• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Geochemical Journal >Geochemical characteristics of hydrothermal fluids at Hatoma Knoll in the southern Okinawa Trough
【24h】

Geochemical characteristics of hydrothermal fluids at Hatoma Knoll in the southern Okinawa Trough

机译：冲绳海槽南部Hatoma Knoll热液的地球化学特征

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Chemical and isotopic compositions of hydrothermal fluids from Hatoma Knoll in the southern Okinawa Trough were investigated. The hydrothermal fluids were derived from a single pure hydrothermal fluid source, but they underwent phase separation beneath the seafloor prior to venting. Only vapor-like fluids vent at the Hatoma system, and the most active area is around the center of the crater, based on the location of the maximum temperature and the lowest Cl- concentrations. Compared with other hydrothermal systems in the world, at Hatoma the pH and alkalinity, as well as the B, NH4+, K, Li, CO2, and CH4 concentrations, were higher, and the Fe and Al concentrations were lower, suggesting that the characteristics of the Hatoma hydrothermal fluids are comparable to those of the other Okinawa Trough hydrothermal fluids. Helium isotope ratios were lower than those of sediment-starved hydrothermal systems, suggesting that He-4 derived from the sediment is supplied to the hydrothermal fluids in Hatoma Knoll. The carbon isotope ratios of CO2 in the hydrothermal fluids indicate an influence of organic carbon decomposition. The carbon isotope ratios of CH4 in the hydrothermal fluids imply that most of the CH4 originated from microbial methane produced in a recharge zone of the hydrothermal system. Although sediment influences are a typical feature of Okinawan Trough hydrothermal fluids, the Hatoma hydrothermal system has the lowest carbon isotope ratios of CH4 among them, which suggests that Hatoma is the most highly influenced by the sediments in the recharge zone. Thus, the degree of the sediment influences has a variable in each hydrothermal field in the Okinawa Trough.
机译：研究了来自冲绳海槽南部Hatoma Knoll的热液的化学和同位素组成。热液来自单一的纯热液源，但是在排放之前，它们在海底下经历了相分离。基于最高温度和最低Cl-浓度的位置，只有类似蒸气的流体在Hatoma系统中排出，并且最活跃的区域位于火山口的中心附近。与世界上其他热液系统相比，哈托玛的pH和碱度以及B，NH4 +，K，Li，CO2和CH4的浓度较高，而Fe和Al的浓度较低，表明该特性Hatoma热液的数量可与其他冲绳海槽热液的数量相媲美。氦同位素比率低于缺乏沉积物的热液系统，表明来自沉积物的He-4被提供给Hatoma Knoll的热液。热液中CO2的碳同位素比表明有机碳分解的影响。水热流体中CH4的碳同位素比表明，大部分CH4源自水热系统补给区中产生的微生物甲烷。尽管沉积物的影响是冲绳海槽热液的典型特征，但Hatoma热液系统中CH4的碳同位素比最低，这表明Hatoma受补给区沉积物的影响最大。因此，在冲绳海槽的每个热液场中，沉积物影响的程度都有变化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号