Full-Text Search:
Home|About CNKI|User Service|中文
Add to Favorite Get Latest Update

Microstructure and Fossilized Bacteria in Seep Carbonates from An Active Gas Vent in Green Canyon Block 238 of Gulf of Mexico

GUAN Hong-xiang1,2 CHEN Duo-fu1 Cathles L M3 Roberts H H4(1.Key Laboratory of Marginal Sea Geology,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Wushan,Guangzhou Guangdong 510640;2.Graduate School of the Chinese Academy of Sciences,Beijing 100039;3.Department of Earth & Atmospheric Sciences,Cornell University,Ithaca,New York 14853,USA;4.Coastal Studies Institute,Louisiana State University,Batton Rouge,LA 70803,USA)  
Seep carbonate were collected in an area actively seeping methane in the Green Canyon Block 338 of Gulf of Mexico,which is composed of microcrystalline calcite,cement and pyrite framboid.The cement is composed of speroidal,oval,and rod-shaped particles ~0.1 to 0.5 μm in diameter that filled the pores between the calcite crystals.The underside of the carbonate crusts occurs a micro-layer consisted of ball-,worm-,rod-shaped calcite particles.The larger ball(~5μm) in the micro-layer has a distinct cores surrounded by an outer shell which both consists of smaller calcite particles.Pyrite framboids are also arranged in an inner core surrounded by an outer layer.These layered-structure characterisuics of the carbonate balls and the pyrite framboids are similar with living colonies of methane oxidizing archea(MOA) and sulfate reducing bacteria(SRB).The speroidal,oval,and rod-shaped particles and layered-structure in the carbonate crusts suggest that these could be fossilized MOA and SRB bacteria.
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©CNKI All Rights Reserved