云南鲁史取得找金突破  

Recent progress in gold exploration in the Lushi area,western Yunnan

作　　者：丛峰[1] 刘军平 黄晓明 肖高强 雍永源[1] 范文玉[1] 牟传龙[1] 王保弟[1] 

机构地区：[1]中国地质调查局成都地质调查中心,四川成都610081 [2]云南省地质调查院,云南昆明650216

出　　处：《沉积与特提斯地质》2017年第1期108-111,共4页Sedimentary Geology and Tethyan Geology

基　　金：中国地质调查局地质调查项目(121201010000150007;12120114060201);国家自然科学基金(41602044)资助

摘　　要：通过开展精准填图,在云南凤庆鲁史上三叠统三合洞组灰岩中发现金矿化体。并在黄铁矿化灰岩矿石的重砂矿物中发现自然金,呈不规则粒状和树枝状,粒度为0.04~0.2mm,成色在98%左右。另外,在方解石脉中也发现次圆状包裹金,金中含椭圆状黄铁矿包裹体。自然金的发现,表明金矿勘查取得了重大突破,有力支撑了找矿突破战略行动。In the field geological mapping, gold mineralization in the limestones and native gold in the placer minerals from the pyritized limestones are discovered in the Upper Triassic Sanhedong Formation in the Lushi area, Fengqing, western Yunnan. The gold grains vary in grain size from 0. 04 to 0. 2 mm, and are irregularly granular and dentritic in shape, with the fineness of about 9 8 % . In addition, there occurs as well in calcite veins subrounded inclusion-shaped gold, in which elliptical pyrite inclusions of gold are also recognized. The findings of the native gold have represented the notable advances in gold exploration and firmly support the strategic plan for gold exploration in China.

关 键 词：三合洞组 灰岩 自然金 黄铁矿 

分 类 号：P617[天文地球—矿床学]