread is a primary physical control on their composition and structure.  We will explore the relationships between spreading rate and glacial cycles by carrying out cruises across a factor of seven change in spreading rate, from 2.2cm/yr on the mid-Atlantic ridge to 15 cm/yr on the southern East Pacific Rise.  The sea-going program plans to make use of both the German and US research fleets.

In order to recover detailed time series of MOR chemistry and hydrothermal activity and variations in bathymetry and crustal thickness, ship cruises are planned to three MOR segments to cover the entire range of spreading rates on Earth, the primary control on MOR processes. Each area has low sedimentation rates (~1cm/ka), so that up to 1.5Ma old basement can be reached with gravity coring.
The areas selected for detailed stdudies are 1) Mid-Atlantic Ridge (MARR97 segment) at 33.5°N with a slow full spreading rate (~2cm/a), 2) Cleft Segment of the Juan de Fuca Ridge at ~45°N with intermediate full spreading rate (~6cm/a), and 3) South East Pacific Rise (SEPR) at ~15°S with fast full spreading rate (~15cm/a).

Cruises

Slow-Spreading (2cm/yr) - Reykjanes Ridge (North Atlantic)

       Maria S. Merian (MSM119) - July 8th, St. John's, CA- August 12th 2024, St. John's, CA

       Meteor (M213) - September 4th, St. John's, CA- October 9th 2025, Las Palmas, Gran Canaria

Fast-Spreading (15cm/yr) - Southern East Pacific Rise

       SONNE (SO314) - Aug 14th, Papetee, Tahiti - Oct 4th 2025, Antofagasta, Chile

Intermediate-spreading (6cm/yr) - Cleft Segment, Juan de Fuca Ridge

       US Sally Ride (SR2510) - Newport Oregon April 28th, US - Newport Oregon, US, May 12th 2025

       SONNE (SO321-2 legs) - August 7th, Vancouver, CA- September 12th 2026, Vancouver, CA

       US Sally Ride (2026) - tba

 


Slow-spreading (2 cm/yr) Reykjanes Ridge

MSM 119

Chief Scientist: Prof. Achim Kopf (MARUM)

Research Vessel: Maria S. Merian - MSM 119

Date: July 8th, St. John's, Canada - August 12th 2023, St. John's, Canada

M213

Chief Scientist: Prof. Achim Kopf (MARUM)

Research Vessel: Meteor M213

Date: September 4th, St. John's, Canada - October 9th 2025, Las Palmas, Gran Canaria Spain

Fast-spreading (15 cm/yr) Southern EPR

SO314

Chief Scientist: Prof. Martin Frank (GEOMAR)

Research Vessel: SONNE (SO314)

Date: Aug 14th, Papetee, Tahiti - Oct 4th 2025, Antofagasta, Chile

 

Intermediate-spreading (6 cm/yr) Cleft Segment, Juan de Fuca Ridge

SR2510

Chief Scientist: Prof. Charles Langmuir (Harvard)

Research Vessel: Sally Ride

Date: Newport Oregon April 28th - Newport Oregon May 12th 2025

SO321

Chief Scientist: Prof. Heidrun Kopp (GEOMAR)

Research Vessel: SONNE (SO321)

Date: 07.08.2026 (Vancouver) - 12.09.2026 (Vancouver), 2 Legs with 4 day stop in Astoria

SR (tba)

Chief Scientist: Prof. Charles Langmuir (Harvard)

Research Vessel: tba

Date: in 2026

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