首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 515 毫秒
1.
胶东邓格庄金矿深部地球化学及预测   总被引:6,自引:4,他引:6       下载免费PDF全文
通过对胶东邓格庄金矿深部(-225m~-345m)进行地球化学原生晕研究,结果表明Ⅰ2号脉的原生晕具有正向分带的特征,Ⅱ号脉的原生晕呈反向分带。据此推测在-345m以下地段Ⅰ2号矿体延伸不大,而Ⅱ号脉在-345m以下地段还有盲矿体的叠加。  相似文献   

2.
刘屯金矿床由刘屯(Ⅰ)和金屯(Ⅱ)两个地段组成.作者通过矿床地质特征、深部地球物理特征、金矿体地球化学异常模式判别及矿体剥蚀程度预测等研究,对刘屯金矿床深部成矿提出了新看法,认为Ⅰ地段矿体已剥蚀到中下部,40 m以下矿化尖灭;Ⅱ地段矿体剥蚀至头部,向下有较大延深,可进一步开展深部找矿.  相似文献   

3.
李国宽 《铀矿地质》2000,16(1):37-41
刘屯金矿床由刘屯(Ⅰ)和金屯(Ⅱ)两个地段组成。作者通过矿床地质特征、深部地物理特征、金矿体地球化学异常模式判别及矿体剥蚀程度预测等研究,对刘屯金矿床深部成矿提出了新看法,认为Ⅰ地段矿体已剥蚀到中下部,40m以下矿化灭灭;Ⅱ地段矿体剥蚀至头部,向下有较大延深,可进一步开展深部找矿。  相似文献   

4.
测汞在金矿床深部含矿性评价中的应用   总被引:3,自引:0,他引:3  
首先介绍了汞化合物的地球化学特征及热释汞测试方法,并以冀西北水晶屯金矿为例,对矿床主要工业矿体的赋存地段(Ⅱ号矿脉),进行了深部含矿性评价。结果表明,不同的汞化合物在评价金矿床深部含矿性中具有很好的指示作用,其评价效果同微量元素评价效果相比有良好一致笥。  相似文献   

5.
云南毛坪铅锌矿床是滇东北铅锌成矿带中重要的矿床之一,以毛坪铅锌矿床Ⅰ号矿体为例,在深入研究矿床地质特征的基础上,将其赋存地层——宰格组中第二段(D3zg^2)NE向断裂构造岩的稀土元素配分模式划分为四类,讨论了其稀土元素地球化学特征,提出了稀土元素地球化学找矿标志,为隐伏矿预测提供了重要的地球化学信息。  相似文献   

6.
对二连盆地2081铀矿床进行系统采样和分析,以探讨古气候转换对砂岩型铀矿成矿过程的重要意义。利用X射线衍射、扫描电子显微镜等手段分析了赛汉组沉积矿物中矿物含量及其他记录古气候变化的地球化学参数随深度的变化。结果表明,2081铀矿床成矿期古气候演化可划分为5个主要阶段,先后经历了温暖潮湿(Ⅰ)—干冷(Ⅱ)—温暖半湿润(Ⅲ、Ⅳ)—干热(Ⅴ)的演化系列,相应地出现了3个重要的气候转换时期。2081铀矿床的2个重要成矿期与其中2次重要的气候转换期在时间、空间上高度吻合,其中二号矿体的成矿期与Ⅱ—Ⅲ、Ⅳ气候转变期一致,一号主矿体的成矿期与Ⅲ、Ⅳ—Ⅴ气候转变期一致,这些特征表明区域性的气候转换期是形成砂岩型铀矿的重要条件。  相似文献   

7.
袁义生  张权莉  刘应忠  罗明学 《贵州地质》2007,24(4):287-290,297
盘县红岩洞金矿是应用地球化学勘查方法发现的金矿体,回顾发现该矿体的过程,研究地球化学特征,讨论应用地球化学勘查方法寻找微细浸染型金矿的工作方法及经验。  相似文献   

8.
在阐述星火林场地区银矿点地质特征的基础上,讨论矿点成因,总结找矿标志.矿点位于晚二叠世花岗闪长岩中,目前已发现三条银矿体,Ⅰ号、Ⅱ号矿体受北西向断裂构造带控制;Ⅲ号矿体位于北东向断裂带内.矿石类型为硅化蚀变岩型,矿点成因类型为岩浆热液型.硅化、钾长石化、绢云母化及黄铁矿化是矿化蚀变标志,闪长玢岩是脉岩找矿标志,Ag元素异常及Ag-Pb-Zn组合异常是地球化学找矿标志.  相似文献   

9.
瑶沟金矿床地球化学特征研究表明,主成矿因子为中偏高温元素组合,成矿与岩浆热动力活动有关,矿床元素垂直分带显示深部可能有盲矿体存在,水平分带表明成矿元素在热液中的运移方向为由西向东,矿体剥蚀程度为中-下部,其地球化学原生晕剥蚀程度为中-上部。据上述特征建立了矿床地球化学预测模型 。  相似文献   

