《黄金》杂志(月刊) 第39卷 总第417期
2018年09月 第09期
目次
黄金地质
  • 青海省苏海图金矿床地质特征及控矿因素……拜红奎,刘久波,白生皓
  • 摘 要:苏海图金矿床位于东昆仑成矿带中部东昆仑南坡俯冲碰撞杂岩带内,该区为青海省多金属成矿密集区,金、铜、锑等矿床(点)密布,成矿地质条件优越。在综合分析区域地质概况和矿床地质特征的基础上,探讨了控矿因素和矿床成因。研究表明,金矿(化)体主要赋存于奥陶—志留系纳赤台群变余长石石英砂岩和构造角砾岩中,且严格受近EW向、NW向断裂及蚀变破碎带控制;沿次级断裂或裂隙侵入的花岗斑岩脉及石英脉为寻找金矿有利地质体;黄铁矿化、褐铁矿化和硅化等围岩蚀变与金成矿关系密切,是重要的找矿标志。矿床成因类型为热液型,工业类型为蚀变岩型和石英脉型。

    Geologicalcharacteristics and ore-controlling factors of Suhaitu Gold Deposit,QinghaiProvince……Bai Hongkui,Liu Jiubo,Bai Shenghao

    AbstractSuhaitu Gold Deposit is located in subduction-collisioncomplex zone on the southern slopes that sit in the central part of the EastKunlun metallogenic belt.This area was polymetallic mineralizationconcentration area in Qinghai Province,where gold,copper and antimonydeposits(points)are densely distributed and the ore-forming geologicalconditions are superior.Based on comprehensive analysis of the regionalgeological situation and geological features,the ore-controlling factors andthe deposit genesis were analyzed.The results show that the gold ore bodies aremainly located in blastospathic quartz sandstone and tectonic breccia ofOrdovician-Silurian Nakchitai Group,and strictly controlled by near EW-trendingand NW-trending fractures and alteration zones; the intrusive granite veins andquartz veins along secondary faults or fissures were favorable for golddeposits; the surrounding rock alteration,such as pyritization,ferritizationand silicification,were closely related to gold mineralization and thereforeimportant prospecting indicators.The genetic type of the deposit belongs tohydrothermal deposit and the industrial type is tectonic altered rock type andquartz vein type.

    Keywords:Suhaitu Gold Deposit; geological features; ore-controlling factors; depositgenesis; Nachitai Group

  • 关键词:苏海图金矿床;地质特征;控矿因素;矿床成因;纳赤台群
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