四川盆地北缘旺苍背斜铀成矿地质特征及找矿前景
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摘要
旺苍背斜位于四川盆地北缘北西部,工作程度较低。在收集前人资料以及野外地质调查的基础上,分析其地质特征、含矿层特征、铀矿化特征,认为铀矿化产于苍溪组第一层,赋存于富含有机质的岩屑砂岩或砾岩中,距上侏罗统蓬莱镇组与下白垩统苍溪组的区域性假整合面较近,与冲刷构造关系密切,属于以沉积成矿为主,后生改造为辅的砂岩型铀矿。根据成矿理论,分析了构造背景、铀源、目的层、地貌及水文地质、古气候、已知铀矿化信息等成矿判据,认为旺苍背斜具备了形成砂岩型铀矿床的成矿条件,并指出在转折端一带铀异常点(带)较为密集,含矿砂体厚度大,富含有机质,沉积构造发育,地下水具备完善补给-径流-排泄系统,具有较好的找矿前景。
The Wangcang anticline is located in the northwest of the northern margin of Sichuan basin,where little research work about uranium geology has been made. Based on field geological surveys and data available,this paper makes a analysis on the geological characteristics,ore-hosting sandstone beds and uranium mineralization of this structure. It is suggested that uranium mineralization occurred in the first layer of the Cangxi Formation,the lithic sandstone or conglomerate containing organic matter. It is close to the parallel unconformity between the Upper Jurassic Penglaizhen Formation and the Lower Cretaceous Cangxi Formation and closely related to the scour structure. Uranium mineralization is attributed to sandstone-type uranium deposits dominated by sedimentation in genesis and was reformed in the later period. According to the metallogenic theory of sandstone-type uranium deposit,the tectonic setting,the source of uranium,target strata,geomorphological and hydrogeological conditions,paleoclimate,and known uranium mineralization information,this anticline has the metallogenic geological conditions of sandstone-type uranium deposits. It is also noted that uranium anomaly occurrences( belts) are relatively dense around the turning point of the anticline,where the ore-bearing sand bodies are thicker with abundant organic matters,sedimentary structures,and a perfect recharge-runoff-discharge system of groundwater,implying a good ore-search prospect.
The Wangcang anticline is located in the northwest of the northern margin of Sichuan basin,where little research work about uranium geology has been made. Based on field geological surveys and data available,this paper makes a analysis on the geological characteristics,ore-hosting sandstone beds and uranium mineralization of this structure. It is suggested that uranium mineralization occurred in the first layer of the Cangxi Formation,the lithic sandstone or conglomerate containing organic matter. It is close to the parallel unconformity between the Upper Jurassic Penglaizhen Formation and the Lower Cretaceous Cangxi Formation and closely related to the scour structure. Uranium mineralization is attributed to sandstone-type uranium deposits dominated by sedimentation in genesis and was reformed in the later period. According to the metallogenic theory of sandstone-type uranium deposit,the tectonic setting,the source of uranium,target strata,geomorphological and hydrogeological conditions,paleoclimate,and known uranium mineralization information,this anticline has the metallogenic geological conditions of sandstone-type uranium deposits. It is also noted that uranium anomaly occurrences( belts) are relatively dense around the turning point of the anticline,where the ore-bearing sand bodies are thicker with abundant organic matters,sedimentary structures,and a perfect recharge-runoff-discharge system of groundwater,implying a good ore-search prospect.
引文
Chen Youliang.1995.Metallogenic conditions and genetic model of sandstone-type uranium deposits in north Sichuan[J].Acta Geologica Sichuan,15(1):56-59(in Chinese with English abstract).
Chen fenxong,Nie Fengjun,Zhang Chengyong.2016.Mesozoic structural styles and their relationship with uranium deposits in the southern margin of Yili basin[J].Geology and Exploration,52(3):480-488(in Chinese with English abstract).
