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Published in 2017 at "Advances in Geosciences"
DOI: 10.12677/ag.2017.73038
Abstract: 新冲正长花岗岩位于胡坊复式岩体东南缘,总体呈南西向展布,出露面积大于200 km2,岩性为肉红色斑状粗粒正长花岗岩。本文对新冲正长花岗岩样品进行了LA-ICP-MS锆石U-Pb测年,获得206U/236Pb加权平均年龄为222.0 ± 1.0 Ma (n = 24,MSWD = 0.53),表明新冲正长花岗岩侵位时代为晚三叠世,是印支运动晚期岩浆活动的产物。通过对比,新冲正长花岗岩的侵位时代晚于志留纪侵位的胡坊花岗岩,表明胡坊复式花岗岩为志留纪和三叠纪岩浆活动的产物。对新冲正长花岗岩稀土元素分析,显示新冲正长花岗岩稀土总量较高,富集轻稀土元素La、Ce,具有寻找离子吸附型稀土矿的良好找矿前景,这对闽西南地区岩浆演化和找矿提供了重要新资料。 The Xinchong syenogranite is located at the southeastern portion of the Hufang Compound granite, which is mainly composed of meat red patchy, coarse-grained syenogranite, generally…
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Keywords:
icp zircon;
xinchong syenogranite;
syenogranite southwestern;
dating xinchong ... See more keywords