Formation of low-magnesium calcite at cold seeps in an aragonite sea
文献类型：期刊论文
| 作者 | Feng, D ; Roberts, HH ; Joye, SB ; Heydari, E |
| 刊名 | TERRA NOVA
 |
| 出版日期 | 2014 |
| 卷号 | 26期号:2页码:150-156 |
| ISSN号 | 0954-4879 |
| 通讯作者 | feng@scsio.ac.cn |
| 中文摘要 | 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. |
| 学科主题 | Geology |
| 收录类别 | SCI |
| 资助信息 | Hundred Talents Program of CAS, NSFC [91228206, 41373085]; GIGCAS 135 project [Y234021001]; NSF Emerging Frontiers program [EF-0801741]; LSU Boyd Professorship |
| 原文出处 | WILEY-BLACKWELL |
| WOS记录号 | WOS:000332700800008 |
| 公开日期 | 2014-12-11 |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/10632]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 推荐引用方式 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.(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. |
入库方式： OAI收割
来源：南海海洋研究所
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