Classification and Source Materials of Continental Crust Transformation Series Granitoids in South China
Classification and Source Materials of Continental Crust Transformation Series Granitoids in South China
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DOI：
10.1111/j.1755-6724.1990.mp3003005.x
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发表时间：
2009-05
影响因子：
3.3
通讯作者：
L. Changshi;Zhu Jinchu;Shen Weizhou;Xu Shi-jin
中科院分区：
文献类型：
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作者：
L. Changshi;Zhu Jinchu;Shen Weizhou;Xu Shi-jin
华南陆壳改造系列花岗岩类可分为三种类型：（1）同造山混合岩浆型，（2）非造山陆壳深熔型，（3）同碰撞型。根据Sr、Nd同位素测定结果，采用壳幔二元混合模拟方法计算了3类花岗岩类的源区物质组成。计算结果表明，第一类花岗岩类由78.6-89.7%的上地壳端元和15.0-10.3%的亏损地幔端元组成，第二类花岗岩类由63.7%的上地壳端元和36.3%的亏损地幔端元组成，第三类花岗岩类由100%的上地壳端元组成。因此，三种类型花岗岩类的源区物质组成均以上地壳端元为主。
The granitoids of the continental crust transformation series in South China may be divided into three types: (1) synorogenic migmatic and magmatic type, (2) anorogenic continental crust anatexis type, and (3) syncollision type. Based on the results of Sr and Nd isotopic determinations, the source material composition of the three types of granitoids is calculated with crust-mantle binary mixing simulation. The calculations indicate that the granitoids of the first type consist of 78.6-89.7% upper crust endmember materials and 15.0-10.3% depleted mantle endmember materials, the granitoids of the second type are composed of 63.7% upper crust endmember materials and 36.3% depleted mantle endmember materials, and those of the third type 100% upper crust endmember materials. Hence, the source material composition of the granitoids of all the three types is dominated by upper crust endmembers.