中国蛇绿岩清理——兼论蛇绿岩研究的新思路
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本文为中国地质调查局地质调查项目(编号:DD20190358、DD20221646)、中国科学院地质与地球物理研究所岩石圈演化国家重点实验室项目(编号:81300001)、国家重点研发计划项目(编号:2018YFC1505501、2016YFC0600510)和国家自然科学基金资助项目(编号:41872253)的成果


Review of ophiolites in China——Discuss on a new method for the study of ophiolites
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    摘要:

    中国蛇绿岩研究取得了很大的成绩,也存在许多问题。文中简要评述了日喀则、三江、青海、北秦岭、中亚造山带、东北以及中国南方蛇绿岩的若干问题,指出中国划归入蛇绿岩的地质体(组合)太多了,把许多可能不是蛇绿岩的地质体(组合)也当成了蛇绿岩。当前需要做的是去伪存真,对中国蛇绿岩进行一次认真的清理。文中指出,地幔橄榄岩无疑是蛇绿岩最重要的成员,它来自洋壳下。世界上还有另一类来自陆壳下的地幔岩,被称为“造山橄榄岩”。因此,地幔橄榄岩并非蛇绿岩所独有。此外,有越来越多的数据表明,在许多不同的构造背景下都可以出现类似MORB(大洋中脊玄武岩)地球化学性质的玄武岩,例如洋岛、岛弧、大陆溢流玄武岩、板内玄武岩以及太古宙(拉斑玄武岩和科马提岩)等。因此,不能简单地认为一个地区只要有了地幔橄榄岩和MORB就是蛇绿岩了。文中回顾了蛇绿岩研究的两个发展阶段:前一个阶段以1972年的彭罗斯会议为标志,开启了蛇绿岩研究的新篇章,当时的学术界主要关注蛇绿岩的岩石学和地球化学问题,关心蛇绿岩的岩石组合。新的阶段是从20世纪后期逐渐发展起来的,于近期取得了突出的进展。笔者等强调指出,蛇绿岩(野外出露更多的是蛇绿混杂岩)即蛇绿岩套,它不仅包括一个特定的岩石组合,还包括深海沉积。文中肯定了中外学术界在蛇绿岩构造研究方面获得的许多新发现、新思路和新进展。此外,大数据和地球物理方法也是非常有意义的。蛇绿岩是一个复杂体系,不确定的问题相当多。它们的解决需要构造地质学家、地层学家、古生物学家、岩石学家、地球化学家、年代学家以及地球物理学家的共同努力。

    Abstract:

    China’s ophiolite research has made many achievements, and there are many problems. The article briefly reviews several issues in Xigaze, Sanjiang, Qinghai, North Qinling, Central Asian orogenic belts, northeast and southern China ophiolite belts, and points out that China’s ophiolite belts are divided too much. Considering many that may not be ophiolite as ophiolite. What needs to be done now is to remove the falsehood and carry out a serious clean-up of the Chinese ophiolite. The article pointed out that the mantle peridotite is undoubtedly the most important member of the ophiolite, which comes from under the ocean crust. There is another type of mantle from under the continental crust in the world, called orogenic peridotite. Therefore, the mantle peridotite is not unique to ophiolite. In addition, more and more data show that MORB does not only appear in mid-ocean ridges, but also in many other tectonic environments, such as ocean islands, island arcs, continental overflow basalts, intraplate basalts, and Archaean (Tholeiite and Komatiite), etc. Therefore, it cannot be simply considered that mantle peridotite and MORB are exposed in a region is ophiolite. The article reviewed the two development stages of ophiolite research: the previous stage was marked by the Penrose Conference in 1972, which opened a letter chapter to ophiolite research. At that time, the academic circles were mainly concerned with the petrology and geochemistry of ophiolite, as well as the rock assemblage of ophiolite. The new stage has gradually developed from the latter part of the last century, and outstanding progress has been made recently. The author emphasizes that the ophiolite (more ophiolite mélange outcropped in the wild) is the ophiolite suite, which includes not only a specific rock combination, but also deep-sea deposits and mixed accumulations. The article affirmed the many new discoveries, new ideas and new developments in the study of ophiolite structures by Chinese and foreign academic circles. In addition, the geophysical methods introduced by Shao Ji'an are meaningful. Ophiolite is a complex system with many uncertain issues. It requires the joint efforts of structural geologists, stratigraphers, paleontologists, petrologists, geochemists, geochronologists and geophysicists.

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张旗,任纪舜,赵磊,焦守涛,王跃,王振.2022.中国蛇绿岩清理——兼论蛇绿岩研究的新思路[J].地质论评,68(3):1061-1078,[DOI].
ZHANG Qi, REN Jishun, ZHAO Lei, JIAO Shoutao, WANG Yue, WANG Zhen.2022. Review of ophiolites in China——Discuss on a new method for the study of ophiolites[J]. Geological Review,68(3):1061-1078.

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  • 收稿日期:2021-11-11
  • 最后修改日期:2022-03-02
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  • 在线发布日期: 2022-05-19
  • 出版日期: 2022-05-15