云南东川大笑铅锌矿床矿物学特征与成矿温度

发布时间：2018-06-12 01:55

  本文选题：矿床地质特征 + 矿物学特征　； 参考：《地质通报》2017年06期

【摘要】：云南东川大笑铅锌矿床地处康滇地轴中段东沿的次一级隆起上,矿体赋存于白河厂背斜轴部南翼昆阳群望厂组的层间裂隙及羽状裂隙中,呈脉状、似层状产出。矿石矿物主要为方铅矿、银和少量闪锌矿、黄铁矿,脉石矿物主要为石英、方解石。矿石结构以自形-半自形-他形粒状结构、交代残余结构、变晶结构为主。矿石构造以浸染状、块状、条带状、脉状构造为主。成矿作用划分为热液成矿期与表生氧化期,其中热液成矿期划分为3个成矿阶段,第二成矿阶段为铅锌的主要成矿阶段,成矿温度为140~220℃,成矿时代为印支晚期。工业矿体的形成是在印支运动强大的作用力驱动下,成矿元素活化-混合-迁移-聚集成矿,矿床成因类型为沉积-改造热液矿床。
[Abstract]:The Dongchuan Kailai lead-zinc deposit in Yunnan is located on the secondary uplift along the east edge of the middle section of the Kangdian axis. The orebody occurs in the interlayer fissure and pinnatite fissure in the Wangchang formation of Kunyang Group in the south wing of the Baihe River back inclined axis. Ore minerals are mainly galena, silver and a small amount of sphalerite, pyrite, gangue minerals mainly quartz, calcite. The ore structure mainly consists of the granular structure, the metasomatic residual structure and the metamorphic structure. The ore structure is dominated by disseminated, massive, banded and veined structures. The metallogenic process is divided into hydrothermal metallogenic stage and supergenetic oxidation stage, in which the hydrothermal metallogenic stage is divided into three metallogenic stages, the second metallogenic stage is the main metallogenic stage of lead-zinc, the metallogenic temperature is 140 ~ 220 鈩，

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