| Citation: |
ZHI Rong-jun, FAN Shuang-hu, CHEN Shu-e, YUAN Wei, RUI Ting, WANG Jiang-wei, LIU Ming, MAO You-liang. Tectonic Setting of the Baitutang Ophiolite at the Northern Margin of South Tianshan Belt[J]. Northwestern Geology, 2013, 46(4): 33-41.
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Tectonic Setting of the Baitutang Ophiolite at the Northern Margin of South Tianshan Belt
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Abstract
There exposed part of the Ophiolitic Melange in Baitutang,the norht of the South Tianshan in Xinjiang. To understand the ultrabasic rocks forming environment, this paper focuses on the 9 samples of this area are tested by the study of geochemical method.Research and analysis of the geochemical results that the serpentinite in the area with low SiO2,TiO2,CaO,K2O,Na2O,MgO, Al2O3 for the characteristics,with high concentration of compatible elements Cr, Co, and Ni, depleted in incompatible elements, and large ion lithophile element content is low, the overall features similar to the Ocean lherzolite, features representing the mantleresidue.The basalts possess high TiO2 and MgO contents,not only low Al2O3 and K2O,but also Na2O>K2O.Compared with MORB, the elements of Nb, Ta apparent are loss. Compared with the primitive mantle, with slow features similar to the N-MORB's losses, The geochemical characteristics of the main elements and trace elements show that rock should be formed in the tectonic environment similar to mid-ocean ridge,and the magma derived from depleted mantle zone.-
Keywords:
- South Tianshan /
- ophiolitic melange /
- geochenistry /
- tectonic setting
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References
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ZHI Rong-jun, FAN Shuang-hu, CHEN Shu-e, YUAN Wei, RUI Ting, WANG Jiang-wei, LIU Ming, MAO You-liang. Tectonic Setting of the Baitutang Ophiolite at the Northern Margin of South Tianshan Belt[J]. Northwestern Geology, 2013, 46(4): 33-41.
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