矿物尺度下烃类气体的赋存特点与地质意义
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摘要
以山东焦家金矿I号主矿体为研究对象,选取128线金矿体周围不同地质体岩石样品,对样品中疑似碳酸盐矿物,通过岩矿鉴定、激光拉曼、电子探针等方法进行分析,从矿物尺度对烃类气体的赋存特点进行研究,以期获取烃类气体参与成矿的直接证据。研究发现,样品中的疑似碳酸盐矿物电子探针测定成分与纯净的方解石成分吻合,在金矿体周围不同地质体中均可见方解石以极细小的颗粒充填于矿物裂隙或矿物颗粒之间形成细脉,具有后期形成的特点;其次,电子探针数据与酸解烃法得出的烃类气体含量整体呈现出一致的变化关系,具向外渗滤扩散的特点。研究证实了疑似碳酸盐矿物确实为碳酸盐矿物,且其为烃类气体的赋存提供了载体,找到了烃类气体参与成矿在矿物尺度上的直接的证据,同时证明了酸解烃法能够有效提取与成矿有关的烃气信息,对寻找金属矿床具有一定的指导作用。
The No. I ore body of the Jiaojia Gold Mine in Shandong Province is taken as the research object in this paper.Rock samples of different geological bodies around gold ore body on the Line 128 are selected for analyzing the suspected carbonate minerals in samples using methods of rock and mineral identification, laser Raman analysis and electron probe analysis, to study the occurrence characteristics of hydrocarbon gases at mineral scale in order to obtain direct evidence of the hydrocarbon gas involvement in mineralization. It has been found that compositions of suspected carbonate minerals in samples analyzed using EPMA are coincided with that of pure calcite. In different geological bodies around the gold ore body, calcite occurred as very fine particles filling in mineral fissures or as veinlets filling in pores between mineral particles, indicating characteristics of later stage formation. In addition, contents of the hydrocarbon gas obtained by using EPMA analysis are generally consistent with those obtained by using the acid-hydrolyzed hydrocarbon method. The hydrocarbon gas has characteristics of outward infiltration and diffusion. This study has confirmed that the suspected carbonate minerals in samples are indeed carbonate minerals which had provided carriers for hosting hydrocarbon gases.The direct evidence for the involvement of hydrocarbon gases in the gold mineralization at mineral scale has been found.At the same time, it is proved that the acid-hydrolyzed hydrocarbon method can be used to effectively extract hydrocarbon gas information related to the gold mineralization and can be certainly used for guiding the exploration of metal deposits.
The No. I ore body of the Jiaojia Gold Mine in Shandong Province is taken as the research object in this paper.Rock samples of different geological bodies around gold ore body on the Line 128 are selected for analyzing the suspected carbonate minerals in samples using methods of rock and mineral identification, laser Raman analysis and electron probe analysis, to study the occurrence characteristics of hydrocarbon gases at mineral scale in order to obtain direct evidence of the hydrocarbon gas involvement in mineralization. It has been found that compositions of suspected carbonate minerals in samples analyzed using EPMA are coincided with that of pure calcite. In different geological bodies around the gold ore body, calcite occurred as very fine particles filling in mineral fissures or as veinlets filling in pores between mineral particles, indicating characteristics of later stage formation. In addition, contents of the hydrocarbon gas obtained by using EPMA analysis are generally consistent with those obtained by using the acid-hydrolyzed hydrocarbon method. The hydrocarbon gas has characteristics of outward infiltration and diffusion. This study has confirmed that the suspected carbonate minerals in samples are indeed carbonate minerals which had provided carriers for hosting hydrocarbon gases.The direct evidence for the involvement of hydrocarbon gases in the gold mineralization at mineral scale has been found.At the same time, it is proved that the acid-hydrolyzed hydrocarbon method can be used to effectively extract hydrocarbon gas information related to the gold mineralization and can be certainly used for guiding the exploration of metal deposits.
引文
[1]徐庆鸿,陈远荣,贾国相,等.烃类组分在金属矿床的成矿理论和矿产勘查研究中的应用[J].岩石学报,2007,23(10):2623-2638.
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[3]Saxby J D.The significance of organic matter in ore genesis[M].Geochemical Studies,Elsevier B V,1976:111-133.
[4]Simoneit B R T.Hydrothermal petroleum:genesis,migration and deposition in Guaymas Basin,Gulf of California[J].Canadian Journal of Earth Sciences,1984,22(12):1919-1929.
[5]陈毓川,黄民智,徐珏,等.大厂锡石-硫化物多金属矿带地质特征及成矿系列[J].地质学报,1985,59(3):228-240.
[6]王登红,陈毓川,陈文,等.广西南丹大厂超大型锡多金属矿床的成矿时代[J].地质学报,2004,78(1):132-138.
[7]傅家谟,刘德汉.有机质演化与沉积矿床成因(Ⅱ)--煤成烃类与层控矿床[J].沉积学报,1983,1(4):15-28.
[8]阮天健,朱有光.地球化学找矿[M].北京:地质出版社,1985.
[9]涂光炽,陈先沛,王秀璋.中国层控矿床地球化学(第三卷)[M].北京:科学出版社,1988.
[10]卢焕章,李秉伦,沈昆.包裹体地球化学[M].北京:地质出版社,1990:171-177.
[11]刘英俊,邱德同.勘查地球化学[M].北京:科学出版社,1987:1-387.
[12]李生郁,郑康乐,徐丰孚.微量轻烃气体快速分析方法及其在金属矿化探中的应用[J].物探与化探,1990,14(4):303-311.
