地球科学进展 ›› 2008, Vol. 23 ›› Issue (6): 595 -603. doi: 10.11867/j.issn.1001-8166.2008.06.0595

综述与评述 上一篇    下一篇

  1. 国家海洋局海底科学重点实验室,国家海洋局第二海洋研究所,浙江 杭州 310012
  • 收稿日期:2007-10-24 修回日期:2008-05-14 出版日期:2008-06-10
  • 通讯作者: 李小虎 E-mail:lixh09@sohu.com
  • 基金资助:


Advances in Slow-Ultraslow-Spreading Southwest Indian Ridge

Li Xiaohu,Chu Fengyou,Lei Jijiang,Zhao Jianru   

  1. Key Laboratory of Submarine Geosciences of SOA, Second Institute of Oceanography, SOA, Hangzhou 310012, China
  • Received:2007-10-24 Revised:2008-05-14 Online:2008-06-10 Published:2008-06-10


Southwest Indian Ridge (SWIR) is characterized by slow-spreading to ultraslow-spreading rate and oblique spreading, which reveals an ultraslow-spreading class of ocean ridge. Recently, SWIR has becoming one of hotspots researching on the global mid-ocean ridge systems and also the important region for the study of seafloor tectonic setting, hydrothermal activity, deep process of mantle and its dynamic mechanism. This review summarizes study history, morphologic and structural characteristics, hydrothermal activity and geochemical characteristics of basalt and peridotite in on SWIR. The particularity of both ultraslow spreading ridge and ultramafic hosted hydrothermal system are discussed. The ultraslow and oblique spreading can contribute to generating peridotite and serpentite on ultraslow spreading ridges as well as ultramafic-hosted hydrothermal system related to the exothermic serpentinization reactions, which is different from “traditional” basalt-hosted hydrothermal system. The more hydrothermal activity and the slower spreading rate may lead to the deposition of larger ore bodies due to their localization on long-lived fault structures on SWIR.Therfore, Mantle mantle rocks exposed widely and its serpentinization, ultramafic hosted hydrothermal system and mineralization of hydrothermal sulfide are proposed as the important future avenue of research in on SWIR.


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