10.
雄村矿集区是近年来西藏冈底斯成矿带内发现的一处超大型铜金矿集区, 该矿集区位于冈底斯造山带中段南缘, 其南侧紧邻日喀则弧前盆地.最新的勘探资料表明, 雄村矿集区由Ⅰ、Ⅱ、Ⅲ号斑岩型铜金矿体组成.本文以雄村Ⅰ号矿体为研究对象, 获得Ⅰ号矿体中4件辉钼矿样品的Re-Os模式年龄范围非常一致, 其变化范围为160.1±2.3~163.4±2.3 Ma, 等时线年龄为161±11 Ma(MSWD=4.2), 误差较大, 而平均模式年龄161.5±2.7 Ma(MSWD=2.0), 误差较小.因此, 雄村Ⅰ号矿体的形成时代为160.1±2.3~163.4±2.3 Ma, 最有可能的形成年龄应为161.5±2.7 Ma, 该年龄代表了雄村Ⅰ号矿体的成矿年龄, 这与前人获得的含矿斑岩(含眼球状石英斑晶的角闪石英闪长玢岩)的锆石U-Pb年龄(164.3±1.9 Ma)基本吻合, 表明矿床形成于中侏罗世.同时, 雄村Ⅰ号矿体的含矿斑岩体和赋矿火山岩具有与岛弧火成岩类似的地球化学特征, 如相对富集LREE、LILE, 亏损HREE、HFS, 缺少或微弱负Eu异常.综合来看, 雄村Ⅰ号矿体形成于新特提斯洋俯冲期(>65 Ma), 产出的构造背景为新特提斯洋向北俯冲形成的岛弧环境, 属岛弧型斑岩铜金矿床.   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.
Some olistolites reworked in a Tertiary flysch of Mount Parnon (Peloponnesus, Greece) exhibit a Late Permian assemblage, dominated by Paradunbarula (Shindella) shindensis, Hemigordiopsis cf. luquensis and Colaniella aff. minima. This association corresponds to the Late Wuchiapingian (=Late Dzhulfian), a substage whose algae and foraminifera are generally little known. Contemporaneous limestones crop out in the middle part of the Episkopi Formation in Hydra, but they are rather commonly reworked in Mesozoic and Cainozoic sequences. The palaeobiogeographical affinities shared by the foraminiferal markers of Greece, southeastern Pamir, and southern China, are very strong (up to the specific level), and are congruent with the Pangea B reconstructions. To cite this article: E. Skourtsos et al., C. R. Geoscience 334 (2002) 925–931.  相似文献   

13.
PALEONTOLOGY     
正20141596 Liu Yunhuan(School of Earth Sciences and Resources,Chang’an University,Xi’an 710054,China);Shao Tiequan Early Cambrian Quadrapyrgites Fossils of Xixiang Boita in Southern Shaanxi Province(Journal of Earth Sciences and Environment,ISSN1672-6561,CN61-1423/P,35(3),2013,p.39-43,3 illus.,20 refs.)  相似文献   

14.
正20141719 Chen Zhijun(State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China);Chen Jianguo Automated Batch Mapping Solution for Serial Maps:A Case Study of Exploration Geochemistry Maps(Journal of Geology,ISSN1674-3636,CN32-1796/P,37(3),2013,p.456-464,2 illus.,2 tables,10 refs.)  相似文献   

15.
正20140962 Chen Fenning(Xi’an Institute of Geology and Mineral Resources,Xi’an710054,China);Chen Ruiming Late Miocene-Early Pleistocene Ostracoda Fauna of Gyirong Basin,Southern Tibet(Acta Geologica Sinica,ISSN0001-5717,CN11-1951/P,87(6),2013,p.872-886,6illus.,56refs.)  相似文献   

16.
PETROLOGY     
正1.IGNEOUS PETROLOGY20142008Cai Jinhui(Wuhan Center,China Geological Survey,Wuhan 430205,China);Liu Wei Zircon U-Pb Geochronology and Mineralization Significance of Granodiorites from Fuzichong Pb-Zn Deposit,Guangxi,South China(Geology and Mineral Resources of South China,ISSN1007-3701,CN42-1417/P,29(4),2013,p.271-281,7illus.,  相似文献   

17.
正20141205Cheng Weiming(State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China);Xia Yao Regional Hazard Assessment of Disaster Environment for Debris Flows:Taking Jundu Mountain,Beijing as an  相似文献   

18.
正20141266Fan Chaoyan(Guangdong Provincial Key Laboratory of Mineral Resources and Geological Processes,Guangzhou 510275,China);Wang Zhenghai On Error Analysis and Correction Method of Measured Strata Section with Wire Projection Method(Journal of  相似文献   

19.
正20140582 Fang Xisheng(Key Lab.of Marine Sedimentology and Environmental Geology,First Institute of Oceanography,State Oceanic Administration,Qingdao 266061,China);Shi Xuefa Mineralogy of Surface Sediment in the Eastern Area off the Ryukyu Islands and Its Geological Significance(Marine Geology Quaternary Geology,ISSN0256-1492,CN37  相似文献   

20.
正20141810 Bian Yumei(Geological Environmental Monitoring Center of Liaoning Province,Shenyang 110032,China);Zhang Jing Zoning Haicheng,Liaoning Province,by GeoHazard Risk and Geo-Hazard Assessment(Journal of Geological Hazards and Environment Preservation,ISSN1006-4362,CN51-1467/P,24(3),2013,p.5-9,2 illus.,tables,refs.)  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号