新疆乌恰萨热克铜矿北矿带库孜贡苏组沉积相、古流向、物源区及其找矿意义——来自砾石统计分析的证据
Sedimentary facies, paleocurrent, provenances and prospecting significance of Kuzigong-su Formation in the northern ore belt of the Sareke copper deposit in Wuqia, Xinjiang: Evidence from gravel statistic analy-sis
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摘要: 萨热克盆地库孜贡苏组是萨热克铜矿的赋矿层位,开展沉积相、物源区及古流向研究对隐伏铜矿的勘探具有重要意义。选取萨热克铜矿北矿带库孜贡苏组地表矿化最好的砾岩展开砾石统计分析,结果表明,偏斜度显示砾岩为冲积扇相沉积,砾石叠瓦状和砂岩斜层理产状统计显示古流向为北北东向;砾石成分主要为石英、石英砂岩、砂岩,石英岩等;粒度分布呈宽峰态或尖峰态;物源区为元古宇长城系阿克苏群变质岩剥蚀区;物源补给分为主河流补给和支河流补给2种方式。冲积扇相、古流向、物源区分析确定了矿体的范围、最优的勘探线布置方位和潜在的找矿靶区,具有很好的勘探意义。Abstract: The Late Jurassic Kuzigongsu Formation in the Sareke Basin is the ore-bearing horizon of the Sareke copper deposit, and its sedimentary facies, provenance and palaeocurrent direction are of important significance for the exploration of the concealed cop-per deposits. The authors selected the best surface mineralized conglomerate of the Late Jurassic Kuzigongsu Formation located in the northern ore belt of Sareke basin to conduct statistical analysis of gravel. Some results were obtained:the skewness of the gravel shows that it is of alluvial fan facies; attitude statistics of the imbricated gravel and sandstone oblique bedding show that the paleocurrent was in NNE direction; components of gravel are quartz, quartz sandstone, sandstone, quartzite etc.; the distribution of the particle sizes is in shapes of wide peak and sharp peak; the source area was the eroded area of the metamorphic rocks of Calymmian Aksu Group; the supply of the provenance came from the main river and the branching river. The study of alluvial fans, ancient flows and the prove-nance has determined the range of the orebody, the best orientation of the exploration line and the potential prospecting targets, thus providing guidance for further exploration.
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Key words:
- Sareke basin /
- provenance /
- gravel statistical analysis /
- alluvial fan facies /
- palaeocurrent /
- Xinjiang
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[1] 肖爱芳,黎敦朋,李新林,等. 新疆库木库里盆地铜矿地质特征及找矿前景[J].陕西地质,2002,12(2):50-58.
[2] 王平户,张国成,解新国.新疆库木库里盆地砂砾岩型铜矿成因分析[J].地质与勘探,2009,45(1):18-21.
[3] 侯满堂,梁群峰,姚宽院,等.新疆库木库里盆地砂(砾)岩型铜矿地质特征及其控矿条件分析[J].西北地质,2005,38(1):37-48.
[4] 胡煜昭,韩润生,闵朝龙,等.楚雄盆地六苴铜矿含矿岩系沉积演化、成矿时代及成矿深度分析[J].世界地质,2010,29(2):218-225.
[5] 罗卫,孙宁,魏红军. 沅麻盆地砂岩型铜矿成矿地质特征及其控矿条件研究[J].中国矿业,2015,24(9):72-79.
[6] 陈彦文.甘肃六盘山坳陷带沉积砂砾岩型铜矿地质特征分析[J].甘肃科技,2008,24(21):74-77.
[7] 彭楠,柳永清,旷红伟.北祁连北山地区早白垩世盆地物源分析——来自古水流砾石组分(砂岩组分)和碎屑锆石年龄的证据[J].地质通报,2013,32(2/3):456-475.
[8] 陈奋宁,徐亚东,陈锐明,等.藏南吉隆盆地中新世"早更新世沉积演化[J].地质通报,2013, 32(1):154-163.
[9] 渠洪杰,胡健民,崔建军,等.大巴山构造带东段秭归盆地侏罗纪沉积充填过程及其构造演化[J].地质学报,2009,83(9):1255-1266.
[10] 张云鹏,任建业,赵学钦,等.黑龙江东部林口地区下白垩统穆棱组砾岩的成因及其意义[J]. 地质通报,2012,31(10):1731-1738.
[11] 陈留勤,郭福生,梁伟,等.江西抚崇盆地上白垩统河口组砾石统计特征及其地质意义[J].现代地质,2013,27(3):568-576.
[12] 侯伟,刘招君,何玉平,等.漠河盆地上侏罗统物源分析及其地质意义[J].地质论评,2010, 56(1):71-79.
[13] 黎兵,李勇,张开均,等.青藏高原东缘晚新生代大邑砾岩的物源分析与水系变迁[J].第四纪研究,2007,27(1):64-73.
[14] 和政军,牛宝贵,张新元.晚侏罗世承德盆地砾岩碎屑源区分析及构造意义[J].岩石学报, 2007, 23(3):665-666.
[15] 郑勇,孔屏.四川盆地西缘晚新生代大邑砾岩的物源及其成因:来自重矿物和孢粉的证据[J].岩石学报,2013, 29(8):2949-2958.
[16] 王凤林,李勇,李永昭,等.成都盆地新生代大邑砾岩的沉积特征[J]. 成都理工大学学报:自然科学版,2003, 30(2):139-146.
[17] 王建强,贾楠,刘池洋,等.鄂尔多斯盆地西南部下白垩统宜君组砾岩砾组分析及其意义[J]. 沉积学报,2011, 29(2):226-234.
[18] 钱程,韩建恩,余佳,等.山西榆社盆地新近系马会组砾岩层砾组特征及其地质意义[J].现代地质,2011, 25(4):778-788.
[19] 韩建恩,余佳,孟庆伟,等. 西藏阿里地区札达盆地第四纪砾石统计及其意义[J].地质通报, 2005, 24(7):630-636.
[20] 胡庆雯,刘宏林.新疆乌恰县萨热克砂岩铜矿床地质特征与找矿前景[J].矿产与地质,2008, 22(2):131-144.
[21] 胡剑辉,吉蕴生,曾志钢,等.新疆萨热克铜矿床地球化学异常评价研究[J].矿产勘查,2014, 5(2):281-292.
[22] 祝新友,王京彬,王玉杰,等. 新疆萨热克铜矿——与盆地卤水作用有关的大型矿床[J].矿产勘查,2011, 2(1):28-35.
[23] 朱筱敏.沉积岩石学(第四版)[M].北京:石油工业出版社,2008:53-70.
[24] 林秀斌,冻汉林,Wyrwoll K H, 等.青藏高原东北部隆升:来自宁夏同心小洪沟剖面的证据.地质学报,2009, 83(4):454-456.
[25] 廖林,陈汉林,程晓敢,等.帕米尔东北缘新生代隆升活动:来自奥依塔格剖面砾石统计的证据[J].地球科学,2012,4(37):701-804.
[26] Krumbein W C.Size frequency distributions of sediments[J].Journal of Sedimentary Petrology,1934,4:65-77.
[27] Folk R L, Ward W C. Brazos River bar[Texas]:a study in the sig-nificance of grain size parameters[J]. Journal of Sedimentary Petrolo-gy, 1957,27(1):3-26.
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