Sluggish and steady focussed flows through fine-grained sediments: The methane-derived cylindrical concretions of the Tertiary Piedmont Basin (NW Italy)
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- 作者：Simona Cavagna ; Pierangelo Clari ; Francesco Dela Pierre ; Luca Martire ; Marcello Natalicchio ; marcello.natalicchio@unito.it" class="auth_mail" title="E-mail the corresponding author
- 关键词：Cylindrical concretions ; Methane-derived carbonates ; Fluid conduits ; Microbial dolomite ; Gas hydrates ; Tertiary Piedmont Basin ; NW Italy
- 刊名：Marine and Petroleum Geology
- 出版年：2015
- 出版时间：September 2015
- 年：2015
- 卷：66
- 期：part_P3
- 页码：596-605
- 全文大小：5459 K
文摘
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Cylindrical concretions developed around ancient fluid conduits.
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They record steady, sluggish fluxes of methane-rich fluids through muddy sediments.
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They result from microbially-induced dolomite precipitation.
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They formed below the seafloor, between the SO4/CH4 and the oxic/anoxic interfaces.
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They preserve only the highest part of fluid conduits.