Transcript Erste Ergebnisse zur Untersuchung von Methanemissionen im Lena

Deep Life Workshop, Potsdam, 2014
PIER-ICDP
Probing of Intra-continental magmatic activity:
drilling the Eger Rift
T. Dahm1, P. Hrubcová2, T. Fischer3, J. Horálek2, M. Korn4, S. Buske5, D. Wagner1
1GFZ
German Research Center for Geosciences, Germany
2Institute of Geophysics, Czech Republic
3Charles University Prague, Czech Republic
4Inst. of Geophysics and Geology, University Leipzig, Germany
5Inst. of Geophysics and Geoinformatics, TU Freiberg, Germany
ecotours-russia.com
Photo: Torre Jorgenson
Deep biosphere in NW Bohemia/Vogtland: A unique field lab
intracontinental nonvolcanic rift with
complex geology /
tectonics
3 Variscan (Paleozoic to
Mesozoic) tectonic units,
re-activated (Tertiary),
quatern. volcanoes
Intersection of Eger Rift
and different major faults
(seismic hazard?)
Earthquake swarms,
diffuse CO2 degassing
from mantle,
thermal/mineral springs
Dahm et al., 2013, Scientific Drilling
Objectives of PIER-ICDP
The ICDP Eger Rift project aims to develop the most modern, comprehensive
observatory worldwide for the study of earthquake swarms and CO2 degassing
in order to reach a new level of high frequency, near-source, and multiparameter observation of earthquake swarms and related phenomena
What are the physical and chemical processes leading to earthquakes
and volcanic eruptions?
How does fluid transfer through the crust work?
How influence geological processes the deep biosphere and the
evolution of early life in deep subsurface environments?
Interdisciplinary research: Structural geology, geophysics, fluid geochemistry,
paleo-volcanology, geomicrobiology related to deep biosphere research
Drilling the Eger Rift: previous steps and future plans
Spicak, Förster, Horsfield (2005)
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Possible design of the observatory at
depth by three to four 3D high arrays
1st Eger Rift WS & pre-proposal (Spicak, Förster, Horsfield, 2005)
2005-2013: “pre-site studies” (German ICDP) & independent research
2007: research bundle “swarm earthquakes” (coordinated by Jentzsch et al.)
2010: NW Bohemia initiative (coordinated by Korn et al.)
2013: Eger rift workshop at GFZ in Potsdam (assoc. to ICDP)
2014: full proposal submission
Dahm et al., 2013, Scientific Drilling
Study area:
main fault zones
MLFZ: Mariánské Lázně
fault zone
PPZ: Počatky-Plesná fault
zone
TFZ: Tachov Fault zone
ZH: Železná hůrka scoria
cone
MM: Mýtina maar
KH: Komorní hůrka scoria
cone
Nickschick et al., subm. to IJES
CO2 gas fluxes, Hartoušov
X
CO2-dominated fluids
(CO2 conduits, pull apart
basin)
2 magmatic reservoirs in
ca. 25-65 km depth
Bacteria: 107 cells L-1
Archaea: 104 cells L-1
X
Nickschick et al., subm. to IJES
Seismically triggered microbial methane production
Bräuer et al., 2005, Geochemical J
Origin of life
Deep-reaching
tectonic fault
systems
Raw material incl.
phosphate available
Supercritical CO2 as
non-polar solvent
Schreiber et al., 2012, Orig Life Evol Biosph
Natural lab for deep life research
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Active geodynamic-triggered deep subsurface
ecosystem
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Detailed geophysical and geochemical background
knowledge
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First pre-examination drilling for deep biosphere in
August 2015
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Multidisciplinary research interest
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Economic interest: drinking water, spas and resorts
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Easily accessible and logistically excellent developed