遥感地质在川西北平武-青川地区金矿研究中的应用

本文运用遥感地质综合研究方法,解译分析了区域构造组合特征及与金矿成矿的关系,探讨了TM蚀变带信息提取试验方法,提出了遥感影像找矿模式和川西北金矿的找矿前景。     

福建永泰地区遥感影像特征研究

在综合分析福建永泰地区遥感影像特征的基础上,根据遥感图像反映出的地质信息特征,有效地解译火山—侵入杂岩区火山地层、侵入岩体、火山构造及线性、环形构造等地质内容。对提高整个地质工作的研究程度具有实际意义。     

东秦岭（河南段）钼矿床地质特征、矿床分布规律及成矿区带划分

东秦岭（河南段）钼矿床类型可分为斑岩型、斑岩-矽卡岩型、斑岩-角砾岩型,以斑岩型钼矿床为主,近几年又相继发现石英脉型及剪切带型钼矿。通过对东秦岭（河南段）钼异常、矿床空间分布特征及成矿区带综合研究,并对东秦岭（河南段）钼成矿区带进行了划分,为该区进一步开展钼矿地质勘查工作具有重要意义。     

西天山地区遥感地质构造及找矿预测

应用遥感地质技术手段,对西天山地区约80000km~2范围,进行地质矿产调查和评价,研究了区内主要断裂构造;圈出具有成矿意义的环形构造群(带)及具独特找矿意义的透镜状影像构造,确定了西天山的地质构造格局。总结了区内矿产分布与地质影像构造的关系。初步建立了该区的遥感找矿准则,并提出了有找矿前景的遥感影像构造地带。     

金厂峪地区环形构造研究及其地质意义

通过对遥感图像的解译研究，金厂峪地区发育有一系列的环形影像特征。在重，磁资料上也有明显的环形异常。它们的成因有三类；太古宙变质上壳岩中环形构造；古褶曲构造；岩浆侵位形成的环形构造。通过对它们的影像特征和地质特征的研究，总结出本区太古宙基底岩系发育有近东西向的古褶曲构造，它控制了后期的岩浆侵位和盖层沉积．而岩浆侵位与本区金矿床的分布有密切关系，因为本区形构造的研究有着重要的地质意义。     

秦岭地区铅锌铜矿产区域分布与影像构造关系

本文从遥感地质角度,讨论了秦岭铅锌铜等多金属矿产的区域分布与影像构造的关系,秦岭区域的“三带三环”的影像构造格局中,北东东、北东和北西向线性构造与次级环形影像构造密集交汇地段,通常是反映区内主要的铅锌铜矿产的分布地段,而且不同矿种类型与不同的影像构造单之有关。这种特点,对于分析区域成矿远景,是值得注视的     

金厂峪地区环形构造研究及其地质意义

通过对遥感图像的解译研究,金厂峪地区发育有一系列的环形影像特征。在重、磁资料上也有明显的环形异常。它们的成因有三类:太古宙变质上壳岩中的环形构造;古褶曲构造;岩浆侵位形成的环形构造。通过对它们的影像特征和地质特征的研究,总结出本区太古宙基底岩系发育有近东西向的古褶曲构造,它控制了后期的岩浆侵位和盖层沉积。而岩浆侵位与本区金矿床的分布有密切关系,因此本区环形构造的研究有着重要的地质意义。     

西藏冈底斯东段遥感构造解译及成矿靶区圈定

[摘 要]通过利用Landsat ETM+遥感影像数据对西藏冈底斯东段进行线性构造和环形构造解译,研究线性构造和环形构造在遥感影像中的特征,选择合适的波段组合,并采用去相关拉伸、边缘检测等方法增强图像线性特征,提取构造信息。结合研究区已知地质资料和已知矿点资料,对线性构造和环形构造的分布规律进行分析和评价。结果表明东西向线性构造是研究区的最主要构造,与北西向、北东向线性构造交汇区并与环形构造交叠区是有利的成矿区域,与已知矿点相吻合,并且还圈定出若干个找矿远景区。     

安徽北淮阳地区构造岩相带的划分与对比

安徽北淮阳变质褶皱带是河南秦岭－桐柏构造岩相带的东延部分，由于受诸多地质因素影响和控制，河南境内一些完整的岩相带向东至我省境内则残缺不全甚至消失。但根据近几年区内地质工作成果，北淮阳变质褶皱带自北而南划分为：１．前陆盆地－杨山群；２．前陆反向冲断带－梅山构造岩片（块）堆叠带；３．盖层推覆体－佛子岭岩群；４．基底碰撞杂岩－卢镇关构造混杂岩群。通过广泛的构造－岩石（地层）组合体的时代，岩相对比，并可得出北淮阳变质褶皱带是一南北近于对称的加里东、海西期复式褶皱带的结论。     

康滇地轴云南段遥感地质特征及找矿方向

着重阐述康滇地区云南段地层、岩浆岩的遥感影像解译标志以及区内线性构造、环形构造的影像特征。遥感影像显示,区内以南北向构造为主体,其次为东西向、北西向、北东向构造。本区各重要成矿富集区均位于线性构造的分枝复合交切部或不同构造影像的叠合部位。     

The terrestrial fauna of the Late Triassic Pant-y-ffynnon Quarry fissures,South Wales,UK and a new species of Clevosaurus (Lepidosauria: Rhynchocephalia)

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.     

Définition d'une limite multicritère ; stratigraphie du passage Campanien–Maastrichtien du site géologique de Tercis (Landes,SW France)Definition of a multi-criteria boundary; stratigraphy of the Campanian–Maastrichtian interval of the geological site at Tercis (Landes,SW France)

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.     

The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts

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.     

Quaternary stresses revealed by calcite twinning inversion: insights from observations in the Savonnières underground quarry (eastern France)

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).     

NONMETALS DEPOSITS

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.)     

MATHEMATICAL GEOLOGY

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,     

PROSPECTING EXPLORATION

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.)     

STRUCTURAL GEOLOGY

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-     

STRUCTURAL GEOLOGY

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