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1.
内蒙古巴彦宝力道金矿区物化探综合找矿方法及其应用 总被引：1，自引：0，他引：1
巴彦宝力道金矿区位于内蒙古苏尼特左旗,区内发育与金矿化有关的破碎蚀变带和糜棱岩化带。通过研究地质及物化探工作成果,建立本区地球物理、地球化学成矿模式,采用相关分析和"格氏法"等方法,确定了矿床元素轴向分带序列为:As Sb Hg Bi Li Sr Ba Ag Pb Au Cu Zn Sn V Co Cr Ni Ti Mo W,前缘晕元素为As、Sb、Hg、Bi,主成矿元素为Au、Cu、Zn,尾晕元素为Ti、Mo、W。据轴向分带特征,确定金矿体剥蚀程度的判别指标为w(As)×w(Sb)×w(Bi)/w(Ti)×w(Mo)×w(W)。建立了找矿标志,为下一步地质找矿提供了依据。 相似文献
2.
云南个旧矿区南部矿床原生晕垂直分带研究——以龙树脚矿段为例 总被引：5，自引：2，他引：5
矿床原生晕的垂直分带研究是寻找隐伏矿体和盲矿体的有效方法之一。本文通过对 30余种元素的分析 ,研究元素的分带指数、变化系数和变化指数梯度差 ,由此得出矿床原生晕由上至下的垂直分带为 :Mn Cd Zn Sn Cu Au Hg As( 1 82 0中段 ) ;Bi W Co Sb( 1 730中段 ) ;Mo Y( 1 70 0中段 ) ;Ni V Nb Sr La Sc Ti Yb Be Ag( 1 6 4 0中段 ) ;Pb Ga B Ba( 1 5 2 0中段 )。 30种元素的分带序列为 :Mn Ag1 Pb1 Cd Zn Sn Cu Au Hg As Bi W Co Sb Mo Y Ni V Nb Sr Cr La Sc Ti Yb Be Ag2 Pb2 Ga B Ba。 相似文献
3.
大金山地区富集W、Sn、Bi、Mo、Pb、Zn、Ag、Au,但分布不均匀,具有叠加富集特征,按个元素异常下限进行异常划分,获得综合异常规模较大,呈环状分布,出现多个浓集中心。结合各矿床(点)成矿特征,认为大金山地区以"穹隆"为中心,成矿元素自内向外依次形成有规律的水平分带:W、Sn、Bi→Sn→Sn、Pb、Zn、Ag→Ag、Pb、Zn(Au)→Au。上述规律为该区进一步找矿勘探提供了重要的理论支持。 相似文献
4.
内蒙花敖包特Pb-Zn-Ag多金属矿床原生晕分带特征与深部矿体预测模型 总被引：4，自引：1，他引：3
花敖包特Pb-Zn-Ag多金属矿床构造上位于滨西太平洋成矿域内蒙古大兴安岭成矿带南段, 是一个近年来发现的与白垩纪早期构造岩浆活动有关的隐伏热液脉状矿床.研究表明: (1)矿体原生晕发育, 且分带明显.据其异常强度建立的元素横向分带顺序(从强到弱)为Cd→Pb→Zn→Ag→Sb→In→Hg→As→Cu→Sn→W→Mo→Bi, 排在序列前面的Cd、Pb、Zn、Sb、Ag等5种元素, 可作为远矿指示元素; 排在序列后端的As、Bi、Mo、W等4种元素, 可作为近矿指示元素.(2)根据Grigorian原生晕分带计算方法, 获得矿体原生晕轴向分带序列(自矿体头部至尾部)为Sb→Pb→Cd→Ag→Zn→Hg→Cu→In→As→Bi→Sn→Mo→W, 与Grigorian建立热液矿床标准分带基本一致.(3)构建深部矿体找矿模型, 其预测评价指标(Sb×Pb×Cd×Ag)D/(As×Sn×Mo×W)D在矿体头部为1.30、矿体中上部为0.35、矿体中下部为0.056、矿体尾部为0.005, 这表明该指标随深度的增加有规律地降低, 是预测深部矿体资源潜力的有效指标. 相似文献
5.
