Advances in Earth Science ›› 2020, Vol. 35 ›› Issue (5): 452-464. doi: 10.11867/j.issn.1001-8166.2020.044

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The Inclusions in Superdeep Diamonds: Indication and Response to Deep Mantle Physical and Chemical Environment

Xinyu Zheng 1( ),Zhili Qiu 1, 2, 3( ),Xiaoqin Deng 1,Ying Ma 1,Taijin Lu 2   

  1. 1.Guangdong Key Laboratory of Geodynamic and Geological Hazards, Guangdong Key Laboratory of Geological Process and Mineral Resources Exploration, School of Earth Science and Engineering,Sun Yat-sen University, Guangzhou 510275, China
    2.NGTC Gems&Jewelry Institute of Beijing, Technology Innovation Center of Gems & Jewelry Inspection and Appraisal, MNR, Beijing 100013, China
    3.Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration,College of Earth Sciences, Guilin University of Technology,Guilin Guangxi 541006, China
  • Received:2020-02-05 Revised:2020-04-05 Online:2020-05-10 Published:2020-06-05
  • Contact: Zhili Qiu E-mail:zhengxy68@mail2.sysu.edu.cn;qiuzhili@mail.sysu.edu.cn
  • About author:Zheng Xinyu (1995-), female, Lishui City, Zhejiang Province, Master student. Research areas include gemology and mineralogy. E-mail: zhengxy68@mail2.sysu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China “The deep geologic process beneath the Yangtze craton: Constraints of monocrystalline diamonds from Ruan River basin and their inclusions”(41473030);“Detailed geochemistry of garnets related to the diamond in Southeastern Guizhou”(41703028)

Xinyu Zheng,Zhili Qiu,Xiaoqin Deng,Ying Ma,Taijin Lu. The Inclusions in Superdeep Diamonds: Indication and Response to Deep Mantle Physical and Chemical Environment[J]. Advances in Earth Science, 2020, 35(5): 452-464.

Superdeep diamonds and their inclusions are important samples to probe the physical and chemical environment and constitution of Earth’s deep mantle. By combining the studies of high-precision in-situ analysis and HPHT synthetic diamond experiments, and by reviewing the new discovery of classical mineral inclusions and their combinations, the ranges of different inclusion combinations, as well as the relationship between trace elements and temperature-pressure conditions were reoriented. The so-called nominally anhydrous minerals combinations, metal phases and redox environments in superdeep mantle were also affirmed. Meanwhile,the recent findings of inclusions and isotopes in superdeep diamonds support the fact that the remaining subduction ocean crust may be a significant reservoir of the deep mantle’s water and the deep mantle carbon cycle is closely related to oceanic subduction. Furthermore, although Chinese scholars have discovered some kinds of superdeep inclusions in diamonds from North China Craton and Yangtze Craton, and made considerable progress in the study of the formation of UHP diamonds and the genesis of ophiolite diamonds, there are still many scientific questions about superdeep diamonds that require further research.

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