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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:

第33卷

期数:

2011年第01期

页码:

14-23，33

栏目:

基础地质与矿产地质

出版日期:

2011-03-15

文章信息/Info

Title:

Geochemistry of Fluid Inclusions of the Basalt Copper Deposits in Adjacent Area of Northeastern Yunnan and Western Guizhou, China

文章编号:

1672-6561(2011)01-0014-10

作者:

李厚民; 毛景文; 张长青

中国地质科学院矿产资源研究所 国土资源部成矿作用与资源评价重点实验室,北京 100037

Author(s):

LI Hou-min; MAO Jing-wen; ZHANG Chang-qing

Key laboratory of Metallogeny and Mineral Assessment of Ministry of Land and Resources,Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China

关键词:

气液包裹体; 古石油包裹体; 成矿流体; 玄武岩铜矿; 滇黔交界地区

Keywords:

fluid inclusion;  palaeo-petroleum inclusion;  metallogenic fluid;  basalt copper mineralization;  adjacent area of northeastern Yunnan and western Guizhou

分类号:

P618.41

DOI:

-

文献标志码:

A

摘要:

为了探讨玄武岩铜矿成矿流体的特征,对滇黔交界地区峨眉山玄武岩铜矿3个成矿期次铜矿石中石英和方解石的气液包裹体进行了激光拉曼成分研究和均一温度、盐度测定,对古石油包裹体通过荧光显微镜进行了成分鉴定。结果表明:第1、2期次成矿流体主要为盆地卤水,其气液包裹体气液比小(一般5%～10%),w(NaCl)为8%～22%,气相为甲烷,液相为水,无子晶及液相CO₂,均一温度为80℃～260℃;第2期次成矿流体除盆地卤水外,还有以古石油为代表的有机流体,古石油包裹体由液态烃、固体沥青和气相组成,均一温度变化大(30℃～290℃),液态烃以荧光性强的芳烃为主;第3期次成矿流体具有大气降水成因,其气液包裹体气液比一般为5%～10%,w(NaCl)<4%,无子晶及液相CO₂,均一温度140℃～270℃,但以小于200℃为主。从第1期次到第3期次,成矿流体盐度逐渐降低,特别是第3期次的盐度非常低,但温度变化不明显。本区最重要的自然铜沉淀富集成矿是第2期次不同性质成矿流体混合或成矿流体与有机流体混合、有机质的还原的结果。

Abstract:

In order to understand the characteristics of ore-forming fluids of the Emeishan basalt copper mineralization in adjacent area of northeastern Yunnan and western Guizhou, studies on the composition, homogenization temperature and salinity of the fluid inclusions and palaeo-petroleum inclusions in quartz and calcite of three metallogenic stages have been carried out by means of laser Ramman microprobe, fluorescent microscope and micro-thermometry. The results show that the ore-forming fluids of the first and the second metallogenic stages are of basinal saline fluids, which are composed of liquid H₂O and gas CH₄ with the ratios of gas to liquid 5%-10%, salinity of 8%-22%(mass fraction of NaCl), and homogenization temperatures range from 80 ℃ to 260 ℃, without liquid CO₂ or daughter minerals. Besides, there also are palaeo-petroleum inclusions that are composed of liquid hydrocarbon dominating of fluorescent aromatic hydrocarbon, solid bitumen and gas phase with homogenization temperature from 30 ℃ to 290 ℃ in the second metallogenic stage. The ore-forming fluids in the third metallogenic stage are of meteoric source, which is composed of liquid and vapor H₂O with the ratios of gas to liquid 5%-10%, lower salinity than 4%(mass fraction of NaCl), and homogenization temperatures mainly range from 140 ℃ to 200 ℃, without liquid CO₂ or daughter minerals. The salinity of the ore-forming fluids decreases from the first stage to the third stage, especially low in the third stage, while the homogenization temperature changes slightly. The main ore depositions are developed in the second stage, which may resulted from the mixing of different ore-forming fluids, or mixing of ore-forming fluids and organic fluids with reduction of organic matter.