《西北地质》2016,(4)
西藏隆子县恰嘎锑矿位于藏南错美-隆子锑金成矿带中东部,该区成矿条件有利,是找锑铅锌的良好靶区。研究表明:1矿体原生晕发育,且分带明显。2结合原生异常分布态势及其与矿体的关系,成晕组分可以分为:前缘元素(Cd、Hg、As)、近矿元素(上部为Pb、Zn,中部为Sb,下部为Cu、Au、Ag)、尾晕元素(Mn、Bi、Mo、W、Sn)。3对该区利用浓集中心法和分带指数法分别求出了相近的分带序列:Pb-Zn-Mn-Bi-Mo-W-Sn-Cd-Hg-As-Sb-Cu-Au-Ag-Ba。4深部找矿方面,矿体很大可能向深部继续延伸或有盲矿体存在,且该矿床为热液型矿床。5在原生晕系统研究的基础上构建了深部矿体评价的指标(Cd×Hg×As×Sb)D/(Bi×Mo×W×Sn)D,数据表明该指标随深度的增加有规律地降低,是预测深部矿体资源潜力的有效指标。 相似文献
6.
在河南省桐柏县刘山岩铜锌多金属矿区开展深部及外围预查,对矿床进行了地球化学异常特征及评价标志研究.矿床的异常元素组合主要为Cu、Zn、Pb、Ag、Ba、Mo、Cd;次为Mn、Bi、As、Ga、Ge、V、W;矿床实用元素轴向分带序列由上至下依次为Cu-Zn-As-Ga-Ag-Pb-Mo.同时,根据已知矿和非矿异常特征、元素组合及分带特征、元素比值特征等建立了矿床的找矿评价地球化学标志. 相似文献
7.
《矿产与地质》2020,(3)
总结了湖南汝城县蕴坪矿区的地质特征,并对该区1∶1万土壤地球化学测量元素含量特征及元素组合特征进行了研究,认为该区Ag、Pb、Zn、W、Sn、Mo、Bi等地球化学异常显示明显,其中Pb、Zn、W为矿区主成矿元素。Ag、Pb、Zn、W、Sn、Mo、Bi异常强度大、分带好、浓集中心和峰值明显,异常范围受区内断裂构造破碎带、棋梓桥地层等控制。在矿区内圈定出YP1～YP3三个预测靶区,通过槽探及钻探工程验证于YP1和YP2内发现了Pb-Zn-1号铅锌矿体,在YP3内发现了Pb-Zn-2号铅锌矿体。结合矿区地质成矿条件和土壤地球化学异常特征,初步总结了蕴坪矿区铅锌矿找矿标志,为该区进一步找矿提供了指导。 相似文献
8.
罗卜岭矿床是与晚中生代花岗闪长斑岩体有关的隐伏斑岩型铜钼矿床, 矿区位于紫金山矿田的东北部; 铜钼矿体主要产于绿泥石化-绢英岩化和(弱)钾化-绢英岩化带中, 矿石矿物组合为黄铜矿+辉钼矿; 少量过渡类型矿体产于高级泥化带中, 矿石矿物组合为蓝辉铜矿+铜蓝+辉钼矿。罗卜岭矿区的原生晕地球化学三维模型显示, 微量元素具有一定的分带特征, 低温元素Au与高温元素组合W、Sn、Bi分布于矿体上方, 中低温元素Pb、Zn、Ag分布于Cu、Mo元素之间; 元素直观垂向分带序列大致为: (As、Sb、Hg)-(W、Bi、Sn)-Ga-Au、Ba-Cu、Ag-Pb、Zn-Mn-Mo; 前缘晕的元素与氧化物组合为As、Sb、Au、Ga、Al2O3, 矿体近矿晕元素组合为Ag、Pb、Zn, 缺失尾晕元素组合; Cu、Mo可直接作为找矿指示元素, Au、Ag、Pb、Zn、As、Sb、Ga、Ba、Mn可作为间接指示元素, 矿床深部K2O正异常与Al2O3负异常可作为斑岩型铜钼矿的重要找矿标志, 这一规律对紫金山矿田深部和外围隐伏斑岩型矿体的勘查工作具有重要的参考意义。 相似文献
9.
对个旧西区陡岩锡矿原生晕的研究,认为金属矿物组合分带有规律,(从内向外)Cu、Sn带→Sn、Pb、Cu带→Sn、Pb带;金属元素水平分带(从内向外):Cu、Bi→Ag→Sn→Pb、Mn→Cd;垂直分带序列(从下至上):Cu→Zn→Sn→Ag→Pb→Mo→In→Bi→As;可将异常划分为:Sn、Cu型,Sn、Cu、Pb型,Sn、Pb型;通过地表、剖面原生晕特征的分析,提出找矿标志;预测花岗岩的深度及成矿有利地段,指出找矿方向。 相似文献
10.
