摘要
下庄矿田是华南重要的热液铀矿产区,区内控矿条件复杂。研究选取下庄矿田部分矿床内热液碳酸盐样品并测定其C,O同位素组成:测定矿田北部的1δ3CPDB为-7.6‰^-8.4‰,1δ8CSMOW为12.1‰~13.2‰,而矿田南部测波动范围较大1δ3CPDB则为-3.1‰^-8.5‰,δOSMOW为10.4‰~14.1‰。进一步研究结果表明,成矿流体中矿化剂ΣCO2主要来源于中新生代与区域深大断裂有关的幔源脱气作用,同时伴有壳源有机碳来源;成矿同时期伴随的强烈流体脱气(CO2)作用对矿质沉淀至关重要。
The Xiazhuang uranium ore field is one of the most important ore fields with complex mineralization conditions. In this study, some carbonate samples in deposits are used to analyse carbon and oxygen isotopic composition. It is indicated that the mineralizer mainly comes from mantle degassing related to the regional deep faults,and part of carbon comes from organic matter in the crust. Strong fluid degassing occurred in uranium mineralization plays an important role in precipitation of pitchblende.
出处
《矿物岩石》
CAS
CSCD
北大核心
2006年第3期71-76,共6页
Mineralogy and Petrology
基金
中国科学院知识创新工程重要方向项目(KZCX3-SW-125)
国家杰出青年科学基金(49925309)
关键词
下庄铀矿田
碳酸盐
C
O同位素
矿化剂
Xiazhuang uranium ore field icarbonate
carbon and oxygen isotopes imineralizer
