共查询到20条相似文献，搜索用时 422 毫秒
1.
中国东部中生代火山岩型金银矿床成矿地质特征 总被引：1，自引：0，他引：1
论述了中国东部中生代火山岩型金银矿床的成矿地质背景及控矿条件,包括基底地层、火山建造、次火山岩及构造与矿化的关系.将该类型矿床分为3个成因类型,并综合论述了几类矿床的赋矿围岩、容矿构造、矿体形态、矿石建造、矿化分带及蚀变等主要地质特征. 相似文献
2.
西湾铅锌矿床位于长江中下游成矿带中段庐枞矿集区北部、NE与近EW向基底断裂交会处，成矿条件优越。通过对矿区地质、矿化蚀变、矿体特征及矿石特征等进行分析，认为西湾铅锌矿的主要赋矿围岩为中三叠统周冲村组灰岩角砾岩，控矿构造为基底褶皱隆起带、基底断裂及其次级断裂，构造破碎带和“硅钙面”对铅锌矿体的控制明显。NE向断裂为导矿构造，其次级断裂及其形成的破碎带和“硅钙面”为容矿构造。根据赋矿围岩、控矿构造及铅锌矿赋存特征，认为西湾铅锌矿床的控矿因素为地层和构造，该矿床为受地层岩性和构造控制的热液充填型铅锌矿床。 相似文献
3.
4.
5.
通过对天等把荷锰矿地质构造、赋矿层位、矿体特征、矿石特征等论述,认为把荷锰矿属于沉积―氧化型矿床,除了正常海相沉积,矿区的地层、岩性、沉积―构造环境、气候和地貌等条件均对成矿有一定的影响,分析此类锰矿床的地质特征以及成因,对寻找类似锰矿床具有一定的指导意义。 相似文献
6.
通过对赫章县白腊厂观音山铅锌矿床地层、构造及矿体特征的分析,从构造、含矿岩性、物源等方面对该矿床进行了控矿条件进行研究。矿床主要受北西向和北北东向两组构造控制,该构造既为含矿热液的导矿构造,也为该区铅锌矿体的容矿构造。矿体主要产于碳酸盐岩地层中,层控特征明显。成矿物质可能主要来源于地层,但有深部地壳或地幔硫的混合。综合研究表明,该矿床属于层控矿床,北西向和北北东向两组构造以及旁侧小褶皱分布区域可能为成矿远景区。 相似文献
7.
赞坎特大型铁矿位于新疆西昆仑北段的塔什库尔干磁铁矿矿集区内,该矿集区已发现老并、赞坎、叶里克等多个大型、超大型铁矿床,矿床类型相似,但研究程度整体较低。为了在该区寻找同类型铁矿床,有必要对该类型矿床进行深入研究。通过对矿体形态特征、矿石结构构造、矿物组合分析、围岩及矿石的地球化学特征等的详细分析,认为该矿区的磁铁矿体矿体的形态、产状受地层控制较为明显,矿床成因类型为海相火山沉积型。 相似文献
8.
9.
荣华锰矿赋存于桂西三叠系百逢组中,为该层位首次发现的中型规模锰矿。笔者通过参与矿区锰矿勘查工作,采用室内外观测、测试、工程揭露和验证等手段,对研究区地层、构造、沉积演化、含矿层位、矿体及矿石矿物特征、矿床成因和找矿标志等方面进行了分析探讨。研究发现荣华锰矿为典型的沉积-锰帽型矿床,严格受地层和构造因素控制;矿石类型主要为氧化锰矿贫锰矿石;氧化锰矿物主要为水羟锰矿、硬锰矿及软锰矿;矿床成因与原始沉积作用、后期风化淋滤等有重要关系;百逢组浊积岩之下、罗楼组碳酸盐岩之上的狭窄范围是荣华锰矿的典型找矿标志,该标志对大量出露三叠系百逢组的桂西地区具有普遍意义,同时指出桂西地区该组地层内具有良好的找矿前景。 相似文献
10.
试论花垣民乐锰矿床的成因 总被引：2，自引：0，他引：2
民乐锰矿床是中国震旦纪最大的碳酸锰矿床。矿床位于下震旦统湘锰组下段黑色炭质页岩底部,与湘潭锰矿属同一层位。矿体呈透镜状和似层状。矿石不仅富含菱锰矿,而且富含有机碳和藻类化石。基于矿床地质特征和控矿因素等大量资料的综合分析,提出该矿床的物质是古陆和地壳深部以及火山等多来源的,锰质呈MnCO_3或/和MnO_2形式沉积。菱锰矿的生成与藻类的活动密切相关。因此,该矿床属于化学及生物化学沉积成因矿床。 相似文献
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.
Emmanuel Skourtsos Daniel Vachard Alexandra Zambetakis-Lekkas Rossana Martini Louisette Zaninetti 《Comptes Rendus Geoscience》2002,334(12):925-931
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.
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.
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