砷,汞,锑,金矿床铊的赋存状态,成矿模式与找矿标志

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。铊亲硫和新石地球化学性质铊赋存形式。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。     

砷、汞、锑、金矿床铊的赋存状态、成矿模式与找矿标志

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。     

南华砷铊矿床中－种铁的硫砷化合物矿物新发现

南华砷铊矿床中－种铁的硫砷化合物矿物新发现张宝贵，王三学，张忠，张兴茂，王明再（中国科学院地球化学研究所．贵阳５５０００２）关键词砷铊矿床，铁的硫砷化物，云南本文报道的铁的硫砷化物矿物产在云南南华砷铀矿床中，是矿床主要含纯矿物之一。铅灰白色，不透明，...     

南华砷铊矿床元素地球化学和成矿模式

南华砷铊矿床位于云南省南华县城东南,北距县城５５ｋｍ。矿床产于上侏罗统江边组雄黄厂段（Ｊ３＾１ｃ）,以砷和铊元素组合为特征,属于典型的低温热液改造矿床。通过矿床地质、稀土元素和成矿模式的研究,对矿床成矿作用进行讨论。卤素,尤其氯是铊富集成矿的矿化剂,铊价态变化在富集成矿过程中具有重要作用。成矿流体是具有Ｃｅ和Ｅｕ负异常的酸性溶液,基本保留了矿源层的稀土分布模式。在成矿过程中亲石元素和亲硫元素均不同     

铊地球化学和铊超常富集

铊的地球化学性质受其电子构型和地质地球化学作用制约。铊原子处于基态时的电子构型为6S26P1。铊有两个地球化学价态,正一价和正三价,自然界多数呈正一价。铊的电子构型和地球化学性质,使其具有低温成矿、亲硫;高温分散、亲石的双重地球化学性质。在低温高硫还原环境,铊表现出强烈的亲硫性,不仅与汞、锑、砷、铜、铅、锌、铁、金、银等一道参与有色金属和贵金属矿床的成矿作用,而且形成铊的硫化物矿物、铊矿体和铊矿床;在高温低硫环境中,铊表现出明显的亲石性。由于铊的地球化学和结晶化学性质与钾、铷、铯很相近,因此使铊以类质同象形式进入长石、云母、闪石、白云石、迪开石、高岭石等矿物中,导致铊分散。作者尝试性提出,铊超常富集是指其含量普遍达到大于铊成矿的工业品位(n×10-4)或大于铊地壳丰度(0 75×10-6)100倍以上。铊矿区矿物、岩石、土壤、水体、生物和人体中铊含量明显高,且普遍是判别铊超常富集的标志。     

硫砷铊铅矿（PbTlAs5S9）在中国的发现和研究

硫砷铊铅矿（Ｈｕｔｃｈｉｎｓｏｎｉｔｅ）产于云南省南华砷铊共生矿床之中。矿物颗粒微小，多小于５μｍ，１０￣１５μｍ占少数。主要共生矿物为雄黄、雌黄、方铅矿和白云石等。赋矿地层为上侏罗统雄黄厂段，主要由白云岩、灰岩、泥岩和粉砂岩组成。硫砷铊铅矿为樱红色至暗红色，条良樱红色，油脂光泽，性脆，断口贝壳状，反射率绿光（５４７ｎｍ）Ｒａ为２６．６％，Ｒｒ为２３．３％。电子探针７个样品平均化学成分（重量％）；     

南华砷铊矿床碱金属碱土金属和稀土元素地球化学

南华砷铊矿床位于云南省南华县不南,距县城５５ｋｍ。矿床主要产于上侏罗统江边组雄黄厂段,以砷和铊元素组合为特征,属于典型的低温热液改造矿床,通过矿床地质、碱金属、碱土金属和稀土元素的地球化学研究,对矿床成矿作用进行讨论。和流体是具有δＣｅ和δＥｕ负异常的酸性溶液,基本保留了矿源层的稀土分布模式。在成矿过程中亲石元素的亲硫元素均不同程度地参与在矿作用。     

兴仁滥木厂汞铊矿床矿石物质成份与铊的赋存状态初探

本文简要介绍了滥木厂汞铊矿床的区域地质背景和矿床地质特征，着重对矿床矿石的物质组成和铊的赋存状态进行了初步研究。铊在矿床中除形成红铊矿和少量其铊矿物外，大部份以类质同象、离子吸附状态分散存在于各种硫化物矿物中，特别是富砷的胶状黄铁矿是最主要的载铊矿物。矿床内有独立存在的富铊矿体和含矿体，通过实验室实验已获取了一粒绿豆大小的金属铊。这些均为开发利用贵州的铊资源提供了光明前景。     

中国主要类型锑矿床硫同位素组成及地球化学特征

中国主要类型锑矿床的硫同位素组成范围变化很大,锑矿床中各种矿物（辉锑矿、黄铁矿、闪锌矿、雄黄、方铅矿、重晶石、毒砂、辰砂、脆硫锑铅矿）的δ３４Ｓ值从－３２．７‰变化到＋３４．８‰,极差值高达６７．５‰。各类锑矿床中矿物的硫同位素组成变化各异,说明锑矿床成因较复杂,硫的来源不仅有海水中沉淀的硫酸盐硫,而且还有生物、细菌形式的还原硫和深源硫（岩浆作用、喷流作用等）,从而形成不同类型或成因复杂的锑矿床     

中国雄黄雌黄矿床类型、成矿机制与找矿方向

中国雄黄雌黄矿床,根据成矿作用、地质产状、成矿地质构造环境和地球化学特点分为三大类七种类型。即层控型（下关式单一雄黄矿床,水落式多金属雄黄矿床）、热水沉积型（界牌峪式雄黄雌黄矿床,松潘式金砷矿床）、热液型（石峡式辰砂、雌黄矿床,王庄式辉锑矿雄黄矿床和宁陕式金、钨、铊、雄黄矿床）。三大类矿床成矿机制各异。应在适宜的地层、大地构造区域,根据有利的矿物、地球化学等信息寻找该类矿床。     

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.     

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).     

HYDROGEOLOGY

正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level     

METAMORPHIC PETROLOGY

正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7),     

SERIALS

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GEOPHYSICAL EXPLORATION

正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci-     

QUATERNARY GEOLOGY & GEOMORPHOLOGY

正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli-     

PETROLEUM GEOLOGY

正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.)     

GEOCHEMISTRY

正20142002 Wei Hualing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang065000,China);Zhou Guohua Element Content and Mineral Compositions in Different Sizes of Soil in Tongling Area,Anhui Province(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(11),2013,p.1861     

ENGINEERING GEOLOGY

正20141768 An Shaopeng(Institute of Rock and Soil Mechannics,Chinese Academy of Sciences,Wuhan 430071,China);Wei Lide Experimental Study on Mechanical Behavior of Xigeda Formation Siltstone and Structure Interface(Journal of Engineering Geology,ISSN1004-9665,CN11-3249/P,21(5),2013,p.702-708,9illus.,1 table,16 refs.)