四川甘洛地区铜矿特征
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摘要
通过野外地质调查、矿相学特征分析,探讨四川甘洛地区中二叠统茅口组灰岩及与玄武岩接触带附近的构造破碎带中块状硫化铜银矿成矿特征和矿化富集规律。新山铜矿的铜矿物有黄铜矿、黝铜矿、砷黝铜矿、斑铜矿、蓝铜矿,伴生闪锌矿、方铅矿。Cu的质量分数为1%~10%,最高达52%;Pb+Zn为2%~3%;Ag为100×10-6~200×10-6,最高达846×10-6。含矿地层早于玄武岩喷发,矿石有益组分多,构造控矿特征显著,初步认为是铜多金属矿浆充填成矿。
This paper studies the metallogenic features and the mineralization enrichment regularity of copper-silver sulphide diposit.The deposit occurs in the limestone of Maokou Formation and the vicinity of structural fracture belt where the limestone is in contact with basalt in Middle Permian in Ganluo of Sichuan,China.The authors provide a new approach for prospecting in this paper.Through the field geological investigation and mineragraphy characteristics analysis,they discover that the mineral components of the Xinshan copper deposit include chalcopyrite,tetrahedrite,arsenfahlerz,bornite,azurite,associated sphalerite,and galena.The mass fraction of Cu is 1%~10%,Pb+Zn 2%~3%,and Ag 100×10-6~200×10-6.This ore-bearing stratum has been existed before the basalt eruption,with variety of useful minerals components and obvious structural ore-control characteristics.This has obviously nothing to do with volcanic mechanism.In summary,the authors preliminary believe that the deposit genesis is the filling of copper and polymetallic ore magma.This new copper deposit type has a high grade,is large scale,and accompanies rich beneficial elements.It has a great prospecting potential.
This paper studies the metallogenic features and the mineralization enrichment regularity of copper-silver sulphide diposit.The deposit occurs in the limestone of Maokou Formation and the vicinity of structural fracture belt where the limestone is in contact with basalt in Middle Permian in Ganluo of Sichuan,China.The authors provide a new approach for prospecting in this paper.Through the field geological investigation and mineragraphy characteristics analysis,they discover that the mineral components of the Xinshan copper deposit include chalcopyrite,tetrahedrite,arsenfahlerz,bornite,azurite,associated sphalerite,and galena.The mass fraction of Cu is 1%~10%,Pb+Zn 2%~3%,and Ag 100×10-6~200×10-6.This ore-bearing stratum has been existed before the basalt eruption,with variety of useful minerals components and obvious structural ore-control characteristics.This has obviously nothing to do with volcanic mechanism.In summary,the authors preliminary believe that the deposit genesis is the filling of copper and polymetallic ore magma.This new copper deposit type has a high grade,is large scale,and accompanies rich beneficial elements.It has a great prospecting potential.
引文
[1]Fong K L.Field evidences of supergene enrichment ofthe copper deposits of Sichuan,Sikang and Yunnan[J].Bulletion of the Geological Society of China,1947,27:347-358.
[2]李厚民,毛景文,徐章宝,等.滇黔交界地区峨眉山玄武岩铜矿化蚀变特征[J].地球学报,2004,25(5):495-502.
[3]王砚耕,王尚彦.峨眉山大火成岩省与玄武岩铜矿[J].贵州地质,2003,20(1):8-10.
[4]赵支刚,杨铸生,付芳.攀西地区东部玄武岩铜矿的成矿条件及找矿远景[J].四川地质学报,2005,25(2):81-85.
[5]张乾,王大鹏,范良伍,等.滇-黔相邻地区峨眉山玄武岩型自然铜-辉铜矿矿床的成矿规律及成矿前景分析[J].地质与勘探,2008,44(2):8-12.
[6]廖震文,胡光道.一种非传统铜矿资源黔西北地区峨眉山玄武岩铜矿地质特征及成因探讨[J].地质科技情报,2006,25(5):47-51.
[7]郭文魁,常印佛,黄崇柯.我国主要类型铜矿成矿和分布的某些问题[J].地质学报,1978,52(3):169-181.
[8]王大鹏,张乾,朱笑青,等.中国自然铜矿化类型、特点及形成机理浅析[J].矿物学报,2007,27(1):57-63.
[9]Prokin V A,Buslaev F P.Massive copper-zincsulphide deposits in the Urals[J].Ore GeologyReviews,1999,14:1-69.
[10]张招崇.关于峨眉山大火成岩省一些重要问题的讨论[J].中国地质,2009,26(3):634-646.
[11]毛景文,王志良,李厚民,等.云南鲁甸地区二叠纪玄武岩中铜矿床的碳氧同位素对成矿过程的指示[J].地质论评,2003,49(6):610-615.
