| 大洋橄榄岩的蛇纹岩石化研究进展评述 |
| |
| 引用本文： | 汪小妹,曾志刚,欧阳荷根,殷学博,王晓媛,陈帅,张国良,武力.大洋橄榄岩的蛇纹岩石化研究进展评述[J].地球科学进展,2010,25(6):605-616. |
| |
| 作者姓名： | 汪小妹 曾志刚 欧阳荷根 殷学博 王晓媛 陈帅 张国良 武力 |
| |
| 作者单位： | 1. 中国科学院海洋研究所海洋地质与环境重点实验室,山东,青岛,266071;中国科学院研究生院,北京,100049
2. 中国科学院海洋研究所海洋地质与环境重点实验室,山东,青岛,266071 |
| |
| 基金项目： | 中国科学院知识创新工程重要方向项目，国家自然科学基金，## |
| |
| 摘 要： | 橄榄岩的蛇纹石化是大洋中不可忽略的重要地质过程,近年来引起广泛关注。大洋橄榄岩的蛇纹石化主要发生在洋中脊和汇聚板块边缘等环境中,大洋蛇纹岩典型的矿物组合包括:蛇纹石±磁铁矿±滑石±水镁石±角闪石。其中蛇纹石根据其矿物的晶体结构特征可分为利蛇纹石、纤蛇纹石和叶蛇纹石3种类型;偏光显微镜下可将蛇纹石结构划分为3类:假晶结构、非假晶结构和过渡结构。橄榄岩的蛇纹石化不仅会改变岩石的物理性质,如导致岩石密度的减小和地震波速的降低、影响橄榄岩的磁性等,而且也会对橄榄岩的流变性产生重要影响。大洋超基性岩系热液系统的发现,进一步激发了研究者们对大洋橄榄岩蛇纹石化研究的兴趣。与橄榄岩蛇纹石化相关的喷口流体含有较高的H2和CH4含量,此外,蛇纹石化是一个放热反应,可以驱动热液循环,导致Lost City等中低温型热液系统的出现。
|
| 关 键 词： | 橄榄岩 蛇纹石化 矿物 岩石物理性质 热液系统 |
Review of Progress in Serpentinization Research of Oceanic Peridotites |
| |
| WANG Xiaomei,ZENG Zhigang,OUYANG Hegen,YIN Xuebo,WANG Xiaoyuan,CHEN Shuai,ZHANG Guoliang,WU Li.Review of Progress in Serpentinization Research of Oceanic Peridotites[J].Advance in Earth Sciences,2010,25(6):605-616. |
| |
| Authors: | WANG Xiaomei ZENG Zhigang OUYANG Hegen YIN Xuebo WANG Xiaoyuan CHEN Shuai ZHANG Guoliang WU Li |
| |
| Institution: | 1.Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, Shandong 266071, China;
2. Graduate University of Chinese Academy of Sciences, Beijng 100049, China |
| |
| Abstract: | Serpentinization of peridotites is a non-negligibly important geologic process in the oceans, which has attracted widespread attention in recent years. Serpentinization of the oceanic peridotites occurred largely in tectonic settings of mid-ocean ridges and convergent margins. A typical abyssal serpentinite is made up of serpentine minerals ± magnetite ± talc ± brucite ±amphibole. The three dominant species of serpentine minerals are lizardite, chrysotile and antigorite. Serpentine textures under the polarizing microscope can be divided into three categories: pseudomorphic textures, non-pseudomorphic textures and transitional textures. The physical properties of abyssal peridotites are strongly modified by serpentinization: serpentinization is responsible for a strong decrease in density and seismic velocities, furthermore, the magnetic properties of peridotites are also strongly affected by serpentinization; in addition, serpentinization of peridotites also changes the rheology of the altered rocks. The discovery of ultramafic hosted hydrothermal systems further arouses the interest of researchers in serpentinization of oceanic peridotites. Vent fluids associated with serpentinization of peridotites contain high concentrations of H2 and CH4. Serpentinization is an exothermic reaction and can drive hydrothermal circulation, resulting in the occurrence of low-medium temperature hydrothermal system like Lost City. |
| |
| Keywords: | Peridotite Serpentinization Mineral Petrophysical property Hydrothermal system |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《地球科学进展》浏览原始摘要信息 |
| 点击此处可从《地球科学进展》下载免费的PDF全文 |
|