Guo Ning,Sun Zexuan.2017.Types and prospecting direction of sandstone-type uranium deposits in the northern margin of the Sichuan Basin[J].Geology and Exploration,53(1):54-62(in Chinese with English abstract).
Huang Shijie.1994.Formation conditions and prospecting criteria for sandstone uranium deposit of interlayered oxidation type[J].Uranium Geology,10(1):6-13(in Chinese with English abstract).
Liu Bo,Yang Jianxin,Qiao Baocheng,Zhang Feng.2015.Characteristics of ore-controlling genetic facies and prospect prediction of sandstone-type uranium deposits in the Tengger depression,Inner Mongolia[J].Geology and Exploration,51(5):870-878(in Chinese with English abstract).
Liu Bo,Yang Jianxin,Qin Yanwei,Qiao Peng,Zhang Feng.2016.Research on the ore-controlling genetic facies of the sandstone type uranium deposits in the paleovalley of Saihan Formation of the Erlian basin[J].Geology and Exploration,52(6):1037-1047(in Chinese with English abstract).
Liu Jianhua,Zhu Xiyang.Wang Sili,Wei Jisheng.2005.Geologic-tectonic evolutional characteristics and prospecting potential for ISL-amenable sandstone-type uranium deposits in Sichuan basin[J].U-ranium Geology,21(6):321-330(in Chinese with English abstract).
Mo Banghong,Zhao Jianbo,Liu Xiulin,Qi Qinglin,Xie Bo.2013.The uranium mineralization type and prospecting direction of the Hengshan intrusive body in Miyi county of Sichuan Province[J].Geology and Exploration,49(6):1070-1077(in Chinese with English abstract).
Qiu Yuande,Tong Yunfu.1996.The application of active carbon method in sandstone uranium region of northern Sichuan[J].Journal of Chengdu Institute of Technology,23(2):113-116(in Chinese with English abstract).
Quan Zhi-gao,Zhang Jia-min,Sun Yan-huai,Zhang Fa,Ji Hai-jun.2011.Uranium mineralization characteristics of southwest TurpanHami basin and evaluation of metallogenic potential[J].Geology in China,38(6):1568-1575(in Chinese with English abstract).
Ren Zhongxian,Shen Pingxi,Chen Fengling.2014.Analysis on the geological features and ore-forming conditions at the southern margin of Erdos basin[J].World Nuclear Geoscience,31(3):514-528(in Chinese with English abstract).
Sun Zexuan,Guo Ning,Xiang Qinyou.1999.Analysis on metallogenic conditions and prospect of sandstone-type uranium deposits in Longchuan basin western Yunnan[J].Uranium Geology,15(2):65-66(in Chinese with English abstract).
Wu Shenyang,Wang Deshen,Ma zhanwen.1984.A preliminary study on the material composition and genesis of the 303 sandstone type uranium deposit bearing selenium[J].Uranium Geology,6(2):27-35(in Chinese with English abstract).
Wu Shengyang,Wang Desheng,Wang Shuhua.1988.Characteristics of pitchblende from the sandstone-type uranium deposit in north Sichuan and its metallogenetic time[J].Acta Mineralogica Sinica,8(4):365-373(in Chinese with English abstract).
Wu Rengui,Yu Dagan.2005.Discussion on relationship between sand body of braided stream channel sandstone-type uranium deposit[J].Uranium Geology,21(2):92-96(in Chinese with English abstract).
Zhu Xiyang,Wang Yunliang,Wang Zhichang,Zhang Chengjiang,Liu Jianhua.2005.Application of REE characteristics in the study of sandstone type uranium deposit:a case study of a uranium deposit in the northern Sichuan Basin[J].Geological Review,51(4):401-408(in Chinese with English abstract).
Zhu Xiyang,Wang Yunliang,Wang Zhichang,Zhang Chengjiang.2004.REE characteristics and uranium metallogengsis of sandstone-type uranium deposits in northern Sichuan[J].Uranium Geology,20(2):71-79(in Chinese with English abstract).
