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1.
四川松潘东北寨金矿黄铁矿标型特征研究 总被引：11，自引：0，他引：11
对东北寨金矿中黄铁矿形态、成分、晶胞参数、物理性质及红外谱学特征５个方面进行了详细研究，分析了黄铁矿的成因和找矿标型特征，认为东北寨金矿床属于浅成低温渗滤热卤水热液成因金矿，指出本区的黄铁矿标型特征是找寻东北寨式金矿的重要找矿标志。 相似文献
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矿区石英成分、晶胞参数、热发光、包裹体、红外谱等的研究揭示，石英的杂质含量、１２０℃±和２５０℃±发光峰强、爆裂脉冲数高、多峰等特征，是南天门金矿区的富矿标志，其深部具找矿远景。 相似文献
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本文研究了新疆北山地区金矿床（点）石英的稀土元素、包裹体特征及测温、微量元素、红外吸收光谱、晶胞参数等方面的矿物学特征，总结出有参考价值的成因信息和找矿标志。认为北山金矿床主要系浅成中低温热液成因。有一定铝碱质量分数（０．０３２％～０．２７７％）、晶胞参数Ｖ＞０．１１３１８ｎｍ３、红外光谱向低频方向移动等特征是北山金矿床的重要找矿矿物学标志。 相似文献
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论述了二道沟金矿床不同矿脉黄铁矿形态、成分、热电性及石英成分、晶胞参数、热发光等方面的找矿标型特征．并且可作为评价地质体含矿性。判断矿体剥蚀程度以及预测金矿床深部找矿远景的指示标志．为寻找和评价二遭沟式金矿提供找矿矿物学依据。 相似文献
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对吉林集安金厂沟金矿石英的含Au性测试分析结果显示 ,含Au与不含Au石英脉的包裹体成分及晶胞大小有明显的差异 ,其中含Au石英脉包裹体的H2 O和CO2 含量分别为 85 8 35×10 - 6 及 119 87× 10 - 6 ,而不含Au石英脉包裹体的H2 O和CO2 含量分别为 668 2 2× 10 - 6 及 69 2 4×10 - 6 ,红外光谱测试石英的晶胞参数及微量元素的分布也显示出同样的差异。这种差异为该矿区深部找矿预测提供了有参考价值的成矿信息及找矿标志 ,结合构造控矿规律、地球化学研究信息得出该矿床的 4、 11、 13号石英脉含矿性较好 相似文献
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湘西金矿及外围的层间脉石英热发光光谱线(TL)的研究表明,富金石英的TL谱图多为单峰,而贫金或不含金石英的为双峰;含金石英的主峰位的温度Tmax为264～342℃,而含金性差的石英Tmax为254～263℃;石英主峰位热发光强度(I)和总强度(I_总)与含金量呈正相关,随着含金量增加而增大;含金石英热发光的陷阱深度E值较大,为1.9459×10~(-20)～1.9885×10~(20)J,贫金或不含金石英的E值为1.2128×10~(-20)～1.5211×10~(-20)J。含金石英捕获中心频率S_0值较大,为3.9874～4.2113S~(-1),而贫金或不含金石英的S_0值较小,为0.3915～1.8093S~(-1)。据此,对比金矿区及外围工作区石英的热发光光谱特性,指导评价矿区外围区段,提出了唐家溪、徐家院为具找金远景的区段。 相似文献
8.
大庆岭金矿床石英的矿物学特征及其成因找矿意义 总被引：1，自引：0，他引：1
通过大庆岭金矿床中石英的成分、结构、热发光、爆裂测温分析,石英红外光谱特征的研究,认为石英中 Cu、Pb、Zn杂质含量高,晶胞参数大,热发光积分强度大,爆裂累计脉冲数高和红外吸收峰波数低时,标志着为富金的石英特征. 相似文献
9.
研究表明,在砷、汞、锑、金矿床中普遍含有较高的铊,并发现富铊雄黄矿和铊单矿物。铊亲硫和亲石地球化学性质决定铊赋存形式。在岩矿石中铊主要呈单矿物,分散状态铊占次要地位。根据富铊雄黄矿床成矿特点,铊赋存状态,岩矿石中铊含量及其与砷、汞、锑、金相关关系,尝试性提出成矿模式和找矿标志。岩矿石中铊含量>10×10~(-6),5×10~(-6)—10×10~(-6),1×10~(-6)—5×10~(-6),分别为矿床、矿田和矿带的找矿标志。 相似文献
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通过区内505和530等主要矿脉石英红外吸收光谱、热爆裂及热发咣特征的系统研究，总结了该区无矿、贫矿及矿体石英脉评价的石英矿物学标志，表现为：①无矿石英起爆温度为210－330℃，热爆裂曲线无明显峰型；石英热发光总强度大于20000cps，峰值强度大于500cps;②贫金石英脉其石英红外吸收相对光密度DCO2／DH2O值大于1．1；起爆温度为210－280℃，石英热爆裂曲线为明显单峰形态，主爆峰对应温度值为420－440℃；石英热发光总强度介于10000－20000cps之间，峰值强度介于150－300cps之间；③矿体石英脉其石英红外吸收相对光密度DCO2／DH2O值小于1．0；起爆温度100－160℃，热爆曲线为单峰型，主爆峰对应温度为140－180℃；石英热发光总强度值小于10000cps，峰值强度小于150cps。根据本区含金矿脉矿化分带模式及石英红外吸收光谱、热及热发光参数系统变化规律，建立了该区石英脉型金矿床找矿评价的石英矿物学标志模型。 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
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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
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Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozac&#x;h Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003). 相似文献
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正20141520 Bo Ying(Key Laboratory of Metallogeny and Mineral Assessment,MLR,Beijing 100037,China);Liu Chenglin Saline Spring Hydrochemical Characteristics and Indicators for Potassium Exploration in Southwestern and Northern Tarim Basin,Xinjiang(Acta Geoscientica Sinica,ISSN1006-3021,CN11-3474/P,34(5),2013,p.594-602,5 illus.,3 tables,28 refs.) 相似文献
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正20141243Chen Ge(Hangzhou Research Institute of Petroleum Geology,PetroChina,Hangzhou 310023,China);Si Chunsong Study on Sedimentary Numerical Simulation Method of Fan Delta Sand Body(Journal of Geology, 相似文献
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正20142599Chen Sanming(Guangxi Key Laboratory of Concealed Deposits Exploration,Guilin University of Technology,Guilin541004,China);He Yuzhou Block Model and Reserves Estimation of Panzhihua Iron Deposit Based on 3D Geological Modeling(Journal of Guilin University of Technology,ISSN1674-9057,CN45-1375/N,33(4),2013,p.610-615,9illus.,1table,15refs.) 相似文献
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正20140594 Bai Daoyuan(Hunan Institute of Geology Survey,Changsha 410016,China);Zhong Xiang Faults in the Jingzhou Basin and Their Tectonic Settings(Geotectonica et Metallogenia,ISSN1001-1552,CN44-1595/P,37(2),2013,p.173-183,6illus.,59refs.)Key words:basin evolution,tectonic setting,South China In the Upper Paleozoic and Jurassic se- 相似文献
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正20141912Cao Hui(State Key Laboratory for Continental Tectonics and Dynamics,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China)Gravitational Collapse and Folding during Orogenesis:A Comparative Study of FIA Trends and Fold Axial Plane Traces(Geology in China,ISSN1000-3657,CN11-1167/P,40(6),2013,p.1818-1828,9illus.,35refs.,with 相似文献