辽东地区中酸性岩体铀成矿规律探讨及成矿靶区预测
详细信息    本馆镜像全文|  推荐本文 |  |   获取CNKI官网全文
摘要
本文依托中国核工业地质局铀资源区域评价项目—“辽东预测工作区铀矿资源潜力评价”开展研究。论文大量搜集和系统整理分析了研究区的各类资料,并结合最新的研究成果,通过构建区域综合成矿模式,借助于计算机技术,实现了铀资源成矿靶区的预测。
     辽东地区铀资源成矿潜力预测、评价以地质理论为指导,深入开展区域地质构造环境及成矿规律的研究,总结重要典型矿床的成矿规律和铀矿化特征,在构建了辽东地区连山关和赛马两个重要矿床成矿模式的基础上,深入把握研究区成矿地质特征,构建了区域成矿模式图;充分挖掘地质、物探、化探及航磁、航放等综合找矿信息。以MapGIS和MRAS软件为技术平台,在提取地、物、化、遥以及航放等综合信息的基础上,运用数理统计分析的方法,筛选出混合花岗岩体、赋矿地层、含矿和控矿构造、航空放射性铀偏高场、水系沉积物氧化钾异常区和铀矿床(点)异常点,六条预测要素,利用特征分析法以及证据权法对研究区内有利铀成矿地段进行预测。
     依据圈定靶区的基本原则和规范步骤,初步圈定出有利成矿地段22片。后结合研究区实际成矿地质条件和野外调查资料,对靶区进行优选及合并,最终圈定远景区13片。按照成矿概率大小和实地的矿化线索,将其分为A、B、C类,其中A类靶区4片、B类靶区5片、C类靶区4片。A类靶区分布于已知矿床深部或外围,是找矿潜力最好的地段;B类靶区的各成矿要素配套齐全,部分有矿点或矿化点出现,是找矿潜力较有利的地段;C类靶区各成矿地质条件较好且位于航空放射性铀高场,但无矿化线索,具有一定的成矿潜力。
     在对整个区域的地质情况研究过程中,取得了以下几点认识:
     1、研究区内地质演化复杂,矿床类型多样,铀矿床有单铀型矿床(连山关)、铀—钍—稀土混合岩矿床(赛马)、铀铁型矿床(高家沟、弓长岭矿床)。此外,区域上还分布有金、银、铅锌等矿种。
     2、辽东地区与中酸性岩体有关的铀成矿类型可分为两种:(1)花岗岩外带型:包括连山关、高家沟、玄岭后等矿床;(2)碱性岩型:主要为赛马矿床。
     3、铀成矿主要有2期,第一期为1900Ma,主要成矿类型为花岗岩外带型;第二期为210Ma,主要成矿类型为碱性岩型。
     4、本区明显存在着南部和北部两条东西向铀成矿带:与中酸性岩体成矿有关的为北带,鞍山-弓长岭-步达远构造成矿带,它是区内最重要的铀成矿带,控制了辽东地区的全部铀矿床。两条构造成矿带与“辽东裂谷”的南北边界相一致,其实质也就是裂谷边缘的深断裂控制了铀成矿带的分布。
     5、研究区花岗岩外带型铀矿化受太古代混合岩化花岗岩控制,主要分布在岩体内外接触带。
     6、碱性岩型铀矿化产于赛马碱性杂岩与辽河群大理岩的接触内带,主要赋存于草绿色霓霞正长岩中,其次是碱性矽卡岩。
Rely on by the project, Uranium Potential Evaluation and Prospective Prognosis in Liaodong metallogenic belt from China Nuclear Geological Bureau, the paper has collected and studied a lot of geological data about study area. Combine the latest research achievements, establish integrated regional mineralization model, assess metallogenic potential and prospecting target area prognosis with computer software.
     Uranium Potential Evaluation in Liaodong metallogenic belt guided by the geological theory, making a study of geological environment, characteristic of uranium mineralization and metallogenic regularity at regional level. The paper has in the basis of summarized characteristics of Lianshanguan typical deposits and Saima typical deposits, established mineralization model of study area. Furthermore, analyzing such a wide range of data as geological, geophysical, geochemical and aeromagnetic data, etc. The software of MapGIS and MRAS serving as a basic platform, by the method of mathematical statistics analysis. These factors involve controlling-containing ore structures, uranium-rich strata and rocks, uranium deposits, uranium point and abnormal of airborne radiation. etc. Eventually, use the method of Characteristic Analysis and Weight of Evidence to positioning and evaluating metallogenic potential of study areas.
