| TRACE ELEMENTS GEOCHEMISTRY OF GRANITOID IN PANXI AREA |
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| 作者姓名： | 杨瑞瑛 陆德复 |
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| 作者单位： | Institute of High Energy Physics，Academia Sinica，Beijing，Institute of Geology，Academia Sinica，Beijing |
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| 摘 要： | A lot of granitoid rocks occur in Panxi area, SW China, which were formed during Jinningnian-Chengjiangnian, Hercynian-Indosinian and Yenshanian. According to their trace elements geochemical and petrochemical characteristics, they can be divided into calc-alkaline and alkaline granites. The petrogenesis and magma sources of these granitoid rocks are different. The Jinningnian-Chengjiangnian granitoid rocks include Mopanshan granite body, Moshaying granite body and Lugu granite body. The Mopanshan body might be formed by partial melting of the lower crust and due to refusion of basic volcanic rocks. The magma source of the Moshaying and the Lugu bodies might be formed by partial melting of the upper crust. The Hongge-Ailanghe granites belonging to the Hercynian-Indosinian may be products of complex melting from the crust-mantle materials caused by the increase of temperature during rifting stage in the area. The Cida and Taihe alkaline granites belonging to the Hercynian-Indosinian might be derived from
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TRACE ELEMENTS GEOCHEMISTRY OF GRANITOID IN PANXI AREA |
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| YANG RUIUING.TRACE ELEMENTS GEOCHEMISTRY OF GRANITOID IN PANXI AREA[J].Science in China(Chemistry),1988(9). |
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| Authors: | YANG RUIUING |
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| Abstract: | A lot of granitoid rocks occur in Panxi area, SW China, which were formed during Jinningnian-Chengjiangnian, Hercynian-Indosinian and Yenshanian. According to their trace elements geochemical and petrochemical characteristics, they can be divided into calc-alkaline and alkaline granites. The petrogenesis and magma sources of these granitoid rocks are different. The Jinningnian-Chengjiangnian granitoid rocks include Mopanshan granite body, Moshaying granite body and Lugu granite body. The Mopanshan body might be formed by partial melting of the lower crust and due to refusion of basic volcanic rocks. The magma source of the Moshaying and the Lugu bodies might be formed by partial melting of the upper crust. The Hongge-Ailanghe granites belonging to the Hercynian-Indosinian may be products of complex melting from the crust-mantle materials caused by the increase of temperature during rifting stage in the area. The Cida and Taihe alkaline granites belonging to the Hercynian-Indosinian might be derived from alkaline basaltic magma by differentiation. The Yenshanian Mianxi granite body might be derived from remelting of the upper crust during the closing stage of the rift valley. |
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| Keywords: | Panxi rift neutron activation analysis granitoid rock calc-alkaline granite alkaline granite |
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