LA–ICP–MS zircon U Pb dating, Lu Hf, Sm Nd geochronology and tectonic setting of the Mesoarchean mafic and felsic magmatic rocks in the Sangmelima granite-greenstone terrane, Ntem Complex (South Cameroon)
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DOI: 10.1016/j.lithos.2020.105702
Abstract: Abstract The Ntem Complex represents the northwestern margin of Congo Craton in southern Cameroon. It consists mainly of charnockites, TTG suites, potassic grantitoids, minor supracrustal and mafic rocks. The latter include gabbronorite enclave or sill,… read more here.
Keywords: ntem complex; icp zircon; mafic; cameroon ... See more keywords
LA-ICP-MS Zircon U-Pb Dating of Xinchong Syenogranite in Southwestern Fujian and Its Prospecting Significance
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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… read more here.
Keywords: icp zircon; xinchong syenogranite; syenogranite southwestern; dating xinchong ... See more keywords