| 詹勇,陈德稳,马林霄.湖南大叶塘金矿流体包裹体研究和成因探讨[J].矿产勘查,2018,9(3):324-332 |
| 湖南大叶塘金矿流体包裹体研究和成因探讨 |
| Study on fluid inclusions and genesis discussion of Dayetang gold deposit in Hunan |
| 投稿时间：2017-11-07 |
| DOI： |
| 中文关键词: 大叶塘金矿 流体包裹体 氢氧同位素 浅成热液型金矿 湖南 |
| 英文关键词: Dayetang gold deposit, fluid inclusion, hydrogen and oxygen isotope,epithermal type gold deposit, Xuefeng Mountain |
| 基金项目: |
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| 摘要点击次数: 1729 |
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| 中文摘要: |
| 湖南省会同县大叶塘金矿是湘西雪峰山地区重要的金矿床之一,目前已探明黄金资源量约30 t。对大叶塘金矿流体包裹体的研究获得成矿流体物理化学参数:均一温度主要集中在160～200℃；盐度变化范围很宽,为0.18%~ 18.10% NaCleq,以1.73%~14.63% NaCleq居多；密度为0.72~1.05 g·cm-3,平均0.93 g·cm-3。据此估算,大叶塘金矿的成矿压力为7.61~32.57 Mpa,成矿深度为0.76~3.26 km(平均1.9 km)。石英流体包裹体成分特征及氢氧同位素特征显示,大叶塘金矿成矿流体早期来源于变质水,中后期有大气降水的参与并占主导,成矿流体具混合流体特征。成矿作用阶段,矿区内加里东晚期形成张性断裂为含矿热液集中和金的沉淀提供了良好的容矿构造场所,以大气降水为主形成的含矿热液活动占主导作用。大叶塘金矿的成因类型为低温浅成热液型。 |
| 英文摘要: |
| Dayetang gold deposit is one of the important gold deposits in Xuefeng Mountain western Hunan Province. The gold resources having been measured is about 30t. According to the recent research of fluid inclusions in Dayetang gold deposit, physical and chemical parameters of metallogenic fluids were obtained:homogeneous temperatures are mainly concentrated at 160-200℃; a wide range of salinity, 0.18~18.10 wt% (NaCl), mostly 1.73~14.63wt%; density is 0.72~1.05g/cm3, an average of 0.93g/cm3. According to estimates, the ore-forming pressure is as 7.61~32.57Mpa, and ore-forming depth is as 0.76~3.26km (average 1.9km). The composition characteristics of fluid inclusion and characteristics of hydrogen and oxygen isotope show that ore-forming fluid is derived from metamorphic water early,and from atmospheric precipitation in the middle and late period which plays a dominant role in this period, and ore-forming fluid has mixed fluid features. Metallogenic stage,extensional faults formed in the late caledonian in the property are a provides a good structure for the ore-bearing hydrothermal concentration and precipitation of gold; ore-bearing hydrothermal activities mainly from atmospheric precipitation take a dominant role. Dayetang gold deposit belongs to epithermal type gold deposits. |
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