江西相山矿田典型铀矿床流体包裹体特征及意义
摘要
对江西相山铀矿田3个典型铀矿床邹家山、横涧和沙洲矿床铀矿石中的萤石矿物进行了系统流体包裹体研究。结果表明,邹家山矿床-130 m标高和206 m标高流体包裹体的均一温度平均值为266.1℃和159.9℃,盐度w(NaCleq)为11.61%和13.16%,密度为0.88 g/cm3和1.00 g/cm3;均一温度与盐度之间呈抛物线型关系,密度与均一温度为负相关,而密度与盐度正相关。横涧矿床-3 m标高和92 m标高流体包裹体的均一温度平均值为259.9℃和291.7℃,盐度w(NaCleq)为13.45%和7.95%,密度为0.91 g/cm3和0.79 g/cm3;均一温度与盐度正相关,密度与均一温度负相关、与盐度关系不明显。沙洲矿床-138 m标高和-98 m标高流体包裹体的均一温度平均值为297.3℃和272.9℃,盐度w(NaCleq)为13.73%和11.62%,密度为0.86 g/cm3和0.87 g/cm3;均一温度与盐度之间规律性不明显,密度与均一温度负相关、与盐度之间关系不明显。计算获得邹家山矿床-130 m标高和206 m标高铀成矿平均深度是860 m和550 m,横涧矿床-3 m标高和92 m标高平均深度是930 m和950 m,沙洲矿床-138 m标高和-98 m标高平均深度为578 m和537 m。与地表标高对比获得,邹家山、沙洲和横涧铀矿床形成后的剥蚀程度分别在320~416 m、190~240 m、727~902 m之间。相山北西部地区的抬升剥蚀程度强于南东部地区,显示东部和南部地区在深部有较好的找矿前景。
Based on a study of the fluid inclusions in fluorite from the Zoujianshan,Hengjian and Shazhou uranium deposits in the Xiangshan uranium orefield of Jiangxi,the authors have drawn the conclusions as follows: In the Zoujiashan uranium deposit,the average homogenization temperatures of fluid inclusions are 266.1℃ and 159.9℃ at the elevations of-130 m and 206 m,the average salinities w(NaCleq) are 11.61% and 13.16%,and the mean densities of fluorite inclusions are 0.88 g/cm3 and 1.00 g/cm3,suggesting that the regularity of homogenization temperature and salinity is of the parabola type;the density and homogenization temperature are significantly of negative correlation,and the density and salinity are of positive correlation.In the Hengjian uranium deposit,the average homogenization temperatures of fluid inclusions at the elevations of-3 m and 92 m are 259.9℃ and 291.7℃ respectively,the average salinities w(NaCleq) are 13.45% and 7.95%,and the mean densities are 0.91 g/cm3 and 0.79 g/cm3.The density and homogenization temperature are obviously of negative correlation,and the density and salinity do not show obvious correlation.In the Shazhou uranium deposit,the average homogenization temperatures of fluid inclusions are 297.3℃ and 272.9℃ at the elevations of-138 m and-98 m,the average salinities w(NaCleq) are 13.73% and 11.62%,and the mean densities of fluorite inclusions are 0.86 g/cm3 and 0.87 g/cm3,suggesting that the regularity of homogenization temperature and salinity is inconspicuous,the density and homogenization temperature are significantly of negative correlation,and the relationship between density and salinity is not obvious.In the Zoujiashan ore deposit,the average uranium metallogenic depths at the elevations of-130 m and 206 m are 860 m and 550 m,measured by the fluid inclusion method.In the Hengjian ore deposit,the average uranium metallogenic depths at the elevations of-3 m and 92 m are 930 m and 950 m.In the Shazhou ore deposit,the average uranium metallogenic depths at the elevations of-138 m and-98 m are 578 m and 537 m.A comparison with the surface elevation shows that the denudation depths after the formation of the Zoujiashan,Hengjian and Shazhou uranium deposits are respectively 320~416 m,190~240 m,and 727~902 m.The extent of uplift and erosion in northwestern Xiangshan is more serious than that in southeastern Xiangshan area,and the deep areas of eastern and southern Xiangshan have favorable ore-search prospect.
