Highlights

14.10.2017

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...

Category: Highlights



17.05.2017

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...

Category: Highlights



01.05.2017

EGU 2017

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

Category: Highlights



27.04.2017

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...

Category: Highlights



27.03.2017

SAG Meeting in Bern

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

Category: Highlights



20.11.2016

DeepChalla

East Africa

Category: Highlights



03.11.2016

DeepCHALLA

Drilling successfully completed with 225 m of drilled core

Category: Highlights



30.08.2016

India renewed membership

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

Category: Highlights



04.01.2016

20 Years of ICDP

The Union Symposium Speakers

Deep Geofluids: the bringers of change

Category: Highlights



20.05.2015

Inauguration of the ICDP-GONAF downhole observatory

More than 40 Scientists from seven countries came together for the inauguration of the ICDP GONAF downhole observatory (Geophysical Observatory at the North Anatolian Fault). The workshop was held in combination with the...

Category: Highlights



11.10.2013

Heat and Mass Transport

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

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.