| 牛英杰,孙宏岩,王居松,陈京玉,刘智勇,汪宽.老挝帕奔金矿成矿流体特征及成因类型[J].地质找矿论丛,2017,32(2):317-323 |
| 老挝帕奔金矿成矿流体特征及成因类型 |
| Study on features of ore-forming fluid and ore genesis of phapon gold deposit, Luangprobang, Laos |
| 投稿时间：2016-02-25 |
| DOI：10.6053/j.issn.1001-1412.2017.02.019 |
| 中文关键词: 帕奔金矿 成矿流体 碳、氧同位素 琅勃拉邦 老挝 |
| 英文关键词:Phapon gold deposit ore-forming fluid C-O isotope Laos |
| 基金项目:中央地质勘查基金和国外矿产资源勘查基金（编号：201211B00200006）资助 |
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| 中文摘要: |
| 帕奔金矿位于琅勃拉邦—黎府（泰国）成矿带的中部，矿床容矿围岩主要为灰岩，矿体严格受NNW—近SN向断裂控制。流体包裹体研究表明，含矿方解石中包裹体为液、气两相包裹体，以液相为主；成矿均一温度为164~252 ℃，平均盐度（w（NaCl，eq））为1.77%~7.64%，具中低温、低盐度特征；估算成矿压力为9.34×105~21.37×105 Pa，成矿深度为0.48~0.960 km；矿石中方解石的碳同位素δ（13CV-PDB）=-4.5×10-3~-5.2×10-3，氧同位素δ（18OV-SMOW）=20.3×10-3~21.1×10-3，方解石为流体与二叠系海相碳酸盐岩相互作用的产物。综合分析认为帕奔金矿为浅成中低温热液型金矿床。 |
| 英文摘要: |
| Phapon gold deposit is located at middle of LuangPrabang-Loei (Thailand) metallogenic belt and hostrd by limestone. Ore body is strictly controlled by limestone and ore bodies are controlled by NNW-near NS fault. Inclusion in Au-bearing alcite is liquid gas two-phase inclusion but dominated by fluid phase. The homogenization temperature is 164~252℃, average salinity(w(NaCl, eq))is 1.77%~7.64% characteristic of medium-low temperature and low salinity. metallogenic pressure is estimated at 9.34×105~21.37×105 Pa, metallogenic depth 0.48~0.960 km. δ(13CV-PDB)=-4.5×10-3~-5.2×10-3 and δ(18OV-SMOW)=20.3×10-3~21.1×10-3 of the calcite indicate that the calcite is the product of the interaction of liquid and Permian marine carbonate. Comprehensive analysis suggests that Phapon gold deposit is a shallow epithermal gold deposit. |
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