摘要
爬奔金矿位于丰沙里-帕府(泰国)中生代拗陷带与琅勃拉邦-梨府(泰国)华力西褶皱带的交接部位,属于岩浆期后低温热液型矿床。文章通过对爬奔金矿床含金方解石氢、氧、碳同位素组成和稀土元素地球化学特征的研究,探讨成矿溶液中水、碳来源以及成矿溶液的演化问题。研究表明,热液流体来源主要是岩浆水与地层封存的古大气降水。矿石中方解石的碳、氧同位素^(13)C_(V-PDB)(‰)值分布在-4.5^-5.2之间,^(18)O_(V-SMOW)(‰)值分布于20.0~20.8之间,表明含金方解石矿物为热液流体与二叠纪海相碳酸盐岩相互作用的产物。
The PHAPUN gold deposit, located at the intersection site of the Fengshali-Pafu（Thailand） Mesozoic depression belt and Luangprabang（Laos）- Lifu（Thailand） Hercynian fold belt, belongs to post- magmatic epithermal type gold deposit. Through a detailed study on characteristics of hydrogen, oxygen, carbon isotopic compositions and the REE distribution patterns of ore-bearing calcites in PHAPUN gold deposit, we try to figure out the resources of H_2O and C in the ore-forming fluids and evolution of ore-forming fluids. The results reveal that oreforming fluids are mainly derived from magmatic water and ancient meteoric water. The C and O isotopic compositions of The （13）C_（V-PDB）（‰） and （18）O_（V-SMOW）（‰） of calcites in ores range from-4.5 --5.2 and 20.0 - 20.8, respectively,which show that ore-bearing calcites were the interacted products of hydrothermal fluids and the Permian marine carbonate rocks.
出处
《地质调查与研究》
2015年第4期277-283,共7页
Geological Survey and Research
基金
中央地质勘查基金
国外矿产资源勘查基金(201211B00200006)
