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IODP Bremen Core Repository

International core repository at the University of Bremen

The Bremen Core Repository - BCR, for International Ocean Discovery Program (IODP), Integrated Ocean Drilling Program (IODP), Ocean Drilling Program (ODP), and Deep Sea Drilling Project (DSDP) cores from the Atlantic Ocean, Mediterranean, Black and Baltic Seas and Arctic Ocean is operated at University of Bremen within the framework of the German participation in IODP. It is one of three IODP repositories (beside Gulf Coast Repository (GCR) in College Station, TX, and Kochi Core Center (KCC), Japan) and was established in the summer of 1994. The IODP-BCR has a 1100 sqm refrigerated storage area with a movable rack system and state-of-the-art laboratory and office space, and is located in the MARUM building on the campus of Bremen University.

BCR presently contains about 185 km of deep-sea cores from 104 expeditions in around 250,000 boxes (also see reports), which are sampled and analysed by national and international working groups. Around 200 scientists visit the repository annually, sometimes working on the cores in week-long sampling meetings (video). As many as 50,000 samples per year are removed from the cores by guests and by the repository staff. The repository is an important contact point for scientists from all over the world (more than 4,000 visitors so far) and therefore significantly contributes to the exchange and transfer of marine science knowledge in Bremen, leading to international co-operations and scientific interactions.

Land-based cores from ODP Legs 150X and 174AX are stored at the Rutgers/New Jersey Geological Survey (RU/NJGS) core repository in Piscataway, NJ.



IODP BCR Reefer (V Diekamp at MARUM)
IODP BCR Reefer in MARUM I building



ECORD Training Course 2019 at BCR

Requesting samples from deep-sea cores

Scientists may request samples from any International Ocean Discovery Program (IODP), Integrated Ocean Drilling Program (IODP), Ocean Drilling Program (ODP) or Deep Sea Drilling Project (DSDP) leg/expedition by filling out a sample request in the Sample and Data Request System, SaDR  (for all cores retrieved by all vessels/platforms).

To identify where samples have already been removed please search the Web Interface for BCR Curatorial Data (or here for samples taken (in all repositories) before the start of the IODP).

Samples can be taken by repository staff, or scientists can visit the repository to take their own samples. A variety of sampling tools and procedures are available.

Microbiology Sample Material Availability

One of the scientific goals of IODP is to research the deep biosphere and the subseafloor ocean. IODP has deep-frozen microbiological samples from the subseafloor available for interested researchers and will continue to collect and preserve geomicrobiology samples for future research. The list of available samples at BCR you will find here:

Upcoming events at the BCR

Sample Party for Exp. 401 Mediterranean-Atlantic Gateway Exchange, 1 - 7 July 2024


ECORD Summer School 2024, 2 - 13 September 2024. Apply now! Call open, deadline 31 May 2024.


Sample Party for Exp. 403 Eastern Fram Strait Paleo-Archiv, in 2025 (stay tuned)


next ECORD Training Course - stay tuned!






Exp. 381 Science Team
V. Diekamp MARUM & IODP
Physical Properties class at ECORD Summer School 2022
Physical Properties class at ECORD Summer School 2022, U. Röhl, MARUM and IODP
During one of the visual core description classes of ECORD Summer School 2022

Contacts for the Bremen Core Repository

Founding Director BCR: Prof. Dr. Dr. h.c. Gerold Wefer


Head of the 'Core repository' group at MARUM, ESO Curation & Laboratory Manager, IODP Curator:

Dr. Ursula Röhl


+49 421 218-65560


+49 421 218-9865560



MARUM I 1230


Repository Superintendent, BCR:

Dr. Holger Kuhlmann


+49 421 218-65566


+49 421 218-9865566



MARUM 1, 0230


Assistant Curation & Lab Manager:

Dr. Patrizia Geprägs


+49 421 218-65673


+49 421 218-9865673



MARUM I 0220


Curatorial Specialists, Logistics & Procurement Experts, BCR:


Curation of Interstitial Water samples BCR:

Dr. Luzie Schnieders


+49 421 218-65562


+49 421 218-9865562



MARUM I, 0210


Data Management BCR:

Dr. Vera Barbara Bender


+49 421 218-65951


+49 421 218-9865951



MARUM II, 0020

Oliver Blaszczyk


+49 421 218-65950



MARUM (Pavillon), 0140

How to find us / Accomodation in Bremen

Campus map

Tram #no. 6 from airport to university (35 min.)
Tram #no. 6 from main station to university (15 min.)