气候变化领域集成服务门户(CCPortal): In-situ borehole temperature measurements confirm dynamics of the gas hydrate stability zone at the upper Danube deep sea fan, Black Sea

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DOI	10.1016/j.epsl.2021.116869
	In-situ borehole temperature measurements confirm dynamics of the gas hydrate stability zone at the upper Danube deep sea fan, Black Sea
	Riedel M.; Freudenthal T.; Bialas J.; Papenberg C.; Haeckel M.; Bergenthal M.; Pape T.; Bohrmann G.
发表日期	2021
ISSN	0012821X
卷号	563
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.
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
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203269
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
推荐引用方式 GB/T 7714	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],2021,563.
APA	Riedel M..,Freudenthal T..,Bialas J..,Papenberg C..,Haeckel M..,...&Bohrmann G..(2021).In-situ borehole temperature measurements confirm dynamics of the gas hydrate stability zone at the upper Danube deep sea fan, Black Sea.Earth and Planetary Science Letters,563.
MLA	Riedel M.,et al."In-situ borehole temperature measurements confirm dynamics of the gas hydrate stability zone at the upper Danube deep sea fan, Black Sea".Earth and Planetary Science Letters 563(2021).