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Genesis of anhydrite in hydrothermally altered basalt from the East Pacific Rise near 13°N
  • ISSN号：0253-505X
  • 期刊名称：《海洋学报：英文版》
  • 时间：0
  • 分类：P588.1[天文地球—岩石学;天文地球—地质学] P618.51[天文地球—矿床学;天文地球—地质学]
  • 作者机构：[1]Seafloor Hydrothermal Activity Laboratory of the Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China, [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • 相关基金：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. Acknowledgements The authors would like to thank the crew in DY105-12, 14 for helping us collect samples.
作者： CHEN Shuai[1,2], WANG Xiaoyuan[1], YIN Xuebo[1], ZHANG Guoliang[1]
关键词： 变玄武岩, 热液蚀变, 硬石膏, 东太平洋, 海隆, 成因, RB-SR, 相互作用, anhydrite, hydrothermal alteration, pillow basalt, East Pacific Rise 13°N
中文摘要：

这研究在热水地改变的枕头暗岩报导硬石膏的出现(12+

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 high- temperature 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 A1 contents de- crease 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 fuids show that these fluids underwent anhydrite precipitation before fluid jetting due to mixing with sea- water 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.

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期刊信息
  • 《海洋学报：英文版》
  • 主管单位:
  • 主办单位:中国海洋学会
  • 主编：潘德炉
  • 地址：北京海淀大慧寺路8号
  • 邮编：100081
  • 邮箱：hyxbe@263.net
  • 电话：010-62179976
  • 国际标准刊号：ISSN：0253-505X
  • 国内统一刊号：ISSN：11-2056/P
  • 邮发代号:82-285
  • 获奖情况:
  • 国内外数据库收录:
  • 俄罗斯文摘杂志,美国化学文摘（网络版）,荷兰文摘与引文数据库,美国剑桥科学文摘,美国科学引文索引（扩展库）,英国科学文摘数据库,英国动物学记录
  • 被引量:331