Oman Sampling Party onboard drilling vessel Chikyu

In the next two months the cores taken during Phase II of the Oman Drilling Project will be described and analyzed onboard Chikyu. The scientists work in groups - the igneous, alteration, structural, geochemistry, physical...

Category: Highlights


Marco Bohnhoff

Marco Bohnhoff is Professor for Experimental and Borehole Seismology and head of GFZ-section 4.2 'Geomechanics and Rheology'. He brings ICDP experience through his role as PI in various ICDP projects (GONAF, Koyna, STAR). 

Category: Highlights


ICDP Executive Committee Meeting in China

The Executive Committee discusses about 12 Full Proposals, seven Workshop Proposals and one Pre-Proposal submitted by January 15, 2018. Workshop Proposals will be decided on by the EC, while Full Proposals will be decided on by...

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Oman Drilling

The final core of OmanDP Phase 2

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Oman Drilling

first core from site BA4A

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ICDP Image Video

The ICDP Image Video is now online

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ICDP Post-Operations International Workshop

This post-operation workshop in Pune, India highlights the achivements of the Koyna Pilot Hole drilling and discusses opportunities for future deep drilling at Koyna, a world-class site for studying reservoir-triggered...

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New milestone in Songliao Drilling

SK-II completed its stage IV (216mm diameter) last November at the depth of 5922.58m and after a long winter shutdown, started its final stage V (152mm diameter) on 4th May, 2017. As at the hole bottom, the temperature rises to...

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Hydrofrac tests in the Koyna pilot hole

The tests were carried out by a team comprising experts from Mesy-Solexperts and scientists from the Borehole Geophysics Research Laboratory (BGRL). The tests, made in the granitic basement, are the first of it's kind in the...

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EGU 2017

EGU 2018 will take place April 8-13 in Vienna - we are looking forward seeing you there!

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Important Transition at ICDP

Left: Brian Horsfield. Right: Axel Liebscher

As Chair of the ICDP Assembly of Governors, I have the bittersweet task of announcing the retirement of Brian Horsfield, who has ably served as the Chair of ICDP’s Executive Committee for the past six years. During Brian’s...

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SAG Meeting in Bern

Group Photo Further evaluation at the Executive Committee meeting in June 5-6.

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East Africa

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Drilling successfully completed with 225 m of drilled core

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India renewed membership

MoU between University of Earth Sciences, India and GFZ Potsdam signed on August 30.

Category: Highlights


20 Years of ICDP

The Union Symposium Speakers

Deep Geofluids: the bringers of change

Category: Highlights

Heat and Mass Transport

Volcanism, Tectonics, and Heat Flow in the Wake of the Yellowstone Mantle Plume

The YSRP volcanic province overlies a thermal anomaly that extends deep into the mantle and represents one of the highest heat flow provinces in North America, and an area with the highest calculated geothermal gradients. The goals of Project Hotspot were (1) to understand the volcanic and tectonic effects of plume-continent interaction by sampling a complete volcanic section on the hotspot track, (2) to evaluate the thermal and mass transfer involved, and (3) to obtain a record of the Pliocene-Pleistocene climate transition in the western SRP province. An additional goal was to evaluate innovative exploration techniques for geothermal energy associated with the hotspot.

Project Hotspot addressed these goals by drilling three deep (1.9 km) coreholes: (1) Kimama, sited to sample a complete section through the basalts, (2) Kimberly, sited to sample the underlying rhyolites, and (3) Mountain Home, sited to sample Pliocene lake sediments and their underlying basalts. All three sites were cored with >99% recovery producing 5.3 Km of core. Preliminary age dates for Kimama (1912m), from Ar-Ar and detrital zircons, indicate a linear accumulation rate of ~300m/Ma, with a bottom hole age of ~6.2 Ma. Highly evolved (Fe,K-rich) basalts are intercalated with the dominant olivine tholeiites at several depths, with clastic sediment intercalated near the bottom of the hole. Thermal gradients are isothermal at ~16ºC to ~965 m, then become conductive with gradient of 75ºC/Km. The Kimberly hole (1957m) contains two sections of basalt and sediment, with 400m of rhyolite ash flow above (>6.26 Ma) and 1530m of ash flows below. The deepest ash flow is over 1300m thick, and must represent a ponded caldera fill. Thermal gradients are near isothermal at 55ºC to total depth. The Mountain Home hole consists of 215m of basalt overlying 730m of lacustrine sediments, which rest on basalt and basaltic sands. The thermal gradient in this hole is 75ºC/Km throughout. An artesian geothermal aquifer was encountered at 1745m (T=140ºC).

Our results document significant, continuous magmatic flux long after the lithosphere has moved away from the hotspot. Data gathering is ongoing by the Hotspot Science Team.