云南鲁史取得找金突破

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

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。

Abstract: 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 98%. 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.