金刚石中的高钾高氯包体和地幔交代作用  

HIGH-K AND HIGH-CI INCLUSIONS IN DIAMOND AND MANTLE METASOMATISM

作　　者：陈丰[1] 郭九皋[1] 王三学[1] 刘灿如 陈积昌 王智[3] 雷平[3] 

机构地区：[1]中国科学院地球化学研究所,贵阳550002 [2]山东地质七队,山东临沂276006 [3]贵州师范大学,贵阳550002

出　　处：《矿物学报》1992年第3期193-198,T002,共7页Acta Mineralogica Sinica

基　　金：国家自然科学基金

摘　　要：在山东产出的两颗八面体金刚石中发现高钾高氯包体(K 48～58wt％,Cl 37～48wt％)。与之伴生的有碳质物和硅酸盐矿物包体。高钾高氯包体及其共生组合代表了金刚石生长初期阶段陷获的上地幔液相物质。这些液相物质富H_2O、K、Cl和碳质,并联系着地幔交代作用,其中碳质物可能是金刚石生长的碳源。High-potasslum and high-chlorine inclusions have been found in two octahedral diamonds from Shandong Province (K:48～58wt.%, Cl:37～43wt.%). Coexisting with them are carbonaceous materials and silicate mineral inclusions. The high-potassium and high-chlorine inclusions and their paragenetic inclu sions can represent the liquid phase trapped during the primary stage of diamond growth from the upper mantle. Such liquid-phase material is rich in H_2O, K, C1 and carbonaceous material, and is associated with mantle metasomatism. This carbonaceous material is considered to be the carbon source for diamond growth.

关 键 词：金刚石 钾 氯 矿物包体 地幔 

分 类 号：P578.16[天文地球—矿物学]