楚雄小水井—西西郎金矿带成矿空间

西西郎-小水井金矿带控矿因素为断裂和地层,岩浆期后热液、变质水及地下热卤水通过渗滤富集作用形成的微粒浸染型金矿床。该区是有理想的成矿空间。     

滇中小水井金矿床控矿构造与矿化富集规律

构造控矿是小水井金矿床的主要特点,本文通过对矿床控矿构造空间形态、构造岩分带、活动期次、力学性质、矿床构造类型的研究,认为小水井金矿床受控于区域三级断裂(F3),其内更次级的断层、剪切裂隙破碎带、层间破碎带控制了矿体的空间产出位置;矿床控矿构造类型为脆-韧性剪切断裂构造,构造破碎带起码经历了三期应力作用的改造,早期为压扭性韧性剪切变形,中、晚期为张扭性脆-韧性剪切变形,后期为脆性剪切作用—形成碎裂状岩石;矿床金矿化作用主要与中、晚期的脆-韧性剪切变形作用有关,发生在脆-韧性剪切变形阶段或稍晚。进而总结了金矿化富集规律,指出在断裂产状变化地段、不同方向断层交切附近、破碎带的膨大部位,是厚大透镜状矿体富集的有利空间;破碎带变窄地段,矿体变薄、尖灭,形成脉状矿体。     

《云南地质》二○○三年(第22卷)总目次

第 1期 (总第 85期 )论喀斯特地貌的成因与演化 (英文 )俞遵典 ( 1 )……………………………五里冲水库———治理和利用喀斯特溶洞的范例张光聪　张　鸿 ( 1 6 )……国内外卡林型金矿对比研究普传杰　高振敏 ( 2 7)…………………胜境关 东铺金矿矿田地质曾祥平 ( 39)…滇东南那能金矿带之断裂控矿吕世琨……………………………李爱平　杨绍文　雷跃增　赵　禹 ( 4 7)礼社江中上游微粒金矿矿田地质及控矿因素廖南鸿 ( 56 )………………………楚雄小水井金矿矿床地质及区域远景刘　涛　何照波　周　仁 ( 6 4)………大坎子金矿地质及成矿条…     

滇东南那能金矿带之断裂控矿

根据那能金矿近年勘查及开发资料，发现该区金矿与近EW向断裂构造间存在极密切的成生联系，并在断裂控矿特征上有诸多具体表现。以矿区实际资料为主要依据，探讨断理解控矿模式，认为断裂控矿、矿体固定及矿床远景评价之间亦具有不可忽视的关联。结合在矿带（区）中实际运用断裂控矿规律，对那能金矿带作预测性远景评价。     

云南金矿带划分及成矿规律

云南岩金矿床可划分9条成矿带（区）,金矿储量占全省岩金上表总储量96．42％,有充分代表性。金沙江-哀牢山富碱斑岩金矿带,包括北衙（大型）、金厂箐（中型）、小水井（大型）、长安（大型）等金矿,上表储量66．06t,远景储量240t。首次将小水井、长安金矿列为富碱斑岩型金矿床。广南-富宁矿集区,包括老寨湾（大型）、那能（中型）、堂上（中型）等金矿,上表储量35．889t,工程控制储量达82．549t。P3β^1、P3β^2、P3l等层位赋存玄武岩型金矿;D1、T1、T2层位赋存卡林型金矿,成因与岩浆活动有关,为燕山期中-低（主）温热液矿床,属扬子地块西南缘低温成矿区重要组成部分。     

断裂构造的几何学、运动学特征及其对金矿体就位控制研究──以黔西南卡林型金矿为例

笔者从事黔西南卡林型金矿的普查找矿与勘探工作10余年，深刻地体会到断裂构造是区内最重要的控矿构造，特别是断裂构造的几何学、运动学特征决定了金矿体的就位空间，铸就了金矿体的形态和产状。这里，笔者试图通过对几个金矿区主要控矿断裂构造的深入观察、应变测量与综合分析，探讨控矿断裂构造的几何学、运动学特征及其对金矿体就位的控制机理，以揭示和论证矿体赋存空间与特殊的构造部位两者之间的有机联系，并强调在金矿的普查勘探工作中要特别重视对控矿断裂构造的几何学、运动学要素等地质资料的收集和综合研究。     

玲珑金矿田不同级别构造控矿特征

在我国著名的胶东玲珑金矿田中，发育有众多的断裂构造，这些断裂构造具有明显的主次之分，并对金矿化起着不同的控制作用。其中，破头青断裂为一级控矿构造，它控制了整个金矿田矿脉的空间分布、矿化类型、矿物组合以及矿化深度的规律性变化。玲珑断裂为二级控矿构造，它控制了次级矿脉的富矿段，导致矿脉的斜列及走向变化，其产状对两侧次级矿脉的赋矿标高产生一定的制约。矿田内其他NE—NEE方向的众多断裂为三级控矿构造，它控制了矿体的产出位置、形态、产状等。     

新疆西天山吐拉苏火山盆地金矿的构造控矿规律

新疆西天山吐拉苏火山盆地金矿在不同尺度上受不同级别的构造控制。在大地构造尺度上，Ⅰ级控矿构造为与博罗科努丰生代岛弧带平行的NWW向基底断裂带，该断裂带控制与石炭纪火山岩有关的金矿带的展布，在区域尺度上，Ⅱ级控矿构造为NW向走滑断裂和NE向张笥断裂，控制金矿床的分布。在矿床尺度上，Ⅲ级控矿构造为陡倾的近SN向张性断裂和与破火山口有关的环状断裂，控制金矿体的定位和产状。     

四川南坪马脑壳金矿区的构造与成矿

论述了马脑壳金矿区成矿地质构造背景和构造变形特征，探讨了构造演化及应力场特征。重点总结了构造控矿规律：即不同级序断裂对金矿的控制、NWW向韧脆性扭压性断裂及NIVE－NE向张扭性断裂对金矿的控制、断裂性质转化及复合叠加对金矿的控制、控制金矿化局部富集的构造因素、控矿断裂构造地球化学特征及与成矿的关系。指出本区金矿的形成经历了成矿物质多期活化—迁移—富集的复杂演化过程。     

河南嵩县萑香洼金矿床断裂构造控矿特征

萑香洼金矿床产于华北陆块南缘中元古界熊耳群火山岩系中．矿床严格受断裂构造控制。本文根据区域和矿区断裂构造特征，分析了萑香洼金矿床不同构造层次对金矿的控矿作用，总结了断裂构造的控矿特征，认为区域性深大断裂(Fm、Fs、F1)为导矿构造，控制金矿带、矿床的分布；次级的NW向(F985等)和近E-W向(F14等)断裂构造为主要容矿构造，控制矿体的产出；NNE向(F201等)断裂为成矿后构造，起破矿作用。容矿断裂在主成矿期经历了“挤压-拉张”的脉动式活动．具“韧脆性”特征。     

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.     

Late Wuchiapingian (Late Dzhulfian,early Late Permian) limestone olistolites within the Tertiary flysch of Glypia Unit (Mount Parnon,central–eastern Peloponnesus,Greece)

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.     

PALEONTOLOGY

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.)     

GEOCHEMICAL EXPLORATION

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.)     

MICROPALAEONTOLOGY

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.)     

PETROLOGY

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.,     

ENVIRONMENTAL GEOLOGY

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     

PROSPECTING EXPLORATION

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