| 曾子华.内蒙古牙克石岩山钼矿床矿石Re-Os和相关岩浆岩锆石U-Pb年龄测定[J].地质与勘探,2015,51(1):45-52 |
| 内蒙古牙克石岩山钼矿床矿石Re-Os和相关岩浆岩锆石U-Pb年龄测定 |
| Re-Os dating of the molybdenum deposit and zircon U-pb ages of related magmatic rocks in the Yanshan area, Yakeshi, Inner Mongolia |
| 投稿时间：2014-09-19 修订日期：2014-12-16 |
| DOI： |
| 中文关键词: 地球化学 钼矿床 锆石U-Pb定年 Re-Os同位素定年 牙克石 内蒙古 |
| 英文关键词: geochemistry, molybdenum desposit, zircon U-pb age, Re-Os isotopic age, Yakeshi |
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| 中文摘要: |
| 近年来，在内蒙古牙克石地区，发现了岩山中型钼矿床。赋矿围岩以元古界兴华渡口群为主，其次为燕山期花岗斑岩隐伏岩体。该岩体特征自边部至中心，大致呈石英斑岩-花岗斑岩-花岗闪长岩相变的特点，U-pb年龄分别为124±1Ma、127±2Ma、124±1Ma。辉钼矿主要以石英（碳酸盐-萤石）辉钼矿脉，长石石英辉钼矿脉、碳酸盐（-萤石）辉钼矿脉的形式存在于围岩中，切穿岩体与地层的接触带。以兴华渡口群为围岩的辉钼矿Re-Os年龄为125.2±1.7 Ma，以花岗斑岩为围岩的辉钼矿Re-Os年龄为126.6±1.8Ma，长石石英脉中辉钼矿Re-Os年龄为125.3±1.8Ma。根据矿体与围岩的相互关系及年龄测定结果，成矿无论从时间上和空间上与燕山期花岗斑岩的侵入密切相关，热液充填活动明显，属岩浆热液型矿床。 |
| 英文摘要: |
| In recent years, a moderiate-size molybdenum deposit was discovered in the Yanshan area,Yakeshi, Inner Mongolia. Its host rocks are primarily the Proterozoic Xinhuadukou Group, and secondly the concealed rock of the Yanshan-period granite porphyry.These rocks exhibit the characteristics of quartz porphyry and granite porphyry - granite diorite phase transition from the edge to the center with U-pb ages 124±1Ma, 127±2Ma, and 124±1Ma, respectively. Molybdenite ore appears in the quartz （carbonate- fluorite） vein, feldspar quartz vein, and carbonate(fluorite) vein, which cut through the contact zone between the rock and strata. The Xinghuadukou Group molybdenite Re-Os age for the surrounding rock is 125.2±1.7 Ma, the granite-porphyry molybdenite Re-Os age of surrounding rock is 126.6±1.8Ma, and feldspar quartz veins molybdenite Re-Os age is 125.3±1.8Ma. According to the dating results and relationship between the ore body and surrounding rock, mineralization was closely related to the Yanshan-period granite porphyry in both time and space. The obvious hydrothermal filling activity suggests the type of the magmatic hydrothermal deposit. |
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