全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
地质学报  2006 

东胜砂岩型铀矿后生蚀变地球化学性质及其成矿意义

, PP. 740-747

Keywords: 地球化学,砂岩型铀矿,后生蚀变,同位素,流体作用,绿色蚀变,漂白蚀变

Full-Text   Cite this paper   Add to My Lib

Abstract:

东胜砂岩型铀矿具有大规模控矿绿色蚀变和漂白蚀变带、其氧化蚀变仅为蚀变残留等特征而与国内吐哈、伊犁盆地南缘等铀矿明显不同,从而引起人们的关注。本文通过对研究区该主要后生蚀变相关的地球化学研究,探讨了东胜矿床形成的特殊性:早期形成铀矿化的古层间氧化带在强还原性环境下,经二次还原作用改造形成了控矿的绿色蚀变带,二者皆具有低有机碳,低ΣS,高Th/U值的特征。铀矿化蚀变有机碳、δD、δ18O含量在各蚀变阶段中最高,Th/U值最低。分布于延安组顶部的漂白蚀变是表生氧化岩石在还原性环境下经还原改造形成,其Th/U值高,TFe含量低。总之,东胜矿床各种蚀变地球化学指标指示的矿床成因信息是,绿色蚀变和漂白蚀变及铀矿化的形成处于一种相对较强的还原性环境。在成岩作用,古氧化蚀变、漂白蚀变、绿色蚀变以及铀矿化的序列演化中,流体作用的物理化学性质或环境的过渡性转变出现在铀矿化阶段。对黄铁矿硫同位素以及砂岩碳酸盐胶结物碳、氧及其包裹体氢、氧同位素的分析,认为流体主要由大气降水、来自下部的煤成气以及与含矿目的层有机质脱羧基作用有关的有机酸混合组成。因而,东胜矿床的形成是无机―有机流体相互作用的结果。

