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THE HETEROGENEITY OF THE UPPER MANTLE OF THE CHINESE CONTINENT AND THE PROGNOSIS OF ORE RESOURCES |
Peng Cong, Li Xiaopeng, Xue Guangqi, Dong Yingjun |
Institute of Mineral Deposits, Chinese Academy of Geological Sciences, Beijing 100037 |
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Abstract Based on full collection, arrangement and integrated study of information from 11 globe geoscience transects (called GGT for short) and tens of other geophysical profiles (seismic profiles, geothermal flux profiles and magnetotelluric sounding profiles) in the Chinese continent as well as shear wave three-dimensional velocity structural data that cover the Chinese continent and neighboring regions, the present paper has described crustal structure, lithospheric structure and rheospheric structure in the Chinese continent and neighboring regiona, and made a brief discussion on the prognosis of ore resources in the Chinese continent. The lithospheric structure of China was developed on the basis of rheosphere of three different sorts of natures and hence shows obvious inheritance. The lithospheric structure is to certain extent in accord with the geotectonic unit, suggesting that the crustal structure is influenced and restricted by the lithosphere. The crust and the upper mantle both exhibit low-velocity nature, and the vertical low-vvelocity zones of seismic waves seem to be the good environment for the formation of endogenic polymetallic ore belts.
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Received: 31 March 1995
Published: 24 February 1996
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