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1.
拿若铜(金)矿床是多龙矿集区内继多不杂斑岩铜(金)矿、波龙斑岩铜(金)矿之后又一取得重大找矿突破的大型斑岩型矿床。作者以矿区探矿工程分析数据为基础,研究各成矿元素空间分布规律。成矿元素在垂向上的分带特征不明显,在平面上分带特征较显著,表现为自矿区中心ZK0001,向南西方向具有Cu+Au-Cu(Au、Ag)→Cu(Ag、Au)-Cu(Ag)的分带特征。同时,矿区土壤地球化学测量显示,从0线开始至31线(北东→南西)具有Mo、Cu→Mo(Cu、Au)→Cu、Au(Ag、Mo、Pb)→Pb→Pb、Zn分带特征,显示物质来源和热源位于0线附近,成矿流体是以0线、7线一带向四周运移,并具有从北东向南西方向运移的特点。通过矿床地质特征、元素分带特征研究,建立了矿区地球化学勘查模型。  相似文献   

2.
广西金山金银矿区成矿构造分析和构造地球化学找矿   总被引:2,自引:1,他引:1  
通过广西金山金银矿区现场地质调查和构造编图,系统总结了矿区构造控矿规律。在此基础上针对主控矿断裂开展地球化学找矿研究。矿区兼有产于主控矿断裂带中的蚀变岩型金矿和侧羽状张裂带中的石英脉型金矿两种类型,不同的构造环境控制不同的矿化类型,可互为找矿标志;矿体受构造界面控制,控矿断裂成矿期不均一张开导致矿化分段富集;成矿期的构造活动表现为主断裂上盘向南西斜滑,相应地矿体向南西侧伏、倾斜延深明显大于延长;矿体中部厚、两侧薄,11号勘探线为矿化富集中心。随热液蚀变的增强,Ag、Au、Cu、Pb和Zn含量逐渐增高。因子分析表明,矿区主成矿元素组合为Ag、Au、Cu、Pb和Zn,可作为找矿的指示元素。元素分布型式、元素组合分析和分形分维统计显示,本区Ag、Au成矿具多阶段性。矿区构造地球化学原生晕分带序列自上而下为Au-Hg-As-Bi-Sn-Sb→W-Co-Cr-Ti-Ni-Ag-V-Mn→Cu-Zn-Pb-Mo,显示该矿床为一浅剥蚀矿床。在综合分析成矿构造、岩浆活动、蚀变特征和构造地球化学原生晕分带资料的基础上,认为矿区深部和外围仍有较好的找矿前景。其中矿区深部找矿重点在11线南西侧。  相似文献   

3.
西藏甲玛铜多金属矿元素分布规律及地质意义   总被引:18,自引:7,他引:11  
甲玛铜多金属矿床已经成为冈底斯成矿带内为数不多的铜品位高、规模大、矿体连续性好的超大型斑岩-矽卡岩-角岩型铜多金属矿床。文章根据167个钻孔的成矿元素化学分析结果,对各元素平面分带、(Pb+Zn)/Cu、Au/Cu、Mo/Cu、Pb/Ag、Zn/Pb、Zn/Cu比值分带以及剖面上元素的分带等进行了系统分析,认为甲玛铜多金属矿具有典型的与岩浆成矿作用有关的元素分带特征,矿体由深部向浅部具有Mo→Mo(Cu)→Cu+Mo→Cu(Pb+Zn+Mo)→Cu(Pb+Zn)→Pb+Zn的成矿元素分带现象,具有高温→中低温成矿演化的特点。研究提出,成矿流体的运移方向是由北东至南西,流体源位于矿区北东部的则古朗地区。这种典型的热液分带特征同海底喷流沉积矿床近管道相Pb/Ag比值高、远离喷口Zn/Pb、Zn/Cu比值高的元素分带特征有着本质的区别。矿区北部则古朗地区高Mo/Cu比值以及钼元素矿化强度随标高降低愈强的分布特点,均预示了该地区是深部隐伏含矿斑岩体之所在。  相似文献   

4.
西藏尕尔穷铜金矿元素空间分布规律及地球化学勘查模型   总被引:2,自引:0,他引:2  
尕尔穷铜金矿床是班公湖-怒江成矿带西段唯一达到详查级别的矿床,其金资源量已达大型规模.根据30个钻孔的成矿元素化学分析结果,对各成矿元素平面分布特征进行了系统分析发现,尕尔穷矿床具有较明显的与岩浆热液成矿作用有关的元素分带特征,矿体从南东→北西向、深部→浅部具有Mo→Cu(Au)→Cu+Au+Ag→Au+Cu+Ag→A...  相似文献   

5.
甘炳艳 《江苏地质》2021,45(4):411-419
广东紫金风门坳矿区富集Sn、W、Pb、Zn、Cu、Mo、Au、Ag、As等元素,但分布不均匀,具有叠加富集特征。通过在风门坳矿区开展1∶10 000土壤地球化学测量工作,圈定了2处矿致综合异常,结合各矿床(点)成矿特征,认为风门坳矿区成矿元素自北西向南东依次为Sn、W、Pb、Zn、Cu、Mo→Sn、Cu、Au→Pb、Ag、Zn,呈规律性水平分带。结合矿区3号勘探线矿化(体)特征,认为矿床成矿元素在垂直方向自上而下分带为Sn、W、Pb、Zn→Cu、Zn、Ag→Sn、Zn。上述规律可为今后在该区继续开展扩大扩深找矿工作提供有利线索。  相似文献   