References

[1]  丁万烈.2003.绿色蚀变带的地球化学性质及其找矿意义探讨.铀矿地质,19(5):277~282.
[2]  刘池洋,赵红格,王锋,陈洪.2005.鄂尔多斯盆地西缘(部)中生代构造属性.地质学报,79(6):737~747.
[3]  彭新建,王金平,等.2003.层间氧化带砂岩型铀矿床的铁物相特征及其地球化学意义--以伊犁盆地511矿床和吐哈盆地十红滩铀矿床为例.地质学报,77(1):120~125.
[4]  肖新建,李子颖,陈安平.2004.东胜地区砂岩型铀矿床后生蚀变矿物分带特征初步研究.铀矿地质,20(3):136~140.
[5]  吴伯林,徐高中,李卫红,等.2004.吐哈盆地地浸砂岩型铀矿成矿条件与盆地动力学演化.中国地质,31(1):101~107.
[6]  王恒纯.1990.同位素水文地质概论.北京:地质出版社,256.
[7]  张如良.2004.鄂尔多斯盆地深盆气与铀矿化关系初探.铀矿地质,20(4):213~218.
[8]  赵重远,刘池洋.1992.残延克拉通内盆地及其含油气性--以鄂尔多斯盆地和四川盆地为例.见:中国地质学会编."七五"地质科技重要成果学术交流会议论文选集.北京:北京科学技术出版社,610~613.
[9]  朱西养,汪云亮.2003.东胜砂岩型铀矿微量元素地球化学特征初探.地质地球化学,31(2):39~45.
[10]  Ding W L.2003.Geochemical character of green-color alteration and its prospecting significance.Uranium Geology,19(5):277~282(in Chinese with English abstract).
[11]  Liu J M,Liu J J,Gu X X.1997.Basin fluids and their related ore deposits.Acta Petrologoca et Mineralogica,16 (4):341 ~ 352 (in Chinese with English abstract).
[12]  Peng X J,Wang J P,et al.2003.Characteristics and geochemical significance of the ferrum phases in the Shihongtan inter layeredoxidation zone sandstone type uranium deposit.Acta Geological Sinica,77(1):120~125(in Chinese with English abstract).
[13]  Sun Y,Li Z Y,Xiao X J,et al.2004.Relationship between oil-gas trap and uranium metallogenesisat northern Ordos basin.Uranium Geology,20(6):337~343(in Chinese with English abstract).
[14]  Xiao X J,Li Z Y,Chen A P.2004.Preliminary study on features of mineralogical zoning of epigenetic alteration at sandstone type uranium deposit,Dongsheng area,Ordos basin.Uranium Geology,20(3):136~140(in Chinese with English abstract).
[15]  Wu R G,Chen A P,et al.2003.Analysis on depositional system and discussion on ore-formation conditions of channel sandstone type uranium deposit-taking Dongsheng area,Ordos Meso-Cenozoic basin as an exampl.Uranium Geology,19 (2):94 ~ 99 (in Chinese with English abstract).
[16]  Wu B L,Quan Z G,et al.2005.Basic geological and geochemical characteristics of sandstone type uranium deposits in southwestern margin of Turpan-Hami Basin.Mineral Deposits,24 (1):32 ~ 43(in Chinese with English abstract).
[17]  Zhang R L.2004.Uranium metallogenic conditions and prospecting direction in Jiulongzhang volcanic basin.Uranium Geology,20(4):213~218(in Chinese with English abstract).
[18]  Zhao L S,Zhang B R.1987.Geochemistry.Beijing:Geol.Pub.House (in Chinese with English abstract).
[19]  吴柏林.2005.中国西北地区中新生代盆地砂岩型铀矿地质与成矿作用.西北大学博士学位论文.
[20]  戴金星,陈项.1993.中国生物气中烷烃组合的碳同位素特征及其鉴别标志.中国科学,23(3):43~47.
[21]  刘建明,刘家军,顾雪祥.1997.沉积盆地中的流体活动及其成矿作用.岩石矿物学杂志,16(4):341~352.
[22]  闵茂中,王汝成,等.2003.层间氧化带砂岩型铀矿中的生物成矿作用.自然科学进展,13(2):164~168.
[23]  孙晔,李子颖,肖新建,等.2004.油气圈闭与鄂尔多斯盆地北部铀成矿关系探讨.铀矿地质,20(6):337~343.
[24]  吴仁贵,陈安平,等.2003.沉积体系分析与河道砂岩型铀矿成矿条件讨论--以鄂尔多斯中新生代盆地东胜地区为例.铀矿地质,19(2):94~99.
[25]  吴伯林,权志高,等.2005.吐哈盆地西南缘砂岩型铀矿地质地球化学基本特征.矿床地质,24(1):32~43.
[26]  张理刚.1985.稳定同位素在地质科学中的应用.西安:陕西科学技术出版社.
[27]  赵伦山,张本仁.1987.地球化学.北京:地质出版社.
[28]  郑永飞,陈江峰.2000.稳定同位素地球化学.北京:科学出版社.
[29]  Dai J X,Chen Y.1993.The characteristics of carbon isotopic and the sign to discrimination of alkyl combination in biogas,China.Science in China,23 (3):43 ~ 47 (in Chinese with English abstract).
[30]  Min M Z,Wang N C,et al.2003.Effect of biology on sandstone-type uranium mineralizations in interlayer oxidation zone in deposit.Natural Science Evolve,13 (2):164 ~ 168 (in Chinese with English abstract).
[31]  Rollinson H R.1993.Using Geothemical Data:Eevaluation,Presentation,Interpretation.London:Longman Scientific Techical Press,1~352.
[32]  Wu B L,Xu G Z,Li W H,et al.2004.Metallogenic conditions of insitu-leachable sandstone type uranium deposit and dynamic evolution in the Turpan-Hami basin.Geology in China,31(1):101 ~ 107 (in Chinese with English abstract).
[33]  Wang H C.1990 Generality of isotopic hydrogeology.Beijing:Geol.Pub.House.
[34]  Zhang L G.1985.The application of stable isotopes in geology.Shanxi:Shanxi Technology Press.
[35]  Zhao Z Y,Liu C Y.1992.Basins in the residual craton and their petroleum prospect-example with Ordos Basin and Sichuan Basin.In:China Geology Academy,ed.Dissertation Anthology at the Academic Connunion Conference in" Seven-Five" Geology Technological Important Fruits.Beijing:Science and Technology Publishing Company,610 ~ 613 (in Chinese with English abstract).
[36]  Zhen Y F,Chen J F.2000.Geochemistry of stable isotope.Beijing:Science.Pub.House(in Chinese with English abstract).
[37]  Zhu X Y,Wang Y L.2003.Trace element geochemistry of sandstonetype uranium deposits in Dong sheng area.GeologyGeocheminstray,31 (2):39 ~ 45 (in Chinese with English abstract).
[38]  邸领军,姜英昆,等.2004.鄂尔多斯盆地喜山期构造运动与油气成藏研究.长庆油田分公司开发研究院.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133