11.
Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
12.
Inter-regional correlation of transgressions and regressions in the Cretaceous period 总被引：1，自引：0，他引：1
T. Matsumoto 《Cretaceous Research》1980,1(4):359-373
Well investigated platforms have been selected in each continent, and the history of Cretaceous transgressions and regressions there is concisely reviewed from the available evidence. The factual records have been summarized into a diagram and the timing of the events correlated between distant as well as adjoining areas.On a global scale, major transgressions were stepwise enlarged in space and time from the Neocomian, via Aptian-Albian, to the Late Cretaceous, and the post-Cretaceous regression was very remarkable. Minor cycles of transgression-regression were not always synchronous between different areas. Some of them were, however, nearly synchronous between the areas facing the same ocean.Tectono-eustasy may have been the main cause of the phenomena of transgression-regression, but certain kinds of other tectonic movements which affected even the so-called stable platforms were also responsible for the phenomena. The combined effects of various causes may have been unusual in the Cretaceous, since it was a period of global tectonic activity. The slowing down of this activity followed by readjustments may have been the cause of the global regression at the end of the Cretaceous. 相似文献
13.
The Afyon stratovolcano exhibits lamprophyric rocks, emplaced as hydrovolcanic products, aphanitic lava flows and dyke intrusions, during the final stages of volcanic activity. Most of the Afyon volcanics belong to the silica-saturated alkaline suite, as potassic trachyandesites and trachytes, while the products of the latest activity are lamproitic lamprophyres (jumillite, orendite, verite, fitztroyite) and alkaline lamprophyres (campto-sannaite, sannaite, hyalo-monchiquite, analcime–monchiquite). Afyon lamprophyres exhibit LILE and Zr enrichments, related to mantle metasomatism. 相似文献
14.
正20140751 Guo Xincheng(Geological Party,BGMRED of Xinjiang,Changji 831100,China);Zheng Yuzhuang Determination and Geological Significance of the Mesoarchean Craton in Western Kunlun Mountains,Xinjiang,China(Geological Review,ISSN0371-5736,CN11-1952/P,59(3),2013,p.401-412,8 相似文献
15.
正20141058 Chen Ling(Key Laboratory of Mathematical Geology of Sichuan Province,Chengdu University of Technology,Chengdu610059,China);Guo Ke Study of Geochemical Ore-Forming Anomaly Identification Based on the Theory of Blind Source Separation(Geosci- 相似文献
16.
正20141334 Chen Kun(Institute of Geophysics,China Earthquake Administration,Beijing100081,China);Yu Yanxiang Shakemap of Peak Ground Acceleration with Bias Correction for the Lushan,Sichuan Earthquake on April20,2013(Seismology and Geology,ISSN0253-4967,CN11-2192/P,35(3),2013,p.627-633,2 illus.,1 table,9 refs.)Key words:great earthquakes,Sichuan Province 相似文献
17.
正20141624 Cai Xiongfei(Key Laboratory of Geobiology and Environmental Geology,Ministry of Education,China University of Geosciences,Wuhan 430074,China);Yang Jie A Restudy of the Upper Sinian Zhengmuguan and Tuerkeng Formations in the Helan Mountains(Journal of Stratigraphy,ISSN0253-4959CN32-1187/P,37(3),2013,p.377-386,5 illus.,2 tables,10 refs.) 相似文献
18.
正20142263Lü Shaojun(Geological Survey of Jiangxi Province,Nanchang 330030,China)Early-Middle Permian Biostratigraphical Characteristics in Qiangduo Area,Tibet(Resources SurveyEnvironment,ISSN1671-4814,CN32-1640/N,34(4),2013,p.221-227,2illus.,2tables,22refs.)Key words:biostratigraphy,Lower Permian,Middle Permian,Tibet 相似文献
19.
正20142560Hu Hongxia(Regional Geological and Mineral Resources Survey of Jilin Province,Changchun 130022,China);Dai Lixia Application of GIS Map Projection Transformation in Geological Work(Jilin Geology,ISSN1001-2427,CN22-1099/P,32(4),2013,p.160-163,4illus.,2refs.) 相似文献
20.
正20140692 Duo Tianhui(No.402 Geological Team,Exploration of Geology and Mineral Resources of Sichuan Authority,Chengdu611730,China);Wang Yongli Computer Simulation of Neptunium Existing Forms in the Groundwater(Computing Techniques for Geophysical and Geochemical Exploration,ISSN1001-1749,CN51-1242/P,35(3), 相似文献