湖南石门砷（金）矿床中雄黄的矿物学研究

湖南石门砷（金）矿床内的雄黄富Ｓ亏Ａｓ,含Ｓｂ和微量的Ｈｇ、Ｓｅ、Ｔｅ、Ｂｉ、Ａｕ;晶胞参数ａ０＝９．３０９～９．５１１Ａ,ｂ０＝１３．５２～１３．６１Ａ,ｃ０＝６．５７２～６．５９３Ａ;晶体化学式为（Ａｓ０．９９９７Ｓｂ０．００１３）１．００１０Ｓ;红外吸收３４３、３７５ｃｍ－１;δＣｅ＜１,具明显负异常。本文还列出了雄黄的红外吸收光谱、Ｘ射线衍射谱、化学成分和稀土元素含量等资料。这些可作为该区雄黄的标型特征,对其它雄黄矿（床）点的研究、预测与评价有重要意义。     

云南乐红铅锌矿床氧化带中异极矿的矿物学特征及其意义

云南乐红铅锌矿床氧化带十分发育,呈细脉或葡萄状产于氧化矿石中的白色矿物曾被认为是菱锌矿,笔者对该矿物作了物理、光学性质,化学发,Ｘ射线衍射,红外光谱及失重和差热分析研究,确定其为异极矿。其晶体化学式为Ｚｎ３．９８（Ｓｉ２．０１Ａｌ０．０１）２．０２Ｏ７（ＯＨ）２．０３．０．８８Ｈ２Ｏ晶胞参数ａ＝０．８３８０（４）ｎｍ,ｂ＝１．０７１８（７）ｎｍ,ｃ＝０．５１２５（６）ｎｍ。对异极矿矿物学特征的全面     

我国首次发现的砷钙锌石和羟砷锌石的矿物学特征及其意义

我国首次发现的砷钙锌石和羟砷锌石产于内蒙古自治区额济纳旗老硐沟金矿脉氧化带矿石的空洞中。砷钙锌石多呈半自形或自形晶体，绿或淡绿色，透明，比重４．３２（计算）。Ｎｇ＝１．７７８，Ｎｍ＝１．７６０，Ｎｐ＝１．７５６，二轴晶（＋），２Ｖ＝４６°。化学分子式为Ｃａ０．９９（Ｚｎ０．９４Ｃｕ０．０７）１．０１［（ＡｓＯ４）０．９７（ＣＯ３）０．０３］１．００（ＯＨ），其中（ＣＯ３）２－取代部分（ＡｓＯ４）３－为红外光谱分析所证实，这不同于国外报道的砷钙锌石。据Ｘ射线粉末衍射分析的主要谱线，计算得其晶胞参数：ａ＝０．７４７３ｎｍ，ｂ＝０．９０１７ｎｍ，ｃ＝０．５９１６ｎｍ。羟砷锌石常呈集合体或单个晶体产出，淡黄绿色或无色，透明，比重４．４４（计算）。Ｎｇ＝１．７６１，Ｎｍ＝１．７３８，Ｎｐ＝１．７１９，二轴晶（＋），２Ｖ＝８７°。化学分子式为（Ｚｎ１．９７Ｃａ０．０２）１．９９（ＡｓＯ４）（ＯＨ）。据Ｘ射线粉末衍射分析的主要谱线，计算得其晶胞参数：ａ＝０．８３０４ｎｍ，ｂ＝０．８５１６ｎｍ，ｃ＝０．６０５４ｎｍ。氧化矿石的主要矿物组合为：臭葱石＋褐铁矿＋针铁矿＋砷钙锌石＋羟砷锌石＋自然金＋自然银＋石英＋方解石＋蛋白     

