花岗岩型铀矿成矿基本地质要素及气体找矿效果讨论  

Discussion on Geologic Factors of Metallization of Granites Uranium Deposits and Gas Prospecting

作　　者：刘正义[1] 徐浩[1] 杜乐天[1] 刘权[1] 刘红旭[1] 刘章月[1] 

机构地区：[1]核工业北京地质研究院中核集团铀资源勘查与评价技术重点实验室,北京100029

出　　处：《东华理工大学学报（自然科学版）》2011年第4期332-338,共7页Journal of East China University of Technology(Natural Science)

摘　　要：在对岩体内带型、岩体外带型、上叠盆地型大量铀矿床野外调查和室内显微镜下鉴定的基础上,初步综合花岗岩铀成矿的基本地质要素,包括:含矿断裂和控矿断裂的控矿和含矿性能,主矿体赋存标高,碳酸盐地层和碳酸盐蚀变的特殊意义等方面的认识。特别对铀矿床控矿或含矿断裂进行野外气体测量,结果表明在断层上盘或靠近断层破裂面部位见有H2,CO增高和O2减低的现象,显示了深部成矿的可能和构造热液活动迹象,并具有气体找矿意义和找矿应用前景。文章最后指出需要重新评价和进一步工作的矿床,提出若干个具找矿远景的矿床。Based on field investigation and microscope observation of some uranium deposits of rock mass external zone, rock mass internal zone superposed basin, the basic factors of metallization of granites uranium deposits are analyzed comprehensively. This study presents out some new understanding, including as the identity of ore-bearing fracture and ore-controlling fracture, regularity of elevation of main ore-bodies occurrence, indispensable property of carbonation, the generality and particularity of hydrothermal alteration types. Gases in ore-controlling fractures are measured. The results show that the contents of H2 and CO are increasing and contents of O2 are decreasing in rupture plane of upper plate of fault. This phenomenon shows possibility of deep mineralization, evidence of hydrothermal activities. The deposit need to be revaluated and more work, and several deposits with mineralization potential are proposed.

关 键 词：花岗岩型铀矿 成矿地质要素 气体测量 气体找矿 

分 类 号：P619.14[天文地球—矿床学]