     Following the basic principles and instructions, the paper has delineated 22 favorable targets by means of Characteristic Analysis. Considering the actual geological conditions and field survey, the paper has in fact gotten 13 targets after winnowed. Besides, according to ore-forming probability and mineralization clues, the targets have been classified into three levels of A, B and C. Thus,4 pieces of targets lie in A category,5 pieces in B, and 4 pieces in C. The targets in the A appear the most favorable, which are mostly distributed around or outside the known deposits, whereas those within the B have relatively better conditions with all sorts of metallogenic factors and ore points, those within the C being potential to some extent.
     We have some following understanding, in work process, on the whole area geological conditions:
     1. Study area have complex geological evolution and diversity ore types, uranium deposit including single uranium type (Lianshanguan), Uranium - thorium - rare earth mixed rock ore deposits (Saima), Iron type uranium deposits (Gaojiagou,Gongchangling). In addition, regional also distribution gold, silver, lead, zinc, etc .
     2. There are two kinds mineral type in intermediate-acid rock of Liaodong area:(1) Granite take-out type include Lianshanguan,Gaojiagou,Xuanlinghou etc. (2) Alkaline rock type include Saima.
     3. There are two Uranium metallogenic times,first time is 1900Ma, Main is Granite take-out type.Second time is 210Ma, Main is Alkaline rock type.
     4. There are two Uranium metallogenic belt: North belt and South belt. North belt have a close relationship with intermediate-acid rock metallogenic, It is name metallogenic belt. It controls all uranium deposits in Liaodong area. The two tectonic mineralization belt are consistent with two borders of Liaodong rift ,The essence is the Liaodong rift deep fault control the distribution of Uranium metallogenic belt.
     5. Granite take-out type of uranium mineralization in research area be controlled with Archaeozoic era mix granite,mainly distributed in internal and external contact belt.
     6. Alkaline rock type of uranium mineralization Originate in inside belt which Saima alkaline rock contact with Liaohe group of marble, Mainly occur in Viridans syenite.
引文
Adams S.S. and Smith R.B..Geology and recognition criteria for sandstone uranium deposits in mixed fluvial shallow marine sedimentary sequences,South Texas final report: U.S. Department of Energy,Grand Junction Office,Colorado, Bendix Field Engineering Corporation,GJBX-4(81),1981,146.
    Agterberg FP,Bonhmn一CarterGF,Wright DF. Statistical pattern Integration for Miner Exploration [A].In:Gaalq Merrimn DF eds. Computer Applications for Mineral Exploration in Resource Exploration,Oxford: Pergamon Press[C].1990,1~21.
    Bonham-Carter,G.F. Agterberg,F.P. and Wright, D.F., weights of evidence modeling: a new approach to mapping mineral potential: In Statistical Applications in the Earth Sciences,Eda.F.P. Agterberg and G.F. Bonham-Carter, Geological Survey of Canada, 1989, Papper 89~9,p.171~183.
    Davis J.F. Uranium in the USA: Genesis and Exploration Implications. Philosophical Transactions of the Royal Society of London. Series A,Mathematical and Physical Sciences,1979,Vol.291(1381):301~306.
    Dickinson K. A. and J.S. Duval. South Texas Uranium: Geologic Controls,Exploration Techniques,and Potential,Chapter 2:Trend Areas and Exploration Techniques Utilization in Geology of Alternate Energy Resources in the South-Central United States (M.D. Campbell(ed)),Houston Geological Society,1977,45~66.
    Goldhaber M.B.,Reynolds R.L,Rye R.Otigin of a South Texas roll-type uranium deposits: II. Petrology and sulfur isotope studies. Economic Geology,.1978,73(8):1690~1705.
    Harshman E.N.1972.Geology and uranium deposits,Shirley Basin area,Wyoming: US Geological Survey Professional Paper 745,p.82.
    Harshman E.N. and Adams S.S..Geology and recognition criteria for roll-type uranium deposits in continental sandstones Final report: US Department of Energy,Grand Junction,Colorado,GJBX-1(81),.1980,p.181.
