墨西哥湾北部上陆坡GreenCanyon140冷泉活动在自生碳酸盐岩中的.PDF

42 3 Vol.42, No.3, 212–220 2013 5 GEOCHIMICA May, 2013 Green Canyon 140 1,2 1* , (1. , , 510640; 2. , 100049) : Green Canyon 140 , , , , , δ13C 36.1‰5.1‰, CO 2 14C 46.525.8 ka BP, 17.611.7 ka BP, ~1.2 ka BP, : ; ; ; 14C ; ; : P593; P597; P736.2 : A : 0379-1726(2013)03-0212-09 Cold seep activities recorded by geochemical characteristics of authigenic carbonates from Green Canyon 140, Gulf of Mexico BIAN You-yan1,2 and CHEN Duo-fu 1* 1. CAS Key Laboratory of Marginal Sea Geology, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China ; 2. University of Chinese Academy of Sciences, Beijing 100049, China Abstract: Seep carbonates collected from Green Canyon block 140, Gulf of Mexico, could be divided into three types: nodule-rich carbonates, bioclast-rich carbonates and massive carbonates. XRD investigation shows that high Mg-calcite and aragonite are the dominate minerals. Additionally, nodule-rich carbonates contain minor amounts of dolomite and bioclast-rich carbonates include some low Mg-calcite. Peloids, clotted