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Formation of low-magnesium calcite at cold seeps in an aragonite sea
Feng, D; Roberts, HH; Joye, SB; Heydari, E; feng@scsio.ac.cn
2014
发表期刊TERRA NOVA
ISSN0954-4879
卷号26期号:2页码:150-156
摘要This study investigates the conditions of occurrence and petrographic characteristics of low-Mg calcite (LMC) from cold seeps of the Gulf of Mexico at a water depth of 2340m. Such LMC mineral phases should precipitate in calcite seas rather than today's aragonite sea. The C-13-depleted carbonates formed as a consequence of anaerobic oxidation of hydrocarbons in shallow subsurface cold seep environments. The occurrence of LMC may result from brine fluid flows. Brines are relatively Ca2+-enriched and Mg2+-depleted (Mg/Ca mole ratio <0.7) relative to seawater, where the Mg/Ca mole ratio is ~5, which drives high-Mg calcite and aragonite precipitation. The dissolution of aragonitic mollusk shells, grains and cements was observed. Aerobic oxidation of hydrocarbons and H2S is the most likely mechanism to explain carbonate dissolution. These findings have important implications for understanding the occurrence of LMC in deep water marine settings and consequently their counterparts in the geological record.
部门归属[Feng, Dong] Chinese Acad Sci, Key Lab Marginal Sea Geol, South China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China ; [Roberts, Harry H.] Louisiana State Univ, Inst Coastal Studies, Dept Oceanog & Coastal Sci, Baton Rouge, LA 70803 USA ; [Joye, Samantha B.] Univ Georgia, Dept Marine Sci, Athens, GA 30602 USA ; [Heydari, Ezat] Jackson State Univ, Dept Phys Atmospher Sci & Geosci, Jackson, MS 39217 USA
学科领域Geology
资助者Hundred Talents Program of CAS, NSFC [91228206, 41373085]; GIGCAS 135 project [Y234021001]; NSF Emerging Frontiers program [EF-0801741]; LSU Boyd Professorship ; Hundred Talents Program of CAS, NSFC [91228206, 41373085]; GIGCAS 135 project [Y234021001]; NSF Emerging Frontiers program [EF-0801741]; LSU Boyd Professorship ; Hundred Talents Program of CAS, NSFC [91228206, 41373085]; GIGCAS 135 project [Y234021001]; NSF Emerging Frontiers program [EF-0801741]; LSU Boyd Professorship ; Hundred Talents Program of CAS, NSFC [91228206, 41373085]; GIGCAS 135 project [Y234021001]; NSF Emerging Frontiers program [EF-0801741]; LSU Boyd Professorship
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收录类别sci
资助项目海洋地质
资助者Hundred Talents Program of CAS, NSFC [91228206, 41373085]; GIGCAS 135 project [Y234021001]; NSF Emerging Frontiers program [EF-0801741]; LSU Boyd Professorship ; Hundred Talents Program of CAS, NSFC [91228206, 41373085]; GIGCAS 135 project [Y234021001]; NSF Emerging Frontiers program [EF-0801741]; LSU Boyd Professorship ; Hundred Talents Program of CAS, NSFC [91228206, 41373085]; GIGCAS 135 project [Y234021001]; NSF Emerging Frontiers program [EF-0801741]; LSU Boyd Professorship ; Hundred Talents Program of CAS, NSFC [91228206, 41373085]; GIGCAS 135 project [Y234021001]; NSF Emerging Frontiers program [EF-0801741]; LSU Boyd Professorship
WOS记录号WOS:000332700800008
引用统计
被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/10632
专题中科院边缘海地质重点实验室
通讯作者feng@scsio.ac.cn
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GB/T 7714
Feng, D,Roberts, HH,Joye, SB,et al. Formation of low-magnesium calcite at cold seeps in an aragonite sea[J]. TERRA NOVA,2014,26(2):150-156.
APA Feng, D,Roberts, HH,Joye, SB,Heydari, E,&feng@scsio.ac.cn.(2014).Formation of low-magnesium calcite at cold seeps in an aragonite sea.TERRA NOVA,26(2),150-156.
MLA Feng, D,et al."Formation of low-magnesium calcite at cold seeps in an aragonite sea".TERRA NOVA 26.2(2014):150-156.
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