摘要
马岭岩体是大埠岩体的一部分,大埠岩体已发现有铀、钨（锡）矿产。地球化学特征显示马岭花岗岩属陆内S型花岗岩,呈钙碱性、过铝质,具富硅[w（SiO2）为73.73%-75.73%]、略富碱[w（K2O＋Na2O）为7.63%-8.63%]、高钾[w（K2O）为3.99%-5.60%]和低钙[w（CaO）为0.239%-0.662%]特点,铝饱和指数A/NCK为1.04-1.20。稀土元素配分曲线呈LREE富集、HREE亏损,具强负铕异常的＂V＂字型,大离子亲石元素富集,Ba、Sr、P、Ti亏损,Al2O3/TiO2比值〉100,低Sr高Yb的特征表明马岭花岗岩体形成是古老陆壳物质部分熔融的产物,原岩部分熔融的温度〈875℃,岩体形成时的压力较低、深度较浅。结合华南成矿花岗岩地球化学特征分析,马岭花岗岩体具铀、钨（锡）矿成矿潜力。
The Maling intrusion is a part of the Dabu intrusion,and U,W（Sn）minerals have been found in Dabu intrusion.Geochemistry analyses show that the Maling granite belongs to the intercontinental S-type granite,with silicon-rich（73.73%-75.73%）,slightly alkaline-rich（K2O＋Na2O=7.63%-8.63%）,high K2O（3.99%-5.60%）,Low CaO（0.239%-0.662%）,and peraluminous（A/NCK=1.04-1.20）。REE are characterized by rich LREE,depletive HREE,and obvious negative Eu anomalies.In the granite,the elements Rb,W,Th,U,K and Pb are rich while Ba,Sr,P and Ti are depleted,the Sr is low,the Yb is high,and the ratio of Al2O3/TiO2is greater than 100.The geochemical data indicate that the Maling intrusion was most likely generated by partial melting of the old crust material.According to the geochemical characteristics of mineralized granites in South China,Maling intrusion has a good prospecting metallogenetic potentiality for U and W（Sn）.
出处
《地质科技情报》
CAS
CSCD
北大核心
2014年第4期19-23,30,共6页
Geological Science and Technology Information
基金
中国核工业地质局科研项目(ZH2011270-01)
关键词
地球化学
岩石成因
找矿意义
马岭岩体
江西
geochemistry
petrogenesis
prospecting significance
Maling intrusion
Jiangxi
