福建政和星溪金矿床构造控矿特征及找矿前景

通过政和星溪金矿区矿床地质和构造控矿特征分析,指出了矿区找矿远景和外围找矿靶区,认为矿区内及外围找矿前景广阔。     

姚家岭锌金多金属矿床三维地质建模与成矿预测

姚家岭锌金多金属矿床位于长江中下游成矿带铜陵矿集区东部。前人对姚家岭矿床开展了一系列矿床学、地球化学研究和找矿勘探工作,但在矿区进一步的找矿勘探工作中存在诸多问题,主要原因为姚家岭矿床地质特征复杂,先期的矿床普查勘探和综合地质研究程度不够。近年来一些学者基于新的勘探成果对于姚家岭矿床的地质特征、矿床成因等有了新认识。本文基于姚家岭矿床新的地质勘探数据和研究成果,利用GeoModeller隐式三维地质软件重新构建了矿区三维地质模型,深入解析了姚家岭地区复杂的地质特征和构造形态,并进一步利用三维成矿预测方法对矿区深部未探明的层控式和接触式矽卡岩型矿体进行了预测,圈定了深部找矿靶区。相关研究成果可为矿区内进一步的找矿勘查工作提供参考和方向。     

内蒙古柴河地区二道河铅锌银矿外围隐伏矿体预测

二道河铅锌银矿床的成矿地质条件和产出的大地构造背景优越,其矿区及外围存在隐伏矿体的可能性较大。为深入研究矿区外围的找矿潜力,通过对二道河矿床地质、地球物理和地球化学特征的研究,结合区域成矿背景,利用地质简测、土壤地球化学测量和激电中梯测量相结合的综合信息找矿方法对矿区外围河口林场预测区进行了隐伏矿体预测。结果表明,河口林场预测区具有与二道河矿床相似的成矿地质条件,地球化学和地球物理异常套合程度高。通过靶区优选,区内共圈定出3 个重点找矿靶区和1 个次重点找矿靶区,推测其为铅锌银矿体赋存的最佳部位,为矿区及外围找矿提供依据。     

湖南省香花岭三合圩锡多金属矿区地质特征及找矿预测

湖南省三合圩锡矿区位于香花岭矿田北侧，为全隐伏锡铅锌多金属矿。通过找矿实践及矿床地质特征研究，认为三合圩矿床主要控矿条件是隐伏侵岩体及断裂扩容构造，总结了矿区找矿预测模型，并预测了找矿有利靶区。     

四平市三家子白钨矿床物化探特征及找矿预测

三家子白钨矿矿床是东北地区近年来发现的两个独立白钨矿矿床之一。本文通过对矿体地质、地球物理、地球化学特征研究基础上,提取了该区与钨矿有关的地质、地球物理、地球化学信息,建立找矿标志,经对比分析,对三家子白钨矿矿区进行了找矿预测,圈定出矿区西南部预测区,提出了下一步找矿方向。     

北衙金矿床构造地球化学特征及靶区优选

在总结矿床地质特征的基础上，研究了矿床的构造地球化学特征，然后提出了地质和构造地球化学找矿标志，并据此在矿区内圈出了若干找矿靶区。     

贵州省威宁县云炉河坝铅锌矿床地质特征

在简述矿区地层、构造特征基础上,重点总结分析了矿(化)体、矿石质量、围岩蚀变等特征,探讨了矿床成因,分析总结其控矿因素及找矿标志,依此对找矿远景区进行划分,指出矿床具较大的找矿远景。     

滇西北香格里拉市红牛—红山铜矿勘查系统模型

滇西北红牛—红山铜矿床是义敦—沙鲁里岛弧上与晚白垩纪中酸性侵入体有关的典型的斑岩-矽卡岩-热液型铜矿床。本文通过对其成矿地质背景、矿床地质特征、矿化富集规律及成矿模式、矿床地球物理和地球化学特征的综合研究，建立了红牛—红山铜矿床的"大比例尺地质填图和综合研究+重力+激电和高精度磁测+土壤化探测+工程验证"组合勘查技术方法、"燕山晚期石英二长斑岩+接触带矽卡岩和层间破碎带矽卡岩+重力低异常+高磁异常+高视极化率和低视电阻率异常+Cu-Mo-Pb-Zn-Ag-Au等元素综合异常"组合勘查模型。地质调查研究确定矿床成矿地质体和找矿地质体、矿化类型及其空间分布规律，建立矿床"四位一体"的成矿模式和区域-矿区地质找矿模型。区域中小比例尺的土壤化探测量确定区域找矿靶区，大比例尺土壤化探测量进一步缩小找矿靶区，逼近矿体赋存部位。矿区处于1∶5万土壤测量圈定的Cu-Pb-Zn-Mo-Au-Ag元素综合高异常区，1∶2.5万土壤测量圈出Cu-Pb-Zn-Ag-W元素综合异常面积较大、强度高、浓集中心明显、元素套合好，与矿区铜（铁）矿体赋存区域异常相对应。区域重力低异常区和正磁异常强度高区域是重要的找矿靶区，矿区大比例尺磁异常和激电异常区确定了矿体的空间位置和产状；矿区铜（铁）矿体赋存区为低视电阻率、高视极化率异常区，高精度磁测表现为正负磁异常相伴。矿区地质-地球化学-地球物理综合勘查模型对矿区深边部找矿起到重要的指导作用。     

福建武平何屋一带银金多金属矿找矿远景

何屋一带找矿远景区处于福建省重要的金银铜等多金属Ⅳ级成矿带中,与紫金山金铜矿床处于同一地质构造单元,属紫金山矿田组成部分;与悦洋矿区和三鑫矿区接壤,其成矿地质背景基本相似,地质特征具有明显的“三层结构”.运用矿床成矿理论和老矿区周边与深部“探边摸底”的找矿思路,认为悦洋矿区矿体向南延入该区,具有较大的找矿潜力,可望找到一处“悦洋式”矿床类型的矿产地.     

综合物化探方法在乌兰德勒钼矿勘查中的应用

乌兰德勒钼矿区地表覆盖严重,地质找矿标志不明显,综合物化探方法对发现和圈定钼矿体起到了重要作用。总结矿床的地球物理、地球化学找矿标志,对于处于同一成矿远景区的其他地段寻找该类型矿床,具有十分重要的意义。     

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