二连盆地脑木根凹陷沉积型铀矿成矿特征
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摘要
二连盆地乌兰察布坳陷是我国重要的沉积型铀矿成矿区,脑木根凹陷为二连盆地乌兰察布坳陷南缘的一个次级凹陷,其中的下白垩统赛汉组沉积了一套三角洲-湖泊相含煤碎屑岩建造,具备铀成矿基本条件。通过对煤田钻孔资料"二次开发",配合钻探验证,在下白垩统赛汉组中圈定了连续稳定的放射性异常区。发现了潜水氧化型和同沉积泥岩型铀矿成矿类型,研究区铀矿化主要受古气候、成矿期砂体沉积特征、铀源、后生氧化作用等多重因素的控制。建立了研究区潜水氧化叠合同沉积泥岩型铀矿成矿模式。
The Ulanqab depression in the Erenhot Basin is a significant sedimentary uranium metallogenic province in the country,while the Nomgen depression is a secondary depression in southern part of Ulanqab depression. The lower Cretaceous Saihan Formation in Nomgen depression has deposited a set of delta-lacustrine facies coal-bearing clastic rock formation with basic uranium metallogenic conditions. Through the"further utilization"of coalfield drilling data cooperating with drilling verification have delineated continuously stable radioactive abnormal places in Saihan Formation. Thereout have found phreatic oxidization and synsedimentary mudstone uranium metallogenic types. Uranium metallogenic in study area is mainly controlled by multiple factors including paleoclimate,sedimentary features of sand mass during metallogenic epoch,uranium source,epigenetic oxidation etc. The study has established phreatic oxidation superimposed by synsedimentary mudstone uranium metallogenic model in the area.
The Ulanqab depression in the Erenhot Basin is a significant sedimentary uranium metallogenic province in the country,while the Nomgen depression is a secondary depression in southern part of Ulanqab depression. The lower Cretaceous Saihan Formation in Nomgen depression has deposited a set of delta-lacustrine facies coal-bearing clastic rock formation with basic uranium metallogenic conditions. Through the"further utilization"of coalfield drilling data cooperating with drilling verification have delineated continuously stable radioactive abnormal places in Saihan Formation. Thereout have found phreatic oxidization and synsedimentary mudstone uranium metallogenic types. Uranium metallogenic in study area is mainly controlled by multiple factors including paleoclimate,sedimentary features of sand mass during metallogenic epoch,uranium source,epigenetic oxidation etc. The study has established phreatic oxidation superimposed by synsedimentary mudstone uranium metallogenic model in the area.
引文
[1]焦养泉,吴立群,彭云彪,等.中国北方古亚洲构造域中沉积型铀矿形成发育的沉积-构造背景综合分析[J].地学前缘,2015,22(1):189-205.
[2]张金带,徐高中,林锦荣,等.中国北方6种新的砂岩型铀矿对铀资源潜力的提示[J].中国地质,2010,37(5):1434-1449.
[3]聂逢君,李满根,邓居智,等.内蒙古二连裂谷盆地“同盆多类型”铀矿床组合与找矿方向[J].矿床地质,2015,34(4):711-729.
[4]聂逢君,李满根,严兆彬,等.内蒙古二连盆地砂岩型铀矿目的层赛汉组分段与铀矿化[J].地质通报,2015,34(10):1952-1963.
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[8]金若时,黄澎涛,苗培森,等.准噶尔盆地东缘侏罗系砂岩型铀矿成矿条件与找矿方向[J].地质通报,2014,33(z1):359-369.
[9]吴兆剑,韩效忠.煤田资料的铀矿二次开发技术及其找矿意义---以二连盆地ZS煤田铀矿点的发现为例[J].中国地质,2016,43(2):617-627.
[10]漆家福,赵贤正,李先平,等.二连盆地早白垩世断陷分布及其与基底构造的关系[J].地学前缘,2015,03:118-128.
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[14]宋霁,焦养泉,吴立群,等.湖相泥岩型铀矿有利成矿条件分析[J].地质科技情报,2015,34(5):120-126.