[13]施继锡,余孝颖.碳酸盐岩中包裹体有机质特征与非常规油气评价[J].矿物学报,1996,16(2):103-108.
[14]王兆云,程克明.碳酸盐岩中不同赋存状态有机质地球化学特征对比及对成烃的贡献[J].沉积学报,2000,18(4):600-605.
[15]陈远荣,贾国相,戴塔根.论有机质与金属成矿和勘查[J].中国地质,2002,30(3):257-262.
[16]徐庆鸿,陈远荣,毛景文,等.有机烃在预测隐伏金矿床中的应用及其成因探索[J].地质评论,2005,51(5):583-590.
[17]李生郁,徐丰孚.轻烃及硫化物气体测量找寻多金属隐伏矿方法试验[J].物探与化探,1997,(2):127-138.
[18]侯满堂.陕西马元铅锌矿有机质与成矿作用的关系研究[J].中国地质,2009,36(4):861-870.
[19]陈远荣,贾国相,徐庆鸿.气体集成快速定位预测隐伏矿的新技术研究[M].北京:地质出版社,2003:1-126.
[20]庞绪成.山东焦家金矿矿床地球化学特征及深部矿体预测研究[D].成都:成都理工大学,2005,1-133.
[21]宋明春,宋英昕,沈昆,等.胶东焦家深部金矿矿床地球化学特征及有关问题讨论[J].地球化学,2013,42(3):274-289.
[22]赵鹏沄,顾雪祥,邓小华.山东焦家金矿矿床成因及成矿模式[J].地质与勘探,2007(4):29-35.
[23]宋明春,崔书学,伊丕厚,等.胶西北金矿集中区深部大型-超大型金矿找矿与成矿模式[M].北京:地质出版社,2010.
[24]GB/T 17359-2012,全国微束分析标准化技术委员会.微束分析能谱法定量分析[S].
[25]於崇文,岑况,龚庆杰,等.湖南郴州柿竹园超大型钨多金属矿床的成矿复杂性研究[J].地学前缘,2003(3):15-39.
[2]Dozy J J.A geological model for the genesis of lead-zinc ores of the Mississippi Valley,USA[J].Trans Inst Min Metal(B),1970,79:163-170.
[3]Saxby J D.The significance of organic matter in ore genesis[M].Geochemical Studies,Elsevier B V,1976:111-133.
[4]Simoneit B R T.Hydrothermal petroleum:genesis,migration and deposition in Guaymas Basin,Gulf of California[J].Canadian Journal of Earth Sciences,1984,22(12):1919-1929.
[5]陈毓川,黄民智,徐珏,等.大厂锡石-硫化物多金属矿带地质特征及成矿系列[J].地质学报,1985,59(3):228-240.
[6]王登红,陈毓川,陈文,等.广西南丹大厂超大型锡多金属矿床的成矿时代[J].地质学报,2004,78(1):132-138.
[7]傅家谟,刘德汉.有机质演化与沉积矿床成因(Ⅱ)--煤成烃类与层控矿床[J].沉积学报,1983,1(4):15-28.
[8]阮天健,朱有光.地球化学找矿[M].北京:地质出版社,1985.
[9]涂光炽,陈先沛,王秀璋.中国层控矿床地球化学(第三卷)[M].北京:科学出版社,1988.
[10]卢焕章,李秉伦,沈昆.包裹体地球化学[M].北京:地质出版社,1990:171-177.
[11]刘英俊,邱德同.勘查地球化学[M].北京:科学出版社,1987:1-387.
[12]李生郁,郑康乐,徐丰孚.微量轻烃气体快速分析方法及其在金属矿化探中的应用[J].物探与化探,1990,14(4):303-311.
[13]施继锡,余孝颖.碳酸盐岩中包裹体有机质特征与非常规油气评价[J].矿物学报,1996,16(2):103-108.
[14]王兆云,程克明.碳酸盐岩中不同赋存状态有机质地球化学特征对比及对成烃的贡献[J].沉积学报,2000,18(4):600-605.
[15]陈远荣,贾国相,戴塔根.论有机质与金属成矿和勘查[J].中国地质,2002,30(3):257-262.
[16]徐庆鸿,陈远荣,毛景文,等.有机烃在预测隐伏金矿床中的应用及其成因探索[J].地质评论,2005,51(5):583-590.
[17]李生郁,徐丰孚.轻烃及硫化物气体测量找寻多金属隐伏矿方法试验[J].物探与化探,1997,(2):127-138.
[18]侯满堂.陕西马元铅锌矿有机质与成矿作用的关系研究[J].中国地质,2009,36(4):861-870.
[19]陈远荣,贾国相,徐庆鸿.气体集成快速定位预测隐伏矿的新技术研究[M].北京:地质出版社,2003:1-126.
[20]庞绪成.山东焦家金矿矿床地球化学特征及深部矿体预测研究[D].成都:成都理工大学,2005,1-133.
[21]宋明春,宋英昕,沈昆,等.胶东焦家深部金矿矿床地球化学特征及有关问题讨论[J].地球化学,2013,42(3):274-289.
[22]赵鹏沄,顾雪祥,邓小华.山东焦家金矿矿床成因及成矿模式[J].地质与勘探,2007(4):29-35.
[23]宋明春,崔书学,伊丕厚,等.胶西北金矿集中区深部大型-超大型金矿找矿与成矿模式[M].北京:地质出版社,2010.
[24]GB/T 17359-2012,全国微束分析标准化技术委员会.微束分析能谱法定量分析[S].
[25]於崇文,岑况,龚庆杰,等.湖南郴州柿竹园超大型钨多金属矿床的成矿复杂性研究[J].地学前缘,2003(3):15-39.
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