Element Patterns of Primary Low-Magnesium Calcite from the Seafloor of the Gulf of Mexico
文献类型：期刊论文
| 作者 | Huang, Huiwen3,4; Wang, Xudong1,3,4; Gong, Shanggui1; Krake, Nicola5; Birgel, Daniel5; Peckmann, Joern5; Chen, Duofu1,3; Feng, Dong1,3 |
| 刊名 | MINERALS
 |
| 出版日期 | 2020 |
| 卷号 | 10期号:4页码:299 |
| 关键词 | low-magnesium calcite authigenic carbonates diagenesis element contents Gulf of Mexico |
| ISSN号 | 2075-163X |
| DOI | 10.3390/min10040299 |
| 英文摘要 | High-magnesium calcite (HMC) and aragonite are metastable minerals, which tend to convert into low-magnesium calcite (LMC) and dolomite. During this process, primary compositions are frequently altered, resulting in the loss of information regarding the formation environment and the nature of fluids from which the minerals precipitated. Petrological characteristics have been used to recognize primary LMC, however, neither the element distribution within primary LMC nor the effect of diagenetic alteration on element composition have been studied in detail. Here, two mostly authigenic carbonate lithologies from the northern Gulf of Mexico dominated by primary LMC were investigated to distinguish element compositions of primary LMC from LMC resulting from diagenetic alteration. Primary LMC reveals similar or lower Sr/Ca ratios than primary HMC. The lack of covariation between Sr/Ca ratios and Mg/Ca ratios in the studied primary LMCs are unlike compositions observed for LMC resulting from diagenetic alteration. The Sr/Mn ratios and Mn contents of the primary LMCs are negatively correlated, similar to secondary, diagenetic LMC. Element mapping for Sr and Mg in the primary LMC lithologies revealed no evidence of conversion from aragonite or HMC to LMC, and a homogenous distribution of Mn is in accordance with the absence of late diagenetic alteration. Our results confirm that Sr/Ca ratios, Mg/Ca ratios, and element systematics of primary LMC are indeed distinguishable from diagenetically altered carbonates, enabling the utilization of element geochemistry in recognizing primary signals in carbonate archives. |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/18555]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Univ Hamburg, Inst Geol, Ctr Earth Syst Res & Sustainabil, D-20146 Hamburg, Germany 3.Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Peoples R China 4.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266061, Peoples R China 5.Shanghai Ocean Univ, Coll Marine Sci, Shanghai Engn Res Ctr Hadal Sci & Technol, Shanghai 201306, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, Huiwen,Wang, Xudong,Gong, Shanggui,et al. Element Patterns of Primary Low-Magnesium Calcite from the Seafloor of the Gulf of Mexico[J]. MINERALS,2020,10(4):299. |
| APA | Huang, Huiwen.,Wang, Xudong.,Gong, Shanggui.,Krake, Nicola.,Birgel, Daniel.,...&Feng, Dong.(2020).Element Patterns of Primary Low-Magnesium Calcite from the Seafloor of the Gulf of Mexico.MINERALS,10(4),299. |
| MLA | Huang, Huiwen,et al."Element Patterns of Primary Low-Magnesium Calcite from the Seafloor of the Gulf of Mexico".MINERALS 10.4(2020):299. |
入库方式： OAI收割
来源：南海海洋研究所
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