南岭东段桃源地区花岗岩地球化学特征及其成因研究  

Study on the Geochemical Characteristics and Genesis of Granite in the Taoyuan Area of the Eastern Section of Nanling

作　　者：彭渤洋 李海燕 陆庆德 PENG Boyang;LI Haiyan;LU Qingde(Research Institute No.290,CNNC,Guangdong Provincial Key Laboratory of Environmental Protection(Nuclear Radiation Tracking Research),Shaoguan 512029,China)

机构地区：[1]核工业二九O研究所广东省环境保护重点实验室(核辐射追踪研究),广东韶关512029

出　　处：《中国资源综合利用》2025年第3期77-79,共3页China Resources Comprehensive Utilization

摘　　要：桃源地区位于华夏地块南部,南岭构造带东段,长塘盆地西缘,大坝岩体东部。在大地构造位置上,处于闽赣后加里东隆起与湘桂粤北海西—印支坳陷的刚柔地块结合带附近。区内铀矿化发育,具有良好的铀成矿地质条件。通过分析桃源地区花岗岩的元素地球化学特征,认为桃源地区花岗岩为A型花岗岩A_(1)亚类,呈亚碱性,富Si,贫Sr、Eu、Ba、P、Ti等特征,具有高Ga/Al、TFe/Mg值,其形成于燕山晚期后造山运动中的拉张伸展构造环境。Taoyuan area is located in the south of the Cathaysia block,the eastern section of the the Nanling Mountain structural belt,the western edge of Changtang Basin,and the eastern part of the dam rock mass.In terms of tectonic location,it is located near the junction zone of the Gangrou Block between the Fujian-Jiangxi Post Caledonian Uplift and the Hunan-Guangxi-North Guangdong Haixi-Indochina Depression.The uranium mineralization in the area is well-developed and has favorable geological conditions for uranium mineralization.By analyzing the elemental geochemical characteristics of the granite in the Taoyuan area,it is believed that the granite in the Taoyuan area belongs to the A1 subclass of A-type granite,which is sub alkaline,rich in Si,poor in Sr,Eu,Ba,P,Ti,and has high Ga/Al and TFe/Mg values.It was formed in a extensional tectonic environment during the late Yanshan orogeny.

关 键 词：元素地球化学特征 A型花岗岩 桃源地区 南岭东段 

分 类 号：P595[天文地球—地球化学]