摘要
目的针对吉林白石砬子白钨矿矿床的发现,研究矿床成因,建立找矿标志,为深入研究矿床地质特征和区域找矿提供参考依据。方法通过对区域地质背景、矿区(床)地质特征和矿体特征的分析,结合前人研究成果,讨论该矿床的成因和找矿标志。结果白石砬子白钨矿矿床位于敦-密断裂带南东侧的罗子沟-密江SN向金多金属成矿带北端。该矿区共发现2条白钨矿体,矿体以脉状、扁豆体状产于黑云母斜长花岗岩、大理岩及矽卡岩中。其矿化分为4个成矿阶段,即矽卡岩阶段、石英-硫化物阶段、低温热液阶段、表生阶段。1∶50 000水系沉积物测量及白钨矿重砂异常,可大致显示钨矿找矿的范围,1∶10 000土壤地球化学测量钨异常可指示出钨矿体的赋存部位,青龙村群大理岩与黑云母斜长花岗岩接触面是白钨矿体赋存的有利层位,NE向构造带是石榴石矽卡岩型白钨矿的主要赋存空间。结论成矿过程中,青龙村群大理岩是矽卡岩和白钨矿形成所需钙质的主要来源,而花岗质岩浆是钨等金属成矿组分的主要提供者,矿床成因类型属中高温接触交代矽卡岩型白钨矿矿床。综合研究认为,该矿区深部及外围具有较大的成矿潜力和找矿远景。
Objective By finding Baishilazi scheelite deposit in Jilin and study of the genesis of ore deposit,ore-prospecting criteria were established to provide some references for the further study of ore deposits and regional prospecting.Methods Based on the analysis of regional geological background,geological features of mining area(bed)and ore body,combining the previous research results,the genesis of the ore deposit and prospecting marks were discussed.Results The Baishilazi scheelit deposit in DunMi fault zone was located in northern jiangnan north to gold polymetallic metallogenic belt of southeast Luozigou-Mijiang fracture zone.In the mining area 2scheelite ore body were found.They were vein and lenticular.The Baishilazi scheelit deposit was located in congtacting zone between the marble of the late Palaeozoic Qinglongcun Group and the Hercynian biotite granite.The ore was classified as 4ore-forming stages,namely,the skarn stage,quartz-sulfide stage,low temperature hydrothermal stage and supergene stage.By 1∶50 000 stream sediment survey the white tungsten heavy sand was unusual,suggesting the rough range of tungsten ore prospecting.1∶10 000 soil geochemical survey of tungsten anomalies indicated the occurrence position of the tungsten ore body.The contact area of Tsing lung village group of marble and biotite plagioclase granite was favorable for scheelite ore body occurrence horizon,and north east to structural belt was main occurrence space of garnet skarn type scheelite.Conclusion In the process of mineralization,group of marble in tsing lung village is the major source of calcium for skarn,scheelite ore formation,and the granitic magma is supposed to be the main provider of tungsten metal ore-forming components.Geological features indicate that the Baishilazi scheelite belongs to the skarn deposit.Mining area and the periphery has great ore-forming potential and prospecting perspective.
出处
《河北北方学院学报（自然科学版）》
2016年第11期30-34,共5页
Journal of Hebei North University:Natural Science Edition
关键词
地质特征
矿床成因
找矿标志
白钨矿
白石砬子
geological features
ore-genesis
prospecting criteria
scheelite deposit
Baishilazi