硅铁灰石在我国的首次发现

硅铁灰石是一种罕见的单链硅酸盐矿物，产于矿体围岩的晚期热液脉中，其晶体呈厚板状或矛头状，颗粒大小０．１ｍｍ—０．５ｍｍ，日光下呈黑色，强光源下呈浓茶绿色─棕色，玻璃光泽，条痕淡灰绿色，透明─半透明，维克显微硬度Ｈｖ１００ｇ＝３５９ｋｇ·ｍｍ－２，实测密度３．３５ｇ·ｃｍ－３，计算密度为３．３２ｇ·ｃｍ－３。偏光显微镜下显正高突起，具强多色性，Ｎｇ浅黄棕色、Ｎｐ暗绿色，二轴晶正光性，ＺＶ（＋）＝７６（１）°，折射率Ｎｇ＝１．７５９，Ｎｍ＝１．７３７，Ｎｐ＝１．７２８．Ｘ射线单晶衍射表明，硅铁灰石属三斜晶系，空间群为Ｐ１。由Ｘ射线粉晶衍射数据计算出晶胞参数ａ＝０．７４７５（１）ｎｍ，ｂ＝１．１８４４（１）ｎｍ，ｃ＝０．６６７９（１）ｎｍ，α＝９１°３４（３）′，β＝９３°４５（１）′，γ＝１０３°１９（１）′。硅铁灰石的晶体化学式为（Ｃａ２．０７１Ｎａ０．００７Ｋ０．００１）２．０７９（ＦｅＭｎＭ０．１７１）０．９９１（ＦｅＡｌＴｉ０．００２）１．０２１［（Ｓｉ４．９８９　Ａｌ０．０１１）５．０００Ｏ１４．１０１（ＯＨ）０．８９９］。硅铁灰石是酸式硅酸盐，不存在与阳离子结合的ＯＨ－离子，因而在红外光谱中缺失３４     

西藏南迦巴瓦峰地区发现的星叶石

在西藏境内喜马拉雅山脉的东端的南迦巴瓦峰地区发现了星叶石。该矿物产出于火成碳酸岩脉中，与白云石、方解石、镁橄榄石、镁铝尖晶石、金云母、韭闪石、磷灰石、镁钛矿、石榴石以及三种未定名副矿物共生。该矿物的晶胞参数为：ａ０＝５．３５６（１），ｂ０＝１１．６０７（４），ｃ０＝１１．８５１（６），α＝６４．５７°（３），β＝７６．９８°（４），γ＝８５．４５°（３）。化学成分（％）为：ＳｉＯ２３５．２２，ＴｉＯ２１１．４７，Ａｌ２Ｏ３１．１８，ＦｅＯ２８．９０，ＭｎＯ５．１５，ＭｇＯ１．５１，ＣａＯ１．７５，Ｋ２Ｏ５．９０，Ｎａ２Ｏ２．４６，总和９３．５４％，化学式为：（Ｋ，Ｎａ）３（Ｆｅ，Ｍｎ，Ｍｇ，Ｃａ）７Ｔｉ２Ｓｉ８Ｏ２４（Ｏ，ＯＨ）７。     

云南大硐厂铅锌矿床中的硫碲铋矿A

硫碲铋矿Ａ产于云南省大硐厂铅锌矿床，与自然铋、辉铋铅矿共生。晶体呈柱状，粒度０．０２￣０．３ｍｍ。反光显微镜下呈淡黄色，弱非均质性，反射率Ｒｃ′＝５２．４％，Ｒ０＝４８．８％（波长为５４０ｎｍ），显微压入硬度Ｈｖ＝４６￣７２ｋｇ／ｍｍ＾２。主要粉晶谱线：３．０６５（１０），２．１２０（７），１．３４６（５），２．２２０（４）。三方晶系，空间群为Ｄ３ｄ＾５－Ｒ３↑－ｍ，晶胞参数ａ＝０．４２４１ｎｍ，     

会聚束电子衍射对葡萄石空间群的辅助测定

利用透射电子显微技术测定了湖北大冶铁山矿床中的微米级葡萄石空间群。选区电子衍射几何构图法分析表明,该矿物系斜方晶系,衍射消光符号为Ｐｎ－－晶胞参数为α＝０．４５８,ｂ＝０．５５５和ｃ＝１．８５３ｎｍ。（１００）和（３０１）方向的会聚束电子衍射花样研究表明,其空间群为Ｐｎｃｍ。     