Zhu Jueren,Wu Shengyang,Feng Peixin,Wang Desheng,Ma zhanwen.1983.Preliminary study on the genesis of the Mesozoic sandstonetype uranium deposit in northern Sichuan basin[J].Acta Sedimentologica Sinica,1(2):106-117(in Chinese with English abstract).
Zhang Xuefeng,Liu Xiaodong,Liu Jianzhao.2011.Geochemical characteristics of the Huashan Granites in Gangxi Province and their uranium-bearing potential[J].Geology and Exploration,47(6):1051-1058(in Chinese with English abstract).
陈友良.1995.川北砂岩型铀矿床成矿条件及成矿模式探讨[J].四川地质学报,15(1):56-59.
陈奋雄,聂逢君,张成用.2016.伊犁盆地南缘中新生代构造样式与铀成矿关系[J].地质与勘探,52(3):480-488.
郭宁,孙泽轩.2017.川北砂岩铀矿类型及找矿方向[J].地质与勘探,53(1):54-62.
黄世杰.1994.层间氧化带砂岩型铀矿的形成条件及找矿判据[J].铀矿地质,10(1):6-13.
刘波,杨建新,乔宝成,张锋.2015.腾格尔坳陷砂岩型铀矿控矿成因相特征及远景预测[J].地质与勘探,51(5):870-878.
刘波,杨建新,秦彦伟,乔鹏,张锋.2016.二连盆地中东部赛汉组古河谷砂岩型铀矿床控矿成因相研究[J].地质与勘探,52(6):1037-1047.
刘建华,朱西养.王四利,魏继生.2005.四川盆地地质构造演化特征与可地浸砂岩型铀矿找矿前景[J].铀矿地质,21(6):321-330.
莫帮洪,赵剑波,刘秀林,齐清林,解波.2013.康滇地轴中段横山岩体的铀矿化类型与找矿方向[J].地质与勘探,49(6):1070-1077.
邱元德,童运福.1996.活性炭法在川北砂岩型铀矿勘探中的应用[J].成都理工学院学报,23(2):113-116.
权志高,张甲民,孙延怀,张发,姬海军.2011.吐哈盆地西南部铀矿化特征与成矿潜力评价[J].中国地质,38(6):1568-1575.
任中贤,申平喜,陈粉玲.2014.鄂尔多斯盆地南缘砂岩型铀矿地质特征及成矿条件分析[J].世界核地质科学,31(3):514-528.
孙泽轩,郭宁,向清友.1999.滇西陇川盆地砂岩型铀矿成矿条件及远景分析[J].铀矿地质,15(2):65-66.
巫声扬,王德生,马占文.1984.303含硒砂岩型铀矿床物质成分及矿床成因的初步研究[J].放射性地质,6(2):27-35.
巫声扬,王德生,王淑华.1988.川北砂岩型铀矿床中沥青铀矿特征及其成矿时代[J].矿物学报,8(4):365-373.
吴仁贵,余达淦.2005.辫状沉积砂体与砂岩型铀矿的关系剖析[J].铀矿地质,21(2):92-96.
朱西养,汪云亮,王志畅,张成江,刘建华.2005.REE地球化学在砂岩型铀成矿研究中的应用-以川北砂岩型铀矿床为例[J].地质论评,51(4):401-408.
朱西养,汪云亮,王志畅,张成江.2004.川北砂岩型铀矿稀土元素特征及铀成矿作用[J].铀矿地质,20(2):71-79.
朱觉人,巫声扬,冯佩莘,王德生,马占文.1983.四川盆地北部中生代砂岩型铀矿床矿化特征与成因探讨[J].沉积学报,1(2):106-117.
张雪峰,刘晓东,刘剑钊.2011.广西花山花岗岩体地球化学特征及产铀潜力分析[J].地质与勘探,47(6):1051-1058.
Chen fenxong,Nie Fengjun,Zhang Chengyong.2016.Mesozoic structural styles and their relationship with uranium deposits in the southern margin of Yili basin[J].Geology and Exploration,52(3):480-488(in Chinese with English abstract).