Based on a study of the fluid inclusions in fluorite from the Zoujianshan,Hengjian and Shazhou uranium deposits in the Xiangshan uranium orefield of Jiangxi,the authors have drawn the conclusions as follows: In the Zoujiashan uranium deposit,the average homogenization temperatures of fluid inclusions are 266.1℃ and 159.9℃ at the elevations of-130 m and 206 m,the average salinities w(NaCleq) are 11.61% and 13.16%,and the mean densities of fluorite inclusions are 0.88 g/cm3 and 1.00 g/cm3,suggesting that the regularity of homogenization temperature and salinity is of the parabola type;the density and homogenization temperature are significantly of negative correlation,and the density and salinity are of positive correlation.In the Hengjian uranium deposit,the average homogenization temperatures of fluid inclusions at the elevations of-3 m and 92 m are 259.9℃ and 291.7℃ respectively,the average salinities w(NaCleq) are 13.45% and 7.95%,and the mean densities are 0.91 g/cm3 and 0.79 g/cm3.The density and homogenization temperature are obviously of negative correlation,and the density and salinity do not show obvious correlation.In the Shazhou uranium deposit,the average homogenization temperatures of fluid inclusions are 297.3℃ and 272.9℃ at the elevations of-138 m and-98 m,the average salinities w(NaCleq) are 13.73% and 11.62%,and the mean densities of fluorite inclusions are 0.86 g/cm3 and 0.87 g/cm3,suggesting that the regularity of homogenization temperature and salinity is inconspicuous,the density and homogenization temperature are significantly of negative correlation,and the relationship between density and salinity is not obvious.In the Zoujiashan ore deposit,the average uranium metallogenic depths at the elevations of-130 m and 206 m are 860 m and 550 m,measured by the fluid inclusion method.In the Hengjian ore deposit,the average uranium metallogenic depths at the elevations of-3 m and 92 m are 930 m and 950 m.In the Shazhou ore deposit,the average uranium metallogenic depths at the elevations of-138 m and-98 m are 578 m and 537 m.A comparison with the surface elevation shows that the denudation depths after the formation of the Zoujiashan,Hengjian and Shazhou uranium deposits are respectively 320~416 m,190~240 m,and 727~902 m.The extent of uplift and erosion in northwestern Xiangshan is more serious than that in southeastern Xiangshan area,and the deep areas of eastern and southern Xiangshan have favorable ore-search prospect.
引文
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黄锡强,陈正乐,王平安,杨农,郅剑.2008.江西相山铀矿田沙洲矿床流体包裹体研究[J].地质力学学报,14(2):176-185.
李惠.1997.金矿床地球化学异常模式研究的新进展[J].地质与勘探,33(2):43-47.
李诺,陈衍景,倪智勇,胡海珠.2009.河南省嵩县鱼池岭斑岩钼矿床成矿流体特征及其地质意义[J].岩石学报,25(10):2509-2522.
卢焕章,范宏瑞,倪培,欧光习,沈昆,张文淮.2004.流体包裹体[M].北京:科学出版社.
邵洁涟,梅建明.1986.浙江火山岩区金矿床的矿物包裹体标型特征研究及其成因与找矿意义[J].矿物岩石,6(3):103-111.
沈锋,陈然志,李方.1995.华南相山铀矿田成矿条件及发展前景[J].铀矿地质,11(5):252-265.
王蕾,张树明,蒋振频,郭国林.2008.相山铀矿田沙洲矿床流体包裹体研究[J].大地构造与成矿学,32(4):500-508.
文春华,徐文艺,钟宏,吕庆田,杨竹森,田世洪,刘英超.2011.安徽姚家岭锌金多金属矿床地质特征与浅部矿化流体包裹体研究[J].矿床地质,30(3):533-546.
翟德高,王建平,刘家军,吴胜华,毛光剑,王守光,李王玺.2010.内蒙古甲乌拉银多金属矿床成矿流体演化与机制分析[J].矿物岩石,30(2):68-76.
张德会,徐九华,余心起,李健康,毛世德,王科强,李泳泉.2011.成岩成矿深度:主要影响因素与压力估算方法[J].地质通报,30(1):112-125.
张树明,王蕾,蒋振频,郭国林,安伟涛,刘金枝,邵上.2009.相山铀矿田邹家山矿床流体包裹体研究[J].铀矿地质,25(5):263-269.
张万良,刘德长,李子颖,张静波.2005.江西相山铀矿田遥感影像呈现的新构造运动及其意义[J].国土资源遥感,65(3):52-56.