参考文献/References:

[1] 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.
[2] 李厚民,毛景文,张 冠,等.滇黔交界地区玄武岩铜矿蚀变分带和有机包裹体特征及其地质意义[J].地质学报,2006,80(7):1026-1034.
[3] 朱炳泉,常向阳,胡耀国,等.滇黔边境鲁甸沿河铜矿床的发现与峨眉山大火成岩省找矿新思路[J].地球科学进展,2002,17(6):912-917.
[4] 朱炳泉,胡耀国,张正伟,等.滇黔地球化学边界似基韦诺(Keweenaw)型铜矿床的发现[J].中国科学:D辑,2002,32(增):49-59.
[5] 朱炳泉,戴橦谟,胡耀国,等.滇东北峨眉山玄武岩中两阶段自然铜矿化的⁴⁰Ar/³⁹Ar与U-Th-Pb年龄证据[J].地球化学,2005,34(3):235-247.
[6] Zhu B Q,Hu Y G,Zhang Z W,et al.Discovery of the Copper Deposits with Features of the Keweenawan Type in the Border Area of Yunnan and Guizhou Provinces[J].Science in China: Series D,2002,46(S1):60-72.
[7] 王砚耕,王尚彦.峨眉山大火成岩省与玄武岩铜矿——以贵州二叠纪玄武岩分布区为例[J].贵州地质,2003,20(1):5-10.
[8] 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.
[9] 李厚民,毛景文,王登红,等.滇黔交界地区峨眉山玄武岩铜矿的PGE及微量元素特征[J].矿床地质,2005,24(3):285-291.
[10] 李厚民,毛景文,张长青,等.滇黔交界地区玄武岩铜矿同位素地球化学特征[J].矿床地质,2004,23(2):232-240.
[11] 李厚民,毛景文,张长青,等.滇黔交界地区玄武岩铜矿中有机质的生物标志物特征及其地质意义[J].地质论评,2005,51(5):539-549.
[12] 李厚民,毛景文,张长青,等.滇黔交界地区玄武岩铜矿有机质的组成、结构及成因[J].地质学报,2004,78(4):519-526.
[13] 李厚民.峨眉山玄武岩铜矿的三种成矿流体[J].矿物学报,2009,29(增):219-220.
[14] Luczaj J A.Epigenetic Dolomitization and MVT Mineralization in Paleozoic Rocks of Eastern Wisconsin,Implication for Regional Fluid Flow[J].AAPG Bulletin,2001,85(8):1534-1535.
[15] Reed J S,Eriksson K A,Bodnar R J.Fluid Inclusions in Quartz Overgrowths,Implications for Paleothermometry and Quartz Authigenesis,Pennsylvanian Sandstones,Central Appalachian Basin[J].Abstracts with Programs,Geological Society of America,2001,33(6):73.
[16] Nesbitt B E,Muehlenbachs K.Paleohydrogeology of the Canadian Rockies and Origins of Brines,Pb-Zn Deposits and Dolomitization in the Western Canada Sedimentary Basin[J].Gelogy,1994,22(3):243-246.
[17] Dutkiewicz A,Ridley J,Buick R.Oil-bearing CO₂-CH₄-H₂O Fluid Inclusions:Oil Survival Since the Palaeoproterozoic After High Temperature Entrapment[J].Chemical Geology,2003,194(1/3):51-79.
[18] Gonzalez P E,Carrillo C A.Petroleum-rich Fluid Inclusions in Fluorite,Coahuila,Mexico,Implications for Sources of Oil and Fluorine[J].Abstracts with Programs,Geological Society of America,2001,33(6):420.
[19] Everett C E,Wilkinson J J.What Makes an Ore Body? A Composition of Fluid Inclusion and Sulfur Isotope Data from Prospects and Deposits in the Irish Zn-Pb Ore-field[J].Abstracts with Programs,Geological Society of America,2000,32(7):282.
[20] Gomez-Fernandez F,Both R A,Mangas J,et al.Metallogenesis of Zn-Pb Carbonate-hosted Mineralization in the South-eastern Region of the Picos de Europa(Central Northern Spain)Province:Geologic,Fluid Inclusion,and Stable Isotope Studies[J].Economic Geology,2000,95(1):19-40.
[21] Juhasz B K,Macaulay C I,Ramseyer K,et al.Poikitopic Quartz Cementation During Basin Inversion,Rotliegend Leman Gas Reservoir,Southern North Sea[R].Washington DC:American Association of Petroleum Geologists,2001.
[22] Guilhaumou N,Ellouz N,Jaswal T M,et al.Genesis and Evolution of Hydrocarbons Entrapped in the Fluorite Deposit of Koh-I-Maran(North Kirthar Range,Pakistan)[J].Marine and Petroleum Geology,2000,17(10):1151-1164.
