玲珑花岗质杂岩体形成的物理化学条件及其地质意义
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引用本文:林文蔚,殷秀兰.1998.玲珑花岗质杂岩体形成的物理化学条件及其地质意义[J].地球学报,19(1):40-49.
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作者单位
林文蔚 中国地质科学院矿床地质研究所 
殷秀兰 中国地质科学院地质力学研究所 
中文摘要:胶东西北部是我国金矿的重要产区,招掖金矿带的形成与玲珑花岗质杂岩有密切的成因联系。玲珑花岗质杂岩是一个多期次形成的复式岩体,最终定位于燕山期。它主要由云山、崔召、玲珑片麻状花岗岩、郭家店(型)、郭家岭(型)岩体组成。本文研究了上述诸岩体形成的T、p、fO2、fH2、pH2O条件及熔浆中的含水量。通过玲珑花岗质杂岩形成的物理化学条件研究得出:玲珑花岗质杂岩即不是区域变质作用中混合岩化的产物,也不是幔源岩浆分异、冷凝的产物,而是由太古宙、元古宙变质岩重熔交代所形成的原地半原地型花岗质杂岩体。玲珑花岗质杂岩,尤其是郭家岭型花岗岩对本区金矿的形成具有重要意义。重熔岩浆作用,热驱动下流体循环和含矿热液中水的浓缩(收缩),是胶东金矿得以形成的主要原因。
中文关键词:玲珑花岗质杂岩  金矿  物理化学条件  水浓缩作用  胶东
 
The Forming Physicochemical Conditions of Linglong Granitic Complex and Its Geological Significance
Abstract:The northwestern part of Jiaodong area is an important gold metallogenetic belt in China.Its formation is closely related to Linglong granitic complex.Linglong granitic complex is a polyphase composite rock body,emplaced finally in Yenshan stage.The granitic complex body is mainly composed of Yunshan admellite ,Cuizhao admellite,Linglong gneissic granite,Guojiadian granite and Guojialing granodiorite. The T,p , f O 2 , f H 2 , p H 2O and water content in melt of above_mentioned rock bodies have been studied in this paper.By means of study of physicochemical conditions of Linglong granitic complex,the conclusion can be drawed out as follows:Linglong granitic complex appears to be neither product of migmatization in regional metamorphism nor product of differentiation by crystallization of magma derived from mantle .It is an autochthonous_subautochthonous granitic complex by means of metasomasis and remelting of metamorphic rocks probably Archean. Linglong granitic complex,particularly Guojialing granodiorite bodies have great significance to mineralization of gold. Remelting magmatism,hydrothermal circulation drived by heat from granitic bodies and concentration of water in thermal fluid may be the most important factors to mineralization of gold.
keywords:Linglong granite  gold deposit  physicochemical condition  concentration of water Jiaodong
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