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1.
新疆阿舍勒铜矿GIS预测时的找矿有利度和空间相关性分析 总被引：2，自引：0，他引：2
以新疆阿舍勒地区铜矿GIS预测为实例,说明线型异常和面型异常的找矿有利度分析方法,并给出断裂、有利地层和物化探异常找矿有利度分析的结果.给出计算空间相关性的公式,并研究了不同元素化探异常的空间相关性.最后,研究了不同元素的组合异常,论证了在矿产预测中应用组合异常的必要性并利用GIS进行了找矿有利地段的圈定. 相似文献
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新疆阿合勒铜矿GIS预测时的找矿有利度和空间相关性分析 总被引：1，自引：0，他引：1
以新疆阿舍勒地区铜矿GIS预测为实例，说明线型异常和面型异常的找矿有利度分析方法，并给出断裂、有利地层和物化探异常找矿有利度分析的结果。给出计算空间相关性的公式，并研究了不同元素化探异常的空间相关性。最后，研究了不同元素的组合异常，论证了在矿产预测中应用组合异常的必要性并利用GIS进行了找矿有利地段的圈定。 相似文献
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云南元江地区铜矿GIS预测时的找矿有利度和空间相关… 总被引：5，自引：3，他引：2
以云南元江地区铜矿ＧＩＳ预测为例,介绍了线型异常和面型异常的找矿有利度分析方法,并给出了断裂,物化探异常和地层找矿有利度分析的结果,给了了计算空间相关性的公式,产研究了不同元素化探异常的空间相关性,研究了相关元素的组合异常,论证了在矿产资源预测中应用组合异常的必要性。 相似文献
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GIS,经验找矿与求异找矿结合的工具——化探异常找矿效果经验分析 总被引：11，自引：4，他引：7
经验找矿与求异找矿是进入下一世纪的两种重要找矿方法。从经验找矿角度出发,应用ＧＩＳ研究了化探异常与相关矿床的耦合度和出现率,不同元素异常和同一元素不同等级找矿有利度以及两种不同元素组合异常的找矿有利度,研究结果表明,上述两种方法的结合可以极在夺提高预测找矿效果。 相似文献
6.
应用GIS圈定找矿可行地段和有利地段 总被引：37，自引：0，他引：37
以滇中大红山群铜矿床找矿预测为例,探讨了应用地理信息系统（ＧＩＳ）查明地质异常,圈定“５Ｐ”地段的方法．在各类异常找矿有利度分析的基础上,找矿可行地段和有利地段的圈定按如下步骤进行：建立成矿预测空间模型;圈定找矿可行地段;确定用于预测找矿有利地段的异常组合及数值区间,并决定其权重;所选定的各异常叠合,形成叠合图;确定各级别找矿有利地段的归并标准,归并后圈出找矿有利地段．最后,具体地讨论了大红山群铜矿床的预测结果． 相似文献
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东天山土屋--延东斑岩铜矿带矿产资源GIS预测 总被引：4，自引：0，他引：4
以东天山土屋-延东斑岩铜矿床找矿预测为例,应用地理信息系统(GIS),查明该区地质、找矿地球化学异常标志.在各类异常找矿有利度分析的基础上,确定了用于预测找矿有利地段的异常组合及数值区间,并决定其权重.最后,圈定出找矿可行地段、找矿有利地段及潜在资源地段,并讨论了东天山土屋-延东斑岩铜矿床的预测结果. 相似文献
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地质建造组合熵异常与找矿有利地段圈定 总被引：2，自引：0，他引：2
信息熵是研究地质体结构特征的有效工具。在研究云南元江地区昆阳群地质建造信息熵分布的基础上 ,划分出该区的地质建造组合熵异常 ,并定量评价不同熵值分布区的找矿有利度。结合该区的断裂构造异常区、化探异常区 ,圈定出不同级别的找矿有利地段。在研究的全过程中 ,从网格单元的取值、组合熵等值线的绘制、不同熵值区间的找矿有利度定量评价 ,直到找矿有利地段的圈定 ,都是用 MAPGIS软件完成的。用地质建造组合熵异常圈定的找矿有利地段具有更高的综合性 ,可预测与地质建造有关的未知矿床类型。 相似文献
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利用北衙整装勘查区1∶20万水系沉积物地球化学数据,综合分析了地层、岩浆岩、典型矿床主要成矿元素Ag、Au、Cu、Pb、Zn的富集规律,对元素分布特征、综合异常特征、相关性及异常元素组合特征进行初步研究,确定了找矿有利指标组合;通过对比北衙金矿区典型矿床成矿地质、地球化学特征,结合地层、岩浆岩等找矿标志预测北衙地区的找矿远景区。结果表明:综合区域上的地层、构造、岩浆岩和区域矿产等资料,对成矿元素异常组合进行地球化学分区是可行的,能有效反映致矿异常,突出矿化信息;根据区域单元素Au、Ag、Pb、Zn、Cu地球化学特征以及组合元素异常特征结合成矿地质背景,指出了炭窑金矿、铅锌矿找矿靶区;马鞍山北部金矿找矿靶区,为北衙整装勘查区外围找矿提供了指导作用。 相似文献
11.
Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco. 相似文献
12.
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
13.
The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引：4，自引：0，他引：4
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species. 相似文献
14.
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
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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
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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
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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
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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
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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
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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