Guo Ning,Sun Zexuan.2017.Types and prospecting direction of sandstone-type uranium deposits in the northern margin of the Sichuan Basin[J].Geology and Exploration,53(1):54-62(in Chinese with English abstract).
Huang Shijie.1994.Formation conditions and prospecting criteria for sandstone uranium deposit of interlayered oxidation type[J].Uranium Geology,10(1):6-13(in Chinese with English abstract).
Liu Bo,Yang Jianxin,Qiao Baocheng,Zhang Feng.2015.Characteristics of ore-controlling genetic facies and prospect prediction of sandstone-type uranium deposits in the Tengger depression,Inner Mongolia[J].Geology and Exploration,51(5):870-878(in Chinese with English abstract).
Liu Bo,Yang Jianxin,Qin Yanwei,Qiao Peng,Zhang Feng.2016.Research on the ore-controlling genetic facies of the sandstone type uranium deposits in the paleovalley of Saihan Formation of the Erlian basin[J].Geology and Exploration,52(6):1037-1047(in Chinese with English abstract).
Liu Jianhua,Zhu Xiyang.Wang Sili,Wei Jisheng.2005.Geologic-tectonic evolutional characteristics and prospecting potential for ISL-amenable sandstone-type uranium deposits in Sichuan basin[J].U-ranium Geology,21(6):321-330(in Chinese with English abstract).
Mo Banghong,Zhao Jianbo,Liu Xiulin,Qi Qinglin,Xie Bo.2013.The uranium mineralization type and prospecting direction of the Hengshan intrusive body in Miyi county of Sichuan Province[J].Geology and Exploration,49(6):1070-1077(in Chinese with English abstract).
Qiu Yuande,Tong Yunfu.1996.The application of active carbon method in sandstone uranium region of northern Sichuan[J].Journal of Chengdu Institute of Technology,23(2):113-116(in Chinese with English abstract).
Quan Zhi-gao,Zhang Jia-min,Sun Yan-huai,Zhang Fa,Ji Hai-jun.2011.Uranium mineralization characteristics of southwest TurpanHami basin and evaluation of metallogenic potential[J].Geology in China,38(6):1568-1575(in Chinese with English abstract).
Ren Zhongxian,Shen Pingxi,Chen Fengling.2014.Analysis on the geological features and ore-forming conditions at the southern margin of Erdos basin[J].World Nuclear Geoscience,31(3):514-528(in Chinese with English abstract).
Sun Zexuan,Guo Ning,Xiang Qinyou.1999.Analysis on metallogenic conditions and prospect of sandstone-type uranium deposits in Longchuan basin western Yunnan[J].Uranium Geology,15(2):65-66(in Chinese with English abstract).
Wu Shenyang,Wang Deshen,Ma zhanwen.1984.A preliminary study on the material composition and genesis of the 303 sandstone type uranium deposit bearing selenium[J].Uranium Geology,6(2):27-35(in Chinese with English abstract).
Wu Shengyang,Wang Desheng,Wang Shuhua.1988.Characteristics of pitchblende from the sandstone-type uranium deposit in north Sichuan and its metallogenetic time[J].Acta Mineralogica Sinica,8(4):365-373(in Chinese with English abstract).
Wu Rengui,Yu Dagan.2005.Discussion on relationship between sand body of braided stream channel sandstone-type uranium deposit[J].Uranium Geology,21(2):92-96(in Chinese with English abstract).
Zhu Xiyang,Wang Yunliang,Wang Zhichang,Zhang Chengjiang,Liu Jianhua.2005.Application of REE characteristics in the study of sandstone type uranium deposit:a case study of a uranium deposit in the northern Sichuan Basin[J].Geological Review,51(4):401-408(in Chinese with English abstract).
Zhu Xiyang,Wang Yunliang,Wang Zhichang,Zhang Chengjiang.2004.REE characteristics and uranium metallogengsis of sandstone-type uranium deposits in northern Sichuan[J].Uranium Geology,20(2):71-79(in Chinese with English abstract).
