摘要
古袍矿区的花岗斑岩出露于古袍复向斜西部扬起部位。围岩地层主要为寒武系水口群浅变质砂岩、粉砂岩、硅质岩及板岩、千脉岩和碳质页岩。花岗斑岩和花岗斑岩内的石英脉体中石英样品的^40Ar/^39Ar年龄数据表明,^40At/^39Ar坪年龄值在187.87±1.53Ma至244.88±2.48Ma之间,是加里东期花岗斑岩成岩作用之后,海西、印支或者燕山早期多期构造热液作用的产物。金矿化与花岗斑岩成岩后的多期次构造热液作用有关。主要受控于断层破碎带及其中充填的石英脉和黄铁矿化。
Granite porphyry stocks in the Gupao gold ore district are located in the west of Gupao synclinorium. The country rocks are mainly a suite of slightly metamorphosed sandstone, siltstone, siliceous rock, slate, phyllite and carbonaceous shale in Cambrian Shuikou Group. ^40Ar/^39Ar data of quartz from the granite porphyry and from the quartz veins in the granite porphyry range from 187.87 ± 1.53 Ma to 244.88 ± 2.48 Ma, indicating products of structural hydrothermal fluids of Late Hercynian, Indosinian or Early Yanshanian periods. Gold mineralization is related to the activity of the multi-stage structural hydrothermal fluids after the intrusion of the granite porphyry, and controlled by the quartz veins and pyritization that fill the fault zones.
出处
《地球学报》
EI
CAS
CSCD
北大核心
2005年第B09期156-159,共4页
Acta Geoscientica Sinica
基金
本文由广西自然科学基金项目“桂东南火山期后构造-热液作用与金矿成矿作用研究”(编号:桂科回0342025)资助.