张万良,刘德长,李子颖,张静波.2007.江西相山矿田西北部与东南部矿床侵蚀程度的对比分析[J].大地构造与成矿学,31(3):348-352.
Bischoff J L.1991.Densities of liquids and vaporsin boiling NaCl-H2O:APVTXsummary from300℃to500℃[J].American Journal ofScience,291:309-338.
Haas J L.1976.Physical properties of the coexisting phases andthermo-chemical properties of the H2O component in boiling NaCl solution[J].US Geol.Surv.Bull.,1421A:1-73.
Hall D L,Sterner S Mand Bodnar RJ.1988.Freezing point depressionof NaCl-KCl-H2Osolution[J].Econ.Geol.,83:197-202.
Roedder Eand Bodnar RJ.1980.Geologic pressure determinationsfromfluidinclusion studies[J].Ann.Rev.Earth Plannet Sci.,8:263-301.
①核工业270研究所、261大队、266大队.1995.相山火山岩型富大铀矿找矿模式及攻深方法技术研究.49-5-1成果报告.内部资料.
冯佳睿,周振华,程彦博.2010.云南南秧田钨矿床流体包裹体特征及其意义[J].岩石矿物学杂志,29(1):50-58.
黄锡强,陈正乐,王平安,杨农,郅剑.2008.江西相山铀矿田沙洲矿床流体包裹体研究[J].地质力学学报,14(2):176-185.
李惠.1997.金矿床地球化学异常模式研究的新进展[J].地质与勘探,33(2):43-47.
李诺,陈衍景,倪智勇,胡海珠.2009.河南省嵩县鱼池岭斑岩钼矿床成矿流体特征及其地质意义[J].岩石学报,25(10):2509-2522.
卢焕章,范宏瑞,倪培,欧光习,沈昆,张文淮.2004.流体包裹体[M].北京:科学出版社.
邵洁涟,梅建明.1986.浙江火山岩区金矿床的矿物包裹体标型特征研究及其成因与找矿意义[J].矿物岩石,6(3):103-111.
沈锋,陈然志,李方.1995.华南相山铀矿田成矿条件及发展前景[J].铀矿地质,11(5):252-265.
王蕾,张树明,蒋振频,郭国林.2008.相山铀矿田沙洲矿床流体包裹体研究[J].大地构造与成矿学,32(4):500-508.
文春华,徐文艺,钟宏,吕庆田,杨竹森,田世洪,刘英超.2011.安徽姚家岭锌金多金属矿床地质特征与浅部矿化流体包裹体研究[J].矿床地质,30(3):533-546.
翟德高,王建平,刘家军,吴胜华,毛光剑,王守光,李王玺.2010.内蒙古甲乌拉银多金属矿床成矿流体演化与机制分析[J].矿物岩石,30(2):68-76.
张德会,徐九华,余心起,李健康,毛世德,王科强,李泳泉.2011.成岩成矿深度:主要影响因素与压力估算方法[J].地质通报,30(1):112-125.
张树明,王蕾,蒋振频,郭国林,安伟涛,刘金枝,邵上.2009.相山铀矿田邹家山矿床流体包裹体研究[J].铀矿地质,25(5):263-269.
张万良,刘德长,李子颖,张静波.2005.江西相山铀矿田遥感影像呈现的新构造运动及其意义[J].国土资源遥感,65(3):52-56.
张万良,刘德长,李子颖,张静波.2007.江西相山矿田西北部与东南部矿床侵蚀程度的对比分析[J].大地构造与成矿学,31(3):348-352.
Bischoff J L.1991.Densities of liquids and vaporsin boiling NaCl-H2O:APVTXsummary from300℃to500℃[J].American Journal ofScience,291:309-338.
Haas J L.1976.Physical properties of the coexisting phases andthermo-chemical properties of the H2O component in boiling NaCl solution[J].US Geol.Surv.Bull.,1421A:1-73.
Hall D L,Sterner S Mand Bodnar RJ.1988.Freezing point depressionof NaCl-KCl-H2Osolution[J].Econ.Geol.,83:197-202.
Roedder Eand Bodnar RJ.1980.Geologic pressure determinationsfromfluidinclusion studies[J].Ann.Rev.Earth Plannet Sci.,8:263-301.
①核工业270研究所、261大队、266大队.1995.相山火山岩型富大铀矿找矿模式及攻深方法技术研究.49-5-1成果报告.内部资料.
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