Zhu Jueren,Wu Shengyang,Feng Peixin,Wang Desheng,Ma zhanwen.1983.Preliminary study on the genesis of the Mesozoic sandstonetype uranium deposit in northern Sichuan basin[J].Acta Sedimentologica Sinica,1(2):106-117(in Chinese with English abstract).
Zhang Xuefeng,Liu Xiaodong,Liu Jianzhao.2011.Geochemical characteristics of the Huashan Granites in Gangxi Province and their uranium-bearing potential[J].Geology and Exploration,47(6):1051-1058(in Chinese with English abstract).
陈友良.1995.川北砂岩型铀矿床成矿条件及成矿模式探讨[J].四川地质学报,15(1):56-59.
陈奋雄,聂逢君,张成用.2016.伊犁盆地南缘中新生代构造样式与铀成矿关系[J].地质与勘探,52(3):480-488.
郭宁,孙泽轩.2017.川北砂岩铀矿类型及找矿方向[J].地质与勘探,53(1):54-62.
黄世杰.1994.层间氧化带砂岩型铀矿的形成条件及找矿判据[J].铀矿地质,10(1):6-13.
刘波,杨建新,乔宝成,张锋.2015.腾格尔坳陷砂岩型铀矿控矿成因相特征及远景预测[J].地质与勘探,51(5):870-878.
刘波,杨建新,秦彦伟,乔鹏,张锋.2016.二连盆地中东部赛汉组古河谷砂岩型铀矿床控矿成因相研究[J].地质与勘探,52(6):1037-1047.
刘建华,朱西养.王四利,魏继生.2005.四川盆地地质构造演化特征与可地浸砂岩型铀矿找矿前景[J].铀矿地质,21(6):321-330.
莫帮洪,赵剑波,刘秀林,齐清林,解波.2013.康滇地轴中段横山岩体的铀矿化类型与找矿方向[J].地质与勘探,49(6):1070-1077.
邱元德,童运福.1996.活性炭法在川北砂岩型铀矿勘探中的应用[J].成都理工学院学报,23(2):113-116.
权志高,张甲民,孙延怀,张发,姬海军.2011.吐哈盆地西南部铀矿化特征与成矿潜力评价[J].中国地质,38(6):1568-1575.
任中贤,申平喜,陈粉玲.2014.鄂尔多斯盆地南缘砂岩型铀矿地质特征及成矿条件分析[J].世界核地质科学,31(3):514-528.
孙泽轩,郭宁,向清友.1999.滇西陇川盆地砂岩型铀矿成矿条件及远景分析[J].铀矿地质,15(2):65-66.
巫声扬,王德生,马占文.1984.303含硒砂岩型铀矿床物质成分及矿床成因的初步研究[J].放射性地质,6(2):27-35.
巫声扬,王德生,王淑华.1988.川北砂岩型铀矿床中沥青铀矿特征及其成矿时代[J].矿物学报,8(4):365-373.
吴仁贵,余达淦.2005.辫状沉积砂体与砂岩型铀矿的关系剖析[J].铀矿地质,21(2):92-96.
朱西养,汪云亮,王志畅,张成江,刘建华.2005.REE地球化学在砂岩型铀成矿研究中的应用-以川北砂岩型铀矿床为例[J].地质论评,51(4):401-408.
朱西养,汪云亮,王志畅,张成江.2004.川北砂岩型铀矿稀土元素特征及铀成矿作用[J].铀矿地质,20(2):71-79.
朱觉人,巫声扬,冯佩莘,王德生,马占文.1983.四川盆地北部中生代砂岩型铀矿床矿化特征与成因探讨[J].沉积学报,1(2):106-117.
张雪峰,刘晓东,刘剑钊.2011.广西花山花岗岩体地球化学特征及产铀潜力分析[J].地质与勘探,47(6):1051-1058.
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