Review of ophiolites in China——Discuss on a new method for the study of ophiolites
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    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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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(2):2022030013.

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History
  • Received:
  • Revised:March 02,2022
  • Adopted:
  • Online: March 19,2022
  • Published: March 15,2022