西华山花岗岩中的碳质物  

Carbonaceous matter in the Xihuashan granite

作　　者：曾贻善[1] 朱永峰[1] 刘家齐[2] 

机构地区：[1]北京大学地质学系,北京100871 [2]宜昌地质矿产研究所,湖北宜昌443003

出　　处：《华南地质与矿产》2002年第3期44-49,共6页Geology and Mineral Resources of South China

基　　金：国家自然科学基金项目 (4 9673 193和 40 0 73 2 0 5 )

摘　　要：为了验证S型花岗岩中存在有机质残余的可能性 ,利用分离沉积岩中干酪根的酸溶法处理赣南西华山的花岗岩样品。酸不溶残渣的光学显微镜、X射线衍射分析和扫描电子显微镜鉴定表明 ,不溶残渣中有少量黑色含碳的物质。激光拉曼探针和显微富利叶变换红外光谱研究显示 ,残渣中含碳的物质是成分和结构不均匀的碳质物 (carbonaceousmatter)。西华山花岗岩中含有碳质物意味着该花岗岩浆源于沉积物 ,而且结晶温度比较低、压力较高 ,这与地质地球化学研究成果吻合。In order to verify the presence of residual organic matter in some S type granites,an acid dissolution method for isolating kerogen from sedimentary rocks was employed to deal with samples from the Xihuashan granite body,Jiangxi,and a little black carbonaceous matters were identified with Optical,XRD and SEM/EDAX analyses in the acid insoluble residue. LMR and micro FTIR testings showed that the residue contained a small amount of carbonaceous matter(CM) which is heterogeneous in composition and structural state. The occurrence of CM in the Xihuashan granite implies that this granitic magma was derived from sediments and crystallized at relatively lower temperatures and high pressures,which is consistent with geological and geochemical studies of the Xihuashan granite.

关 键 词：S型花岗岩 碳质物 西华山 光学显微镜 X射线衍射分析 

分 类 号：P588.121[天文地球—岩石学]