    Harshman E .N.,Adams S.S. Geology and Recognition Criteria for Roll-Type Uranium Deposits in Continental Sandstones. Colorado: US Department of Energy,Grand Junction Office,1981,p.185.
    Holen H.K. et al. Geological characterization of New Mexico uranium deposits for extraction by In Situ Leach recovery, New Mexico Bureau of Mines and Mineral Resources, Open File Report 1986,No.251.
    Mc Cammon, R.B.,Prospector II-the redesign of Prospector: AI Systems in Government, March 27~31,1989, Washington,D.C.,1989,p 88~92.
    OECD(NEA)/IAEA Uranium Resources,Production and Demand,OECD,Paris:1993,1995,1997,1999,2001,2003.
    Pollock GD,McArthur River Project,Saskatchewan,Canada,Proceedings of a Technical Committee Meeting Assessment of Uranium Deposit Types and Resources a worldwide Perspective IAEA,Vienna,2001.
    白瑾,等.华北陆台北缘前寒武纪地质及铅锌成矿作用[M].北京:地质出版社,1993.
    北京铀矿地质研究所赛马矿床研究组.我国东北赛马碱性岩体中的铀矿床[J].中国科学,1977,5:466~487.
    陈晋镳,武铁山.华北区区域地层[M].武汉:中国地质大学出版社,1997.
    陈荣度,李显东,张福生.对辽东古元古代地质若干问题的讨论[J].中国地质,2003,5,30(2).
    陈毓川,王登红,徐志刚等.全国重要矿产和区域成矿规律研究技术要求[S].国土资源部. 2007.
    陈毓川,朱裕生.中国矿床成矿模式[M].北京:地质出版社, 1993.
    陈毓川.中国成矿体系与区域成矿评价[M].北京:地质出版社,2006.
    程裕淇.中国区域地质概论[M].北京:地质出版社. 1994.
    杜乐天.中国热液铀矿基本成矿规律和一般热液成矿学[M].北京:原子能出版社,2001.
    杜乐天.我国花岗岩型铀矿的主要地质规律及成矿模式[M].花岗岩型铀矿论文集.北京:原子能出版社,1982
    范洪海,何德宝,王健,等.辽东预测工作区铀矿资源潜力评价报告[R].北京:核工业北京地质研究院,2010. *
    范洪海,凌洪飞,沈渭洲,等.相山火山-侵入杂岩Nd-Sr-Pb同位素地球化学特征[J].岩石学报,2001,17(3):395~402.
    范洪海,王德滋,刘昌实,等.江西相山潜火山岩中岩浆包体的发现及其成因机制探讨[J ].地质学报, 2001,75 (1):64~69.
    郭智添.辽宁连山关早前寒武纪铀矿床地质特征及成矿模式[J].长春地质学院学报(增刊),1982.
    郝德峰,李三忠.辽吉地区古元古代花岗岩成因及对构造演化的制约[J].岩石学报,2004,020(06).
    姜春潮.辽吉东部前寒武纪地质[M].沈阳:辽宁科学技术出版社,1987.
    金景福,黄广荣.铀矿床学[M].北京:原子能出版社,1991.
    景立珍,郭裕嘉,丁彩霞.辽宁赛马碱性岩的年代学及碱性岩浆的形成[J].辽宁地质,1995,4:257~271.
    李巨初,罗朝文,童纯菡等.连山关铀矿床稀土元素地球化学特征[J].成都地质学院学报,1986,3(14):1~10.
    李万元,邹吉斌,等. 3075地区综合信息铀成矿预测[R]. 241大队科研报告,1991.*
    李万元. 3075矿床富矿体形成条件[J].东北铀矿地质,1986,2:12~31.
    李月湘,燕辽成矿带斑岩型铀矿床地球化学特征和找矿意义[J].矿物岩石地球化学通报,2009,第28卷增刊.
    辽宁省地质矿产局.辽宁省区域地质志[M].北京:地质出版社,1989.
    刘德正.辽东连山关地区早元古代富铀矿床的主导赋矿因素与找矿方向[J].铀矿地质,1990,6(4).
    刘国平,艾永富.辽东地区元古宙花岗岩类型和地质地球化学特征[C ].见:北京大学国际地质科学学术讨论会论文集,北京:地震出版社,1998.
