岩矿测试2018，Vol.37Issue(3)：336-345,10.DOI:10.15898/j.cnki.11-2131/td.201712140193
电子探针和微区X射线衍射研究陕西镇安钨-铍多金属矿床中祖母绿级绿柱石
Study on Emerald-level Beryl from the Zhen’an W-Be Polymetallic Deposit in Shaanxi Province by Electron Probe Microanalyzer and Micro X-ray Diffractometer
摘要
Abstract
BACKGROUND:A new deposit type with a scheelite-beryl-molybdenite assemblage was first discovered in the Zhen’an area of Shaanxi Province. OBJECTIVES:The research on chromatic mechanism and genetic mechanism of emerald was carried out. METHODS:Combined with the geological survey,Electron Microprobe and in-situ Micro X-ray Diffractomer were used to conduct mineral research. RESULTS:The emerald mainly occurs in the quartz (calcite)veins as euhedral crystal and is associated with scheelite.Both the core and rim of the emerald with high V2O3contents of 0.64% -0.98% and 1.04% -1.42%,respectively,show an increased V2O3trend from core to rim.Diffraction data show that the emerald is normal beryl and has two kinds of isomorphous substitution mechanism,Al→Me2+and Be→Li.Vanadium is the main coloring element of emerald and was mainly derived from carbonaceous slate,mica schist,and dolomitic marble,whereas Be,Si and Al were derived from deep acidic igneous rocks. CONCLUSIONS:The discovery provides basic geological data for the comprehensive development and utilization of tungsten and antimony mineral resources in the deposit,and indicates new prospecting directions for continued searching for rare metal deposits in the region and deep areas of the South Qinling.关键词
祖母绿/矿物学/致色机理/W-Be多金属/南秦岭Key words
emerald/mineralogy/coloring mechanism/W-Be polymetallics/Southern Qinling分类
天文与地球科学引用本文复制引用
代鸿章,王登红,刘丽君,黄凡,王成辉..电子探针和微区X射线衍射研究陕西镇安钨-铍多金属矿床中祖母绿级绿柱石[J].岩矿测试,2018,37(3):336-345,10.基金项目
国家重点研发计划专项"锂能源金属矿产基地深部探测技术示范"项目(2017YFC0602700) （2017YFC0602700）
中国博士后科学基金资助项目"四川甲基卡矿区锂辉石、绿柱石原位微区矿物学研究"(2017M610960) （2017M610960）
中国地质调查局"矿产地质志"项目(DD20160346) （DD20160346）
中国地质调查局"华南重点矿集区稀有稀散和稀土矿产调查"项目(DD20160056) （DD20160056）
