海底冷泉渗漏流体的总S和总Ca浓度变化及影响因素

现代地质 ›› 2010, Vol. 24 ›› Issue (3): 570-575.

• 天然气水合物专辑：地球化学 • 上一篇下一篇

海底冷泉渗漏流体的总S和总Ca浓度变化及影响因素

邸鹏飞^1,2, 黄华谷^1,2,陈多福^1,3

1.中国科学院广州地球化学研究所边缘海地质重点实验室，广东广州510640；2.中国科学院研究生院，北京100049；
3.中国科学院广州天然气水合物研究中心，广东广州510640

出版日期:2010-06-21 发布日期:2010-08-17
通讯作者: 陈多福,男，研究员，博士生导师,1962年出生，地球化学专业，主要从事冷泉碳酸盐岩及天然气水合物研究。
作者简介:邸鹏飞，男，博士研究生，1982年出生，海洋地质与石油地质专业，主要从事海底冷泉及天然气水合物研究。Email:dipf06@gig.ac.cn。
基金资助:
国家“863”海洋技术领域前沿探索项目(2007AA09Z221)；国家自然科学基金项目(40725011，U0733003)

Total Sulfur and Calcium Contents of Seep Fluids and Their Controls in the Cold Seep Sites

DI Peng-Fei^1,2, Huang-Hua-Gu^1,2, CHEN Duo-Fu^1,3

1.Key Laboratory of Marginal Sea Geology, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou,
Guangdong510640,China； 2. Graduate University of Chinese Academy of Sciences,Beijing100049,China；
3.Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou, Guangdong510640,China

Online:2010-06-21 Published:2010-08-17

摘要/Abstract

摘要：

通过对卡斯卡迪亚水合物脊和墨西哥湾布什山冷泉渗漏流体的原位测定总S和总Ca浓度分析，发现渗漏流体的总S和总Ca浓度约为海水浓度的50%~70%，讨论了冷泉流体活动特征以及流体的总S和总Ca浓度的控制因素。在这两个冷泉渗漏区海底渗漏流体的总S和总Ca浓度随时间变化的趋势比较一致，均是发生在流体渗漏流量速率高频变化周期。流体的总S和总Ca浓度的降低，可能主要受冷泉区海底广泛存在的甲烷缺氧氧化作用控制，同时也可能受到水合物分解、粘土矿物的去水反应和油气藏破坏产生的纯水的稀释作用的影响。

关键词: 渗漏流体, 总S和总Ca浓度, 甲烷缺氧氧化, 水合物分解, 粘土矿物去水反应

Abstract:

By analysis of insitu measured total sulfur and calcium contents in seep fluids at Bush Hill in Gulf of Mexico, and at Hydrate Ridge in Cascadia, this study observed that total sulfur and calcium contents of seep fluids are about 50%-70% of those of seawater, and discussed activity characteristics of seep fluids and the control factors of total sulfur and calcium contents of seep fluids. The tendency of the variation of total sulfur and calcium contents of seep fluids at these two seep sites is relatively consistent over time. The total sulfur and calcium contents of seep fluids are low during the stage of the high frequency variation of seep fluid flux; it might be mainly controlled by widelyoccurred anaerobic oxidation of methane (AOM) on the seafloor at seep sites, and also possibly affected by the dilution of pure water derived from hydrate dissociation, clay mineral dehydration and oilgas reservoir destroyed.

Key words: total seep fluid, sulfur and calcium content, anaerobic methane oxidation, hydrate dissolution, clay dehydration

中图分类号:

P736.4

邸鹏飞, 黄华谷, 陈多福. 海底冷泉渗漏流体的总S和总Ca浓度变化及影响因素[J]. 现代地质, 2010, 24(3): 570-575.

DI Peng-Fei, Huang-Hua-Gu, CHEN Duo-Fu. Total Sulfur and Calcium Contents of Seep Fluids and Their Controls in the Cold Seep Sites[J]. Geoscience, 2010, 24(3): 570-575.

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海底冷泉渗漏流体的总S和总Ca浓度变化及影响因素

Total Sulfur and Calcium Contents of Seep Fluids and Their Controls in the Cold Seep Sites

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