| 王一存.辽宁小佟家堡子金矿床成矿流体特征及来源讨论[J].地质与勘探,2015,51(1):79-87 |
| 辽宁小佟家堡子金矿床成矿流体特征及来源讨论 |
| Characteristics of hydrothermal superposition mineralization and fluid origins of the Xiaotongjiapuzi gold deposit in Liaoning Province |
| 投稿时间：2014-08-29 修订日期：2014-11-07 |
| DOI： |
| 中文关键词: 小佟家堡子金矿 热液叠加 流体包裹体 同位素 |
| 英文关键词: Xiaotongjiapuzi gold deposit, hydrothermal superposition, fluid inclusion, isotope |
| 基金项目:中国地质调查局地质调查项目(编号：1212011120156)资助 |
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| 中文摘要: |
| 小佟家堡子金矿床地处辽宁青城子矿田东南部，为一大型蚀变岩型矿床。矿床产于辽河群大石桥组三段白云石大理岩中，矿体呈层状、似层状产出。矿床由热液叠加改造作用形成，历经石英-黄铁矿、石英-碳酸盐两个阶段。流体包裹体研究表明，该矿床成矿流体属中低温、低盐NaCl-H2O型体系热液。碳氢氧同位素地球化学的研究表明，石英-黄铁矿阶段成矿流体氧同位素δ18O组成在15.2‰~18.4‰，碳同位素δ13CV-PDB组成在-9.4‰~-13.5‰，氢同位素δD组成为-87.7‰~-91.3‰，反应该阶段成矿流体主要来自岩浆水并伴有少量的大气降水。石英-碳酸盐阶段成矿流体氧同位素δ18O组成在13.6‰~15.5‰，碳同位素δ13CV-PDB组成在-7.4‰~-11.5‰，氢同位素组成δD为-89.3‰~-92.2‰，表明该阶段成矿流体主要来自大气降水。 |
| 英文摘要: |
| The Xiaotongjiapuzi gold deposit is located in the southeast of the Qingchengzi mine field of Liaoning Province, which is a large deposit of alerted rocks. This deposit formed in dolomite marble in the Dashiqiao Formation of Liaohe Group with layered or quasi-layered orebodies. It might be resulted from hydrothermal superimposition, experiencing quartz-pyrite stage and quartz-carbonate stage. The study of fluid inclusions indicate that the ore-forming fluids formed in hydrothermal superposition stage belongs to a low-temperature and low-salt NaCl-H2O hydrothermal regime. Carbon hydrogen and oxygen isotope geochemistry research shows that oxygen isotopic δ18O in ore-forming fluids ranges from 15.2‰ to 18.4‰, carbon isotope δ13CV-PDB varies from 9.4 to 13.5‰, and hydrogen isotope δD is 87.7‰ to 91.3‰, implying ore-forming fluids in Quartz-pyrite stage stemed from magmatic water with little atmospheric precipitation. Oxygen isotopic δ18O in ore-forming fluids ranges from 13.6‰ to 15.5‰, Carbon isotope δ13CV-PDB 7.4‰ to 11.5‰, and hydrogen isotope δD as 89.3‰ to 92.2‰, reflecting the ore-forming fluids in the quartz-carbonate stage mainly originated from atmospheric precipitation. |
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