Genesis of anhydrite in hydrothermally altered basalt from the East Pacific Rise near 13°N
文献类型：CNKI期刊论文
| 作者 | CHEN Shuai; WANG Xiaoyuan; YIN Xuebo; ZHANG Guoliang |
| 发表日期 | 2013-02-15 |
| 出处 | Acta Oceanologica Sinica
 |
| 关键词 | anhydrite, hydrothermal alteration, pillow basalt, East Pacific Rise 13°N |
| 英文摘要 | This study reports the occurrence of anhydrite in hydrothermally altered pillow basalt (12°50.55′N, 103°57.62′W, water depth 2 480 m), which may have been produced in the basalt during seawater-basalt interaction in the laboratory. The existence of anhydrite in the altered basalt indicates extensive hightemperature hydrothermal alteration at the surface of seafloor pillow basalt. Microprobe analysis shows significant chemical zoning in the hydrothermally altered pillow basalt, in which Ca, Si and Al contents decrease and P, Fe, Mn, Cr and S contents increase from fresh basalt to altered basalt. The negative correlation between Rb-Sr and Li-Sr, and negative correlation between Li-Ca and Rb-Ca in the high-temperature vent fluids show that these fluids underwent anhydrite precipitation before fluid jetting due to mixing with seawater in the sub-seafloor. Based on these observations, we show that not all Ca in the anhydrite comes from basalt in the reaction zone, and that the basalts on the seafloor or in the upflow zone may also provide Ca for anhydrite. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | The National Key Basic Research Program of China under contract No. 2013CB429700 ; the National Special Fund for the 12th Five Year Plan of COMRA under contract Nos DY125-12-R-02, DY125-11-R-05 ; the National Natural Science Foundation of China under contract Nos 40830849, 40976027 and 40906029 ; Shandong Province Natural Science Foundation of China for Distinguished Young Scholars under contract No. JQ200913 |
| 卷 | v.32期:02页:14-19 |
| 语种 | 英文; |
| 分类号 | P588.145 |
| ISSN号 | 0253-505X |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/190972]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.SeafloorHydrothermalActivityLaboratoryoftheKeyLaboratoryofMarineGeologyandEnvironment,InstituteofOceanology,ChineseAcademyofSciences 2.GraduateUniversityofChineseAcademyofSciences |
| 推荐引用方式 GB/T 7714 | CHEN Shuai,WANG Xiaoyuan,YIN Xuebo,et al. Genesis of anhydrite in hydrothermally altered basalt from the East Pacific Rise near 13°N. 2013. |
入库方式： OAI收割
来源：海洋研究所
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