globalchange  > 气候变化与战略
DOI: 10.1016/j.epsl.2021.116869
论文题名:
In-situ borehole temperature measurements confirm dynamics of the gas hydrate stability zone at the upper Danube deep sea fan, Black Sea
作者: Riedel M.; Freudenthal T.; Bialas J.; Papenberg C.; Haeckel M.; Bergenthal M.; Pape T.; Bohrmann G.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2021
卷: 563
语种: 英语
中文关键词: Black Sea ; bottom-simulating reflector ; gas hydrates ; in-situ temperature measurements ; seafloor drilling rig
英文关键词: Climate change ; Gas hydrates ; Gases ; Hydration ; Infill drilling ; Reflection ; Seismology ; Black sea ; Borehole temperature ; Bottom simulating reflector ; Deep sea fan ; Free gas ; Gas hydrate stability zones ; Geophysical logging ; In-situ temperature ; In-situ temperature measurement ; Seafloor drilling rig ; Temperature measurement ; borehole ; deep-sea sediment ; drilling rig ; gas hydrate ; in situ measurement ; seafloor ; submarine fan ; temperature gradient ; Black Sea ; Romania
英文摘要: Coring, geophysical logging, and in-situ temperature measurements were performed with the MARUM-MeBo200 seafloor rig to characterize gas hydrate occurrences in sediments of the Danube deep sea fan, off Romania, Black Sea. The new drilling data showed no evidence for significant gas hydrate saturations within the sediments but the presence of free gas at the depth of the bottom-simulating reflector (BSR). In-situ temperature and core-derived geochemical data suggest that the current base of the gas hydrate stability zone (BGHSZ) is ∼20 m shallower than the BSR. Investigation of the seismic data around the drill sites shows several locations where free gas previously trapped at a former BGHSZ migrated upwards forming a new reflection above the BSR. This shows that the gas hydrate system in the Danube deep sea fan is still responding to climate changes initiated at the end of the last glacial maximum. © 2021 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165647
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作者单位: GEOMAR Helmholtz Centre for Ocean Research Kiel, Wischhofstrasse 1 – 3, Kiel, 24148, Germany; MARUM - Center for Marine Environmental Sciences, University Bremen, Leobener Str. 8, Bremen, 28359, Germany; Faculty of Geosciences, University of Bremen, Klagenfurter Str. 2 – 4, Bremen, 28334, Germany

Recommended Citation:
Riedel M.,Freudenthal T.,Bialas J.,et al. In-situ borehole temperature measurements confirm dynamics of the gas hydrate stability zone at the upper Danube deep sea fan, Black Sea[J]. Earth and Planetary Science Letters,2021-01-01,563
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