In-situ borehole temperature measurements confirm dynamics of the gas hydrate stability zone at the upper Danube deep sea fan, Black Sea

Riedel Michael; Freudenthal Tim; Bialas Jorg; Papenberg Cord; Haeckel Matthias; Bergenthal Markus; Pape Thomas; Bohrmann Gerhard

首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >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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In-situ borehole temperature measurements confirm dynamics of the gas hydrate stability zone at the upper Danube deep sea fan, Black Sea

机译：原位钻孔温度测量确认煤气水合物稳定区的储水稳定区，黑海

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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 similar to 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. (C) 2021 Elsevier B.V. All rights reserved.

机译：使用MARUM-MeBo200海底钻机进行了取芯、地球物理测井和现场温度测量，以描述黑海罗马尼亚附近多瑙河深海扇沉积物中的天然气水合物赋存情况。新的钻井数据显示，沉积物中没有明显的天然气水合物饱和迹象，但底部模拟反射层（BSR）深度存在游离气体。现场温度和岩芯衍生的地球化学数据表明，天然气水合物稳定带（BGHSZ）的当前基底比BSR浅20米。对钻井现场周围地震数据的调查显示，在几个位置，以前被困在前BGHSZ的游离气体向上迁移，在BSR上方形成新的反射。这表明多瑙河深海扇中的天然气水合物系统仍在对末次冰期末期开始的气候变化作出反应。（c）2021爱思唯尔B.V.保留所有权利。

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来源
《Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System》 |2021年第1期|共12页
作者
Riedel Michael; Freudenthal Tim; Bialas Jorg; Papenberg Cord; Haeckel Matthias; Bergenthal Markus; Pape Thomas; Bohrmann Gerhard;
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作者单位

GEOMAR Helmholtz Ctr Ocean Res Kiel Wischhofstr 1-3 D-24148 Kiel Germany;

Univ Bremen MARUM Ctr Marine Environm Sci Leobener Str 8 D-28359 Bremen Germany;

GEOMAR Helmholtz Ctr Ocean Res Kiel Wischhofstr 1-3 D-24148 Kiel Germany;

GEOMAR Helmholtz Ctr Ocean Res Kiel Wischhofstr 1-3 D-24148 Kiel Germany;

GEOMAR Helmholtz Ctr Ocean Res Kiel Wischhofstr 1-3 D-24148 Kiel Germany;

Univ Bremen MARUM Ctr Marine Environm Sci Leobener Str 8 D-28359 Bremen Germany;

Univ Bremen MARUM Ctr Marine Environm Sci Leobener Str 8 D-28359 Bremen Germany;

Univ Bremen MARUM Ctr Marine Environm Sci Leobener Str 8 D-28359 Bremen Germany;

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原文格式 PDF
正文语种 eng
中图分类天文学、地球科学;行星、卫星、彗星、流星、陨星;
关键词
in-situ temperature measurements; gas hydrates; bottom-simulating reflector; Black Sea; seafloor drilling rig;

机译：现场温度测量;天然气水合物;底部模拟反射器;黑海;海底钻机;

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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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