[15]李洪军,申科峰,聂逢君,等.二连盆地中新生代沉积演化与铀成矿[J].东华理工大学学报(自然科学版),2012,35(4):301-308.
[16]赵岳,徐强,梁叶萍,等.内蒙古二连盆地呼仁布其凹陷白垩系铀矿化特征与找矿远景[J].中国地质,2018,45(01):168-177.
[17]Bonnetti C,Malartre F,Huault V,et al.Sedimentology,stratigraphy and palynological occurrences of the late Cretaceous Erlian Formation,Erlian Basin,Inner Mongolia,People's Republic of China[J].Cretaceous Research,2014,48:177-192.
[18]陈功,等.二连盆地及邻区铀成矿地质条件及成矿远景评价[J].中国科技报告.1997(S1).
[19]Dahlkamp F J.Uranium Deposits[M].Berlin:SpringerVerlag,1993.
[2]张金带,徐高中,林锦荣,等.中国北方6种新的砂岩型铀矿对铀资源潜力的提示[J].中国地质,2010,37(5):1434-1449.
[3]聂逢君,李满根,邓居智,等.内蒙古二连裂谷盆地“同盆多类型”铀矿床组合与找矿方向[J].矿床地质,2015,34(4):711-729.
[4]聂逢君,李满根,严兆彬,等.内蒙古二连盆地砂岩型铀矿目的层赛汉组分段与铀矿化[J].地质通报,2015,34(10):1952-1963.
[5]旷文战,蔡彤,严兆彬.内蒙古二连盆地乌兰察布坳陷白垩系特征及铀成矿类型[J].东华理工大学学报(自然科学版),2014,37(2):111-121.
[6]刘波,杨建新,彭云彪,等.二连盆地中东部含铀古河谷构造建造及典型矿床成矿模式研究[J].矿床地质,2017,36(1):126-142.
[7]金若时,覃志安.中国北方含煤盆地砂岩型铀矿找矿模式层序研究[J].地质调查与研究,2013(2):81-84.
[8]金若时,黄澎涛,苗培森,等.准噶尔盆地东缘侏罗系砂岩型铀矿成矿条件与找矿方向[J].地质通报,2014,33(z1):359-369.
[9]吴兆剑,韩效忠.煤田资料的铀矿二次开发技术及其找矿意义---以二连盆地ZS煤田铀矿点的发现为例[J].中国地质,2016,43(2):617-627.
[10]漆家福,赵贤正,李先平,等.二连盆地早白垩世断陷分布及其与基底构造的关系[J].地学前缘,2015,03:118-128.
[11]Zelt F B.Natural gamma-ray spectrometry,lithofacies,and depositional environments of selected upper Cretaceous marine mudrocks,western United States,including tropic shale and tununk member of Mancos shale[J].1985.
[12]Schmoker.Determination of Organic-Matter Content of Appalachian Devonian Shales from Gamma-Ray Logs[J].Aapg Bulletin,1981,65(7):1285-1298.
[13]权志高,徐高中.中国北西部地区砂岩型铀矿含矿建造及找矿前景[J].地质学报,2012,86(2):307-315.
[14]宋霁,焦养泉,吴立群,等.湖相泥岩型铀矿有利成矿条件分析[J].地质科技情报,2015,34(5):120-126.
[15]李洪军,申科峰,聂逢君,等.二连盆地中新生代沉积演化与铀成矿[J].东华理工大学学报(自然科学版),2012,35(4):301-308.
[16]赵岳,徐强,梁叶萍,等.内蒙古二连盆地呼仁布其凹陷白垩系铀矿化特征与找矿远景[J].中国地质,2018,45(01):168-177.
[17]Bonnetti C,Malartre F,Huault V,et al.Sedimentology,stratigraphy and palynological occurrences of the late Cretaceous Erlian Formation,Erlian Basin,Inner Mongolia,People's Republic of China[J].Cretaceous Research,2014,48:177-192.
[18]陈功,等.二连盆地及邻区铀成矿地质条件及成矿远景评价[J].中国科技报告.1997(S1).
[19]Dahlkamp F J.Uranium Deposits[M].Berlin:SpringerVerlag,1993.