[12]侯蜀光,徐章宝,章正军,等.滇东北含铜矿床峨眉山玄武岩组地层学特征[J].地层学杂志,2007,31(3):267-271.
[13]冯仁蔚,王兴志,张帆,等.四川西南部周公山及邻区“峨眉山玄武岩”特征及储集性能研究[J].沉积学报,2008,26(6):913-924.
[14]何斌,徐义刚,肖龙,等.峨眉山大火成岩省的形成机制及空间展布:来自沉积地层学的新证据[J].地质学报,2003,77(2):194-202.
[15]张正伟,程占东,朱炳泉,等.峨眉山玄武岩组铜矿化与层位关系研究[J].地球学报,2004,25(5):503-508.
[16]贺尚荣,印仁高.康滇地轴东缘(四川部分)玄武岩铜矿远景调查报告[R].成都:四川省地质矿产局,1995.
[17]Bomhorst T J,Paces J B,Grant N K,et al.Age ofnative copper mineralization,Keweenaw Peninsula,Michigan[J].Economic Geology,1988,83:619-625.
[18]Ho E S,Meyers P A,Mauk J L.Organicgeochemical study of mi neralization in theKeweenawan Nonesuch Formarion at White Pine,Michigan[J].Advances in Organic Geochemistry,1990,16(1/2/3):229-234.
[19]Ho E S,Mauk J L.Relationship between organicmatter and copper mineralization in the ProterozoicNonesuch Formation,northern Michigan[J].OreGeology Reviews,1996,11:71-88.
[2]李厚民,毛景文,徐章宝,等.滇黔交界地区峨眉山玄武岩铜矿化蚀变特征[J].地球学报,2004,25(5):495-502.
[3]王砚耕,王尚彦.峨眉山大火成岩省与玄武岩铜矿[J].贵州地质,2003,20(1):8-10.
[4]赵支刚,杨铸生,付芳.攀西地区东部玄武岩铜矿的成矿条件及找矿远景[J].四川地质学报,2005,25(2):81-85.
[5]张乾,王大鹏,范良伍,等.滇-黔相邻地区峨眉山玄武岩型自然铜-辉铜矿矿床的成矿规律及成矿前景分析[J].地质与勘探,2008,44(2):8-12.
[6]廖震文,胡光道.一种非传统铜矿资源黔西北地区峨眉山玄武岩铜矿地质特征及成因探讨[J].地质科技情报,2006,25(5):47-51.
[7]郭文魁,常印佛,黄崇柯.我国主要类型铜矿成矿和分布的某些问题[J].地质学报,1978,52(3):169-181.
[8]王大鹏,张乾,朱笑青,等.中国自然铜矿化类型、特点及形成机理浅析[J].矿物学报,2007,27(1):57-63.
[9]Prokin V A,Buslaev F P.Massive copper-zincsulphide deposits in the Urals[J].Ore GeologyReviews,1999,14:1-69.
[10]张招崇.关于峨眉山大火成岩省一些重要问题的讨论[J].中国地质,2009,26(3):634-646.
[11]毛景文,王志良,李厚民,等.云南鲁甸地区二叠纪玄武岩中铜矿床的碳氧同位素对成矿过程的指示[J].地质论评,2003,49(6):610-615.
[12]侯蜀光,徐章宝,章正军,等.滇东北含铜矿床峨眉山玄武岩组地层学特征[J].地层学杂志,2007,31(3):267-271.
[13]冯仁蔚,王兴志,张帆,等.四川西南部周公山及邻区“峨眉山玄武岩”特征及储集性能研究[J].沉积学报,2008,26(6):913-924.
[14]何斌,徐义刚,肖龙,等.峨眉山大火成岩省的形成机制及空间展布:来自沉积地层学的新证据[J].地质学报,2003,77(2):194-202.
[15]张正伟,程占东,朱炳泉,等.峨眉山玄武岩组铜矿化与层位关系研究[J].地球学报,2004,25(5):503-508.
[16]贺尚荣,印仁高.康滇地轴东缘(四川部分)玄武岩铜矿远景调查报告[R].成都:四川省地质矿产局,1995.
[17]Bomhorst T J,Paces J B,Grant N K,et al.Age ofnative copper mineralization,Keweenaw Peninsula,Michigan[J].Economic Geology,1988,83:619-625.
[18]Ho E S,Meyers P A,Mauk J L.Organicgeochemical study of mi neralization in theKeweenawan Nonesuch Formarion at White Pine,Michigan[J].Advances in Organic Geochemistry,1990,16(1/2/3):229-234.
[19]Ho E S,Mauk J L.Relationship between organicmatter and copper mineralization in the ProterozoicNonesuch Formation,northern Michigan[J].OreGeology Reviews,1996,11:71-88.
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