我国产出的砷铅矿族矿物的研究

砷铅矿族矿物是一族六方晶系的类质同象系列矿物，包括砷铅矿、钒铅矿和磷氯铅矿。砷铅矿呈淡黄色、浅黄绿色和灰白色六方柱状晶体产出，Ｈｍ＝３．５，Ｄ≥６．７５ｇ／ｃｍ３，一轴晶负光性，Ｎ＞２，晶胞参数为ａ０＝１．０２５１ｎｍ，Ｃ０＝０．７４４ｎｍ，Ｚ＝２。广西德保矿区产出的砷铅矿的化学成分为（ｗｔ．％）：ＰｂＯ７４．９４，Ａｓ２Ｏ５１９．５３，Ｐ２Ｏ５２．３１，ＣｕＯ０．３６，Ｃｌ２．４１，总量为９９．５５。云南个旧矿区产出的钒铅矿呈桔红色至红褐色，六方短柱状自形晶，Ｈｍ＝３．０，Ｄｘ＝６．９５ｇ／ｃｍ３，一轴晶负光性，Ｎ＞２，晶胞参数为ａ０＝１．０３１ｎｍ，Ｃ０＝０．７４３ｎｍ，Ｚ＝２，空间群为Ｐ６３／ｍ，其化学成分为（ｗｔ．％）：ＰｂＯ７９．９８，Ｖ２Ｏ５１８．９４，Ｃｌ２．６１，总量为１０１．５３。广西阳朔产出的磷氯铅矿，呈暗绿色六方柱状晶体产出，Ｈｍ＝３．５，Ｄ＝６．９８ｇ／ｃｍ３，一轴晶正光性，Ｎ＝２±，平均化学成分为（ｗｔ．％）：ＰｂＯ８１．６４，Ｐ２Ｏ５１５．０８，Ａｓ２Ｏ５０．１０，ＣｕＯ０．２０，Ｃｌ２．６７，总量为９９．６９。     

氟碳铈矿和氟铈矿晶体结构的精确测定

用强功率四圆单晶衍射仪精确地修正了氟碳铈矿和氟铈矿的晶体结构．氟碳铈矿（ｂａｓｔｎａｅｓｉｔｅ，Ｃｅ（ＣＯ３）Ｆ）属六方晶系，其晶胞参数为：ａ＝０．７１４３８（９）ｎｍ，ｃ＝０．９８０８（２）ｎｍ，γ＝１２０°，Ｚ＝６，空间群Ｐ６－２ｃ．使用３６７个（Ｆ≥３σ（Ｆ））独立衍射点，经多轮最小二乘法修正后，最终获得偏离因子Ｒ＝０．０４９９．氟碳铈矿的晶体结构特征表现为［ＣＯ３］平面三角形平行ｃ轴分布，铈的配位数为９，Ｃｅ－Ｏ（Ｆ）平均键长为０．２５１５ｎｍ，Ｃ－Ｏ平均键长０．１３２７ｎｍ，每个氟原子与周围三个铈原子相连．氟铈矿（ｆｌｕｏｃｅｒｉｔｅ，ＣｅＦ３）属六方晶系，其晶胞参数为：ａ＝０．７１４１２（２１）ｎｍ，ｃ＝０．７２９８９（２１）ｎｍ，γ＝１２０°，Ｚ＝６．其空间群为：Ｐ３－ｃ１（Ｎｏ．１６５）．使用３２１个（Ｆ≥３σ（Ｆ）））独立衍射点，经多轮最小二乘法修正后，最终获得偏离因子Ｒ＝０．０５４２．氟铈矿的晶体结构表现为每个氟原子与周围三个铈原子相连接，每个铈原子与周围９个氟原子相连，铈的配位数为９，Ｃｅ－Ｆ平均键长为０．２４６８ｎｍ．     

天然矿物Wadsleyite在我国首次发现

对于在毫县陨石中发现的Ｘ矿物，本文用电子探针获得了其化学成分：ＳｉＯ４，用Ｘ射线微区衍射得到了其结构参数。该矿物属斜方晶系，晶胞参数ａ＝０．８２６４，ｂ＝１．１４４８，ｃ＝０．５７０４ｎｍ。这些结果证明了它是Ｗａｄｓｌｅｙｉｔｅ，是橄榄石的高压相－β－（Ｍｇ，Ｆｅ）２ＳｉＯ４由冲击变质作用形成的。该矿物呈包裹体产出，在我国属首次发现。     

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.     

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     

OCEANOGRAPHY & MARINE GEOLOGY

正20140582 Fang Xisheng(Key Lab.of Marine Sedimentology and Environmental Geology,First Institute of Oceanography,State Oceanic Administration,Qingdao 266061,China);Shi Xuefa Mineralogy of Surface Sediment in the Eastern Area off the Ryukyu Islands and Its Geological Significance(Marine Geology Quaternary Geology,ISSN0256-1492,CN37     

ENVIRONMENTAL GEOLOGY

正20141810 Bian Yumei(Geological Environmental Monitoring Center of Liaoning Province,Shenyang 110032,China);Zhang Jing Zoning Haicheng,Liaoning Province,by GeoHazard Risk and Geo-Hazard Assessment(Journal of Geological Hazards and Environment Preservation,ISSN1006-4362,CN51-1467/P,24(3),2013,p.5-9,2 illus.,tables,refs.)