    罗毅等,燕辽地区火山热液型铀、金、多金属矿床成矿特征及分布规律[M].北京:原子能出版社,1997.
    孙立军,张永红,于金辉,等.辽宁东部凤城碱性岩体的地质特征及形成时代探讨[J].辽宁省交通高等专科学校学报,2008,10(4):41~44.
    孙远强,范洪海,赵永安,等.基于MRAS的河草坑铀矿田靶区圈定[J].铀矿地质,2010,26(3):172~177.
    曲洪祥,张永,雷广新,等.试论辽东地区古元古代壳一幔混合杂岩[J].辽宁地质,2000,17.
    王驹,杜乐天.早元古代连山关铀矿床的地质地球化学特征[J].铀矿地质,1988,4(6).
    王驹. 3075矿床成矿物化条件和富矿成因[D].研究生论文,1987.
    王从周.中国花岗岩型铀矿床地质特征[M].北京:原子能出版社,1985.
    王健. Excel表格直接转换为MapGis中报表的方法[J].地理空间信息,2010,10:144~145.
    王文广,胡绍康,等.华北地台东部下元古界区域铀矿地质特征及成矿远景预测[M].北京:核工业北京地质研究院,1987.
    王文广,陶铨,涂江汉,等.辽东海城-鞍山-八河川地区区域铀成矿地质特征及其成矿远景评价[M].北京:核工业北京地质研究院,1993.
    王文广,王驹.连山关铀矿床特殊的工业铀矿物组合及其特征和意义[J].铀矿地质,1991,7(4):196~205.
    王文广等.辽东中部地区铀矿地质特征及其成矿远景评价[R].北京:核工业北京地质研究院. 1974. *
    王正邦等,燕辽成矿带西段火山盆地铀成矿条件及远景评价[M].北京:地质出版社,1997.
    吴福元,路孝平,林景仟,等.辽东半岛南部早前寒武纪花岗质岩浆作用的年代学格架[J].地质科学,2004,39(l).
    吴珍汉,孟宪刚.燕辽陆内造山带金-多金属成矿作用与构造-成矿关系[M].北京:地质出版社,1998.
    夏毓亮,韩军.中国最古老铀矿床成矿年龄及铅同位素示踪铀成矿省[J].地球学报,2008,29(6).
    余达淦、吴仁贵、陈培荣.铀资源地质学[M].哈尔滨:哈尔滨工程大学出版社,2007.
    于津生,周新华.鞍山-连山关地区放射性矿床同位素地质研究及其在找矿、评价中的意义[R].中科院地质所,1965. *
    于津生,周新华.辽东地区同位素地质研究[M].北京:中科院地质所,1965.
    章邦桐.花岗岩物理化学及铀成矿作用[M].北京:原子能出版社,1992.
    中国人民解放军二0一师、六0一团. 422碱性岩铀矿床成矿规律初步认识[R].北京:内部资料,1973. *
    中国人民解放军二0一师、六0一团.赛马矿床联合科研组1970~1974年工作总结报告[R].北京:内部资料,1975. *
    中国人民解放军沈字711部队,北京第三研究所.某碱性岩体放射性、稀有元素综合矿床成矿特征[R].北京:内部资料,1972. *
    张家富. 3075铀矿床成矿作用研究[R].北京:核工业北京地质研究院,1990. *
    周玲棣,赵振华,周国富.我国一些碱性岩的同位素年代学研究[J].地球化学,1996,25(2):164~171.
    张秋生.辽东半岛早期地壳与矿床[M].北京:地质出版社,1988.
    张金带,李友良,简晓飞等.“十五”期间铀矿地质勘查主要成果及“十一五”的总体思路[J].铀矿地质.2007.
    张振强,曲先良.辽东不整合脉超大型铀矿床找矿前景分析[J].地质与资源,2001,10(3):172~175.
    钟家蓉.连山关地区下元古界中混合交代作用与铀成矿的关系[J].矿床地质,1983,2.
    邹吉斌,沙德喜,李准哲,等.辽东半岛地区铀矿资源合作勘查报告[R]. 241大队科研报告,1999. *
    张万林.铀矿地质简明教程[M].北京:原子能出版社,1987.
    赵振华,周玲棣.我国某些富碱侵入岩的稀土元素地球化学[J].中国科学(B辑),1994,24(10):1109~1120.

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700