[23] Rossi C,Goldstein R H,Ceriani A,et al.Fluid Inclusions Record Thermal and Fluid Evolution in Reservoir Sandstones,Khatatba Formation,Western Desert,Egypt:a Case for Fluid Injection[J].AAPG Bulletin,2002,86(10):1773-1799.
[24] Wilkinson J J,Jenkin G R T,Fallick A E,et al.Oxygen and Hydrogen Isotopic Evolution of Variscan Crustal Fluids,South Cornwall,UK[J].Chemical Geology,1995,123(1/4):239-254.
[25] 宋文海,庞家黎.四川盆地西南部上二叠统玄武岩含气性研究[J].天然气工业,1994,14(5):11-15.
[26] Kamali C.⁴⁰Ar-³⁹Ar Dating of Barite and Characterization of Ore Fluids at the Lone Tree Gold Deposit,Humbdbt County,Nevada[R].Socorro:New Mexico Institute of Mining and Technology,1996.
[27] VanBuskirk M C.A Petrographic,Fluid Inclusion and Stable Isotope Study of the Modoc Fossil Hot Spring Gold Deposit,Imperial Valley,California,USA[D].Riverside:University of California,Riverside,1993.
[28] Muchez P,Slobodnik M,Viaene W A,et al.Geochemical Constraints on the Origin and Migration of Palaeofluids at the Northern Margin of the Variscan Forland,Southern Belgium[J].Sedimentary Geology,1995,96(3/4):191-200.
[29] White T,Al-Aasm I S.Hydrothermal Dolomitization of the Mississippian Upper Debolt Formation,Sikanni Gas Field,Northeastern British Columbia,Canada[J].Bulletin of Canadian Petroleum Geology,1997,45(3):297-316.
[30] 张文淮,张德会,刘 敏.江西银山铜铅锌金银矿床成矿流体及成矿机制研究[J].岩石学报,2003,19(2):242-250.
[31] 侯增谦,李荫清,张绮玲,等.海底热水成矿系统中的流体端员与混合过程:来自白银厂和呷村VMS矿床的流体包裹体证据[J].岩石学报,2003,19(2):221-234.
[32] 卢焕章.现代海底烟囱中流体包裹体的研究[J].岩石学报,2003,19(2):235-241.
[33] 林 舸,Zhao C B,王岳军,等.含矿流体混合反应与成矿作用的动力平衡模拟研究[J].岩石学报,2003,19(2):275-282.
[34] 王可勇,姚书振,吕新彪.川西北马脑壳金矿床成矿流体地球化学特征与性质[J].地球化学,2001,30(3):273-281.
[35] 叶 霖,刘铁庚,邵树勋.陕南勉宁略地区铜厂铜矿包裹体地球化学特征研究[J].矿物学报,1997,17(2):194-199.
[36] Abdel A Y M.Geochemical Studies of El Hudi Barite Deposits,Eastern Desert,Egypt[J].Bulletin of the Faculty of Science F:Geology,2002,31(1):79-88.
[37] Adams J J,Rostron B J,Mendoza C A.Evidence for Two-fluid Mixing at Pine Point,NWT[J].Journal of Geochemical Exploration,2000,69:103-108.
[38] Adams J J,Muehlenbachs K,Qing H R.Stable Isotopic Compositions of MVT Carbonates Constrain Age of Mineralization and Ore Precipitation Mechanism at Pine Ponit,NWT[J].Abstracts with Programs,Geological Society of America,2000,32(7):393.
[39] Everett C E,Wilkinson J J,Boyce A J,et al.The Role of Bittern Brines and Fluid Mixing in the Genesis of the Navan Zn-Pb Deposit,Ireland[J].Abstracts with Programs,Geological Society of America,2001,33(6):338.
[40] Grandia F,Cardellach E,Canals A,et al.Geochemistry of the Fluids Related to Epigenetic Carbonate-hosted Zn-Pb Deposits in the Maestrat Basin,Eastern Spain:Fluid Inclusion and Isotope(Cl,C,O,S,Sr)Evidence[J].Economic Geology,2003,98(5):933-954.

相似文献/References:

[1]焦建刚,韩俊民,钱壮志,等.华县西沟地区钼矿地质与成矿潜力[J].地球科学与环境学报,2007,29(03):245.
　JIAO Jian-gang,HAN Jun-min,QIAN Zhuang-zhi,et al.Geology and Metallogenic Potentiality of Molybdenum Mine in Xigou Area,Huaxian County,Shaanxi Province[J].Journal of Earth Sciences and Environment,2007,29(01):245.

备注/Memo

备注/Memo:

收稿日期:2010-10-08
基金项目: 国家自然科学基金项目(40572060); 中国地质调查局项目(1212010535804; 1212010634002; 1212010633903)
作者简介: 李厚民(1962-),男,陕西山阳人,研究员,理学博士,从事矿床学研究。E-mail:lihoumin2002@163.com

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更新日期/Last Update: 2011-03-20