| 随枣北部地区燕山期花岗岩体构造环境探讨 |
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| 引用本文： | 王春梅,李丰硕,周永涛,蔡丽娟.随枣北部地区燕山期花岗岩体构造环境探讨[J].国土资源情报,2014(4):51-55. |
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| 作者姓名： | 王春梅 李丰硕 周永涛 蔡丽娟 |
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| 作者单位： | 湖北省鄂西北地质矿产调查所; |
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| 摘 要： | 随枣北部地区发育大量燕山期花岗岩体,以新黄断裂为界,南西侧主要为二长花岗岩,北东侧为钾长花岗岩。主要造岩矿物为钾长石、斜长石、黑云母和石英。岩浆岩总体酸度较高,高铝、相对富钾,以准铝质到过铝质钙碱性岩为主,属高钾一钾玄质系列。根据岩石化学参数判别为造山晚期花岗岩,属构造转折时期的岩石组合;微量元素蛛网图识别为同碰撞花岗岩和碰撞后花岗岩;微量元素对判别为同碰撞花岗岩（syn-COLG）和火山弧花岗岩（VAG）;采用巴尔巴林构造环境识别为富钾钙碱性花岗岩类（KCG）;Maniar和Piccoli构造环境判别属造山环境下的花岗岩。通过综合评判,结合区域大地构造演化规律,其构造环境应属于后碰撞阶段,地球动力学环境应为构造体制转换期。
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| 关 键 词： | 花岗岩 微量元素 构造环境 岩体 |
A Survey on the Tectonic Environment of Granitic Pluton in Yanshanian in the Northern Part of Suizhou and Zaoyang |
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| WANG Chunmei;LI Fengshuo;ZHOU Yongtao;CAI Lijuan.A Survey on the Tectonic Environment of Granitic Pluton in Yanshanian in the Northern Part of Suizhou and Zaoyang[J].Land and Resources Information,2014(4):51-55. |
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| Authors: | WANG Chunmei;LI Fengshuo;ZHOU Yongtao;CAI Lijuan |
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| Institution: | WANG Chunmei;LI Fengshuo;ZHOU Yongtao;CAI Lijuan ( Geology and Minerals Survey Bureau of Northwest Hubei province, Xiangyang, Hubei 441002, China) |
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| Abstract: | The northern part of Suizhou and Zaoyang boasts abundant granitic pluton in Yanshanian with the Xincheng- Huangpi fault zone as the boundary.The southeast part of it have monzonitic granite ,and the northeast part of it have K-feldspar granite. The main kinds of rock-forming minerals are potassium feldspar, plagioclase, biotite and quartz. Magmatic with higher overall acidity, aluminum, relatively rich in potassium, the main representatives are peraluminous and metaluminous calc-alkaline rocks, and belongs to a high-K shoshonitic series. Discrimination based on chemical parameters of the rock late orogenic granite rock is a combination of tectonic transition period; spider diagram identified as granite and collision after collision with granite; trace elements of discrimination for the same collision granites （syn- COLG） and volcanic arc granites （VAG）; using Barr Bahrain tectonic environment identified as K-rich calc-alkaline granitoids （KCG）; Maniar and Piccoli tectonic discrimination is a granite orogenic environment. Through comprehensive evaluation, combined with regional tectonic evolution, its tectonic setting should belong to post-collisional stage, and its geodynamic environment should be tectonic regime transition period. |
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| Keywords: | Granite Trace Elements Tectonic Environment Intrusive mass |
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