6.
冯亮  李冰 《江苏地质》2022,46(4):398-404
广东紫金风门坳矿区富集Sn、W、Pb、Zn、Cu、Mo、Au、Ag、As等元素,但分布不均匀,具有叠加富集特征。通过在风门坳矿区开展1∶10 000土壤地球化学测量工作,圈定了2处矿致综合异常,结合各矿床(点)成矿特征,认为风门坳矿区成矿元素自北西向南东依次为Sn、W、Pb、Zn、Cu、Mo→Sn、Cu、Au→Pb、Ag、Zn,呈规律性水平分带。结合矿区3号勘探线矿化(体)特征,认为矿床成矿元素在垂直方向自上而下分带为Sn、W、Pb、Zn→Cu、Zn、Ag→Sn、Zn。上述规律可为今后在该区继续开展扩大扩深找矿工作提供有利线索。  相似文献   

7.
鸡笼山夕卡岩金(铜)矿床分带及流体演化   总被引:1,自引:0,他引:1  
张轶男  赵一鸣  毕承思 《矿床地质》1998,17(Z2):365-368
鸡笼山金铜矿床产于燕山期钙碱性花岗闪长斑岩与下三叠统大冶组灰岩接触带。夕卡岩分带从内向外依次为花岗闪长斑岩→蚀变花岗闪长斑岩→透辉石-石榴石夕卡岩→石榴石夕卡岩→硅灰石或石榴石-硅灰石夕卡岩一大理岩。矿化分带序列为Cu(M。)→Cu(Au)→Au(Cu)→Au-Pb-Zn。与早期夕卡岩阶段有关的流体包麦体表现为高温高盐度。温度范围400~680℃ ,平均456℃ 。大约有18%所测石榴石中的流体包裹体含石盐子晶,盐度为20.6%~51%NaCl,平均43.2%NaCl。石英、方解石中的包裹体代表成矿期的流体,温度范围126~386℃ ,平均286℃,盐度为8.7%~21.2%,平均15%。成矿深度为2 km,静水压力20 MPa。  相似文献   

8.
山东招远市前孙家金矿构造控矿规律和构造地球化学找矿   总被引:2,自引:0,他引:2  
通过对前孙家金矿矿区构造控矿规律研究可知,本区控矿构造型式为成矿前北东向压扭性断裂构造系统中构造透镜体四周的环边式"X"型断裂,控矿构造具有北北东向、近南北向的优选性,成矿期的构造应力场表现为左旋斜滑运动,主断裂带上的南西向侧伏构造控制了矿体延深。矿区成矿元素组合为Au、Ag、As、Co、Mo、Sn。构造地球化学高值带具有与矿体侧伏方向的一致性。根据控矿构造型式、矿体产出规律、成矿期构造应力场分析和数值模拟以及Au构造地球化学异常和成矿因子得分等值线图等方面成果综合分析,提出矿区下一步找矿有利地段有三处:4号脉的南西深部、2号脉的南西深部和新1号脉西侧。  相似文献   

9.
云南富乐厂铅锌矿床是滇东北矿集区东南部的典型矿床之一。在矿区进行大比例尺构造填图的基础上,运用构造成矿动力学的理论和方法,筛选典型断裂构造进行力学性质的鉴定,对不同期次、不同方向的断裂特征进行了系统阐述,初步划分了构造期次,总结了构造体系。认为该区断裂经历了晋宁期-澄江期近东西向的挤压作用,印支期-燕山早期北西-南东向挤压作用及后期燕山中晚期-喜马拉雅期的北东-南西向挤压作用的过程。晋宁-澄江期构造作用为该区成矿提供了有利的地质背景,印支期-燕山早期为该矿成矿主期,北东向压扭性断裂和北西向的扭张性断裂使得流体充填、富集成矿;后期近东西向的扭性断裂为破矿构造。通过矿区构造与成矿关系的研究,为隐伏矿预测与深部勘查提供了依据。  相似文献   

10.
达达肯乌拉山铅锌矿床位于柴北缘成矿带南部,是近年来在泥盆系牦牛山组陆相火山岩中新发现的矿床。笔者对矿区00勘探线上3个钻孔岩心样数据,运用格里戈良原生晕分带指数法和构造叠加晕找盲矿法研究了原生晕特征。研究表明,Mo、Cu是铅锌矿体前晕,Sb是近矿晕,Au、As、Ag是矿尾晕;垂向分带序列由下向上为Ag→As→Au→Pb→Zn→Sb→Cu→Mo,序列具反向分带特征,铅锌成矿成晕是多次叠加的结果;矿(化)体轴向深部有前、尾晕叠加共存的重要信息,推测存在隐伏矿体。综上建立了该矿床深部找矿预测的成矿成晕模型。  相似文献   

11.
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.
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.
SEISMIC GEOLOGY     
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.
PALEONTOLOGY     
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.
GEOCHEMISTRY     
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   

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