碲硫铋矿(Bi_2TeS_2)在我国的首次发现和研究

碲硫铋矿(Csiklovaite)是一种很少见的矿物。国外报导的产地只有两处:罗马尼亚的锡克洛夫(Csiklov)(首先发现)和匈牙利;但其含量都很低,粒度细小,矿物学研究不够。福建马坑的碲硫铋矿在我国是首次发现,矿石含碲达百万分之几,在选矿产品中碲可富集到千分之几。碲主要呈碲硫铋矿和辉碲铋矿(Tetradymite)存在。     

江西盘古山钨矿床的碲化物特征及富集成因

江西盘古山钨矿是一个钨、铋、碲均可综合利用的大型矿床,有关其碲化物的特征及成矿流体的物理化学条件研究尚属空白.文章在整理和总结前人研究成果的基础上,对矿床中碲化物开展了详细的矿相学鉴定、电子探针和流体包裹体测温.结果显示,盘古山钨矿床的碲化物主要有硫碲铋矿A、硫碲铋矿B、应硫碲铋矿、巴硫碲铋矿、硫楚碲铋矿及辉碲铋矿.矿床碲化物由浅至深有依次出现硫碲铋矿A、巴硫碲铋矿、硫碲铋矿B、应硫碲铋矿、硫楚碲铋矿、辉碲铋矿的趋势,矿物逐渐富Te元素而贫Bi、S元素.流体包裹体测温显示碲化物最小捕获温度为152～395℃,碲逸度为-11.0＜1ogf(Te2)＜-7.1,硫逸度为-12.54＜logf(S2)＜-9.39.研究认为,温度和f(S2)的降低,及f(Te2)/f(S2)的相对增大是碲化物沉淀的关键因素.碲化物的空间分带可能是随着成矿流体物化条件的变化导致Bi2S3-PbS矿物系列中Bi被Pb置换、S被Te置换的结果.     

国内首次发现应硫碲铋矿

应硫碲铋矿(Ingodite)作为新矿物首先由苏联发现并作了报导。去年,我院在江西盘古山钨矿床有关专题研究中,也发现了这一新矿物。仅比苏联晚大约八个月的时间。国内首次发现的应硫碲铋矿产于盘古山钨矿床的Bi_2S_3-PbS系列矿物之中。尽管本矿床的含矿石英脉中发育有一系列的硫盐矿物和碲铋矿族矿物,而且其种类之多、颗粒之大都是其它矿区所少见的。但是,应硫碲铋矿在本矿区的分布并不普遍,仅见于少数的光片中。此矿物与本矿床中较为常见的硫碲铋矿B紧密连生。硫碲铋矿B与本矿中另一较为常见     

自然界中的辉锑矿-硒锑矿矿物系列

自然界中的辉锑矿-硒锑矿系列发现于西秦岭寒武系拉尔玛、邛莫金矿床中。与其密切共生的矿物有硒汞矿、硒铅矿、硒质块硫锑铜矿、硒镍矿、自然金以及石英、重晶石等。辉锑矿–硒锑矿系列的显微压力硬度为101.26~103 kg/mm²。主要元素的质量分数为: Sb 43.78%~73.81%,S 0.00%~28.76%,Se 0.00%~49.72%(但缺乏30.59%~43.04%之间的数据)。根据电子探针分析数据中Se/(S+Se)比值(原子比),可将所测矿物系列划分为(含硒质)辉锑矿、硒质辉锑矿、硫质硒锑矿和(含硫质)硒锑矿。矿物系列代表性的反射率(%)：(470 nm)Rg’=42.62~47.62,Rp’=30.83~40.55;(550 nm)Rg’=41.84~46.75,Rp’=31.48~38.85;(590 nm)Rg’=42.25~46.63,Rp’=30.73~39.46;(650 nm)Rg’=43.30~46.48,Rp’=30.01~41.56。两个含Se量为3%~5%含硒质辉锑矿的晶胞参数值为:a=1.120 9~1.121 2 nm,b=1.1299~1.130 3 nm,c=0.384 7~0.384 9 nm;而硫质硒锑矿、硒锑矿的晶胞参数值分别为：a=1.159 1~1.159 3 nm;b=1.172 4~1.174 7 nm;c=0.394 1~0.398 4 nm。晶胞参数的变化与矿物中硫、硒含量变化密切相关。     

新发现 新观点 新动态

我国发现碲原生矿床这个离四川石棉县安顺场15km的碲矿含碲1～2％,高者达36.6％,矿石矿物主要是辉碲铋矿。单碲(铋)矿的发现为世界罕见。南京发现相当完整的猿人头盖骨这是中科院南京地质古生物所和古脊椎动物与古人类研究所在地方政府部门配合下发现的。据鉴定,不论是头盖骨本身,或者与之共生的动物群面貌,均与北     

我国首次发现硫碲铋铅矿

我们在河北省尚义县大青山金矿开展研究工作时,于矿石中发现了硫碲铋铅矿,这种矿物是七十年代在苏联首先发现的,在我国尚属首次。该矿物以含 S、Pb、Te、Bi 为主,是一种复杂的硫盐矿物。1.地质产状硫碲铋铅矿产于河北省北部尚义县与内蒙兴和县交界处的大青山金矿,矿石及矿物标本采于矿区的开采坑道内。大青山金矿为产于侏罗纪碎屑沉积岩中的石英脉型金矿床,在大地构造位置上位于华北地台北缘内蒙地轴与燕山沉降带的过渡部位。     

新矿物—赤路矿的发现和研究

赤路矿(chiluite),是一种含铋、碲、钼、氧的新矿物,化学分子式是Bi_6Te_2Mo_2O_(21)。 赤路矿产在辉铋矿石英脉中,与硫碲铋矿、辉钼矿、钼铋矿共生,常呈羽毛状或不规则粒状,有时可见六边形晶体,粒度一般<30μm,反光显微镜下呈灰色,弱非均质,反射率560nm,R′g 18.10％,R′p 17.15％,透射光下褐色,一轴晶负光性,折光率ω=2.4,ε=2.3,硬度3.2,比重3.65。X射线粉晶分析,赤路矿属六方晶系,主要线条:d_(meas)A(I)(hkl)是3.300(10)(004),3.050(9)(104),2.510(5)(105),2.060(5)(312),1.655(5)(008)。电子探针分析结果,Bi61.66,Te11.19,Mo10.29,O16.06。 在400-900℃条件下合成了赤路矿的同质多象晶体,并进行了红外光谱,差热分析及电子能谱测定元素价态等研究工作。     

硫碲铋铅金矿在我国的首次发现和研究

硫碲铋铅金矿（AuPb2BiTe2S3）是1991年国际新矿物及矿物命名委员会（CNMMNIMA）批准的新矿物，产于美国科罗拉多（Colorado）州的巴克霍恩（Buckhoun）矿山。我们于1986年发现了该矿物，但呈报CNMMNIMA晚于美国。我国的硫碲铋铅金矿产于河南灵宝出岔-乱石和桐沟两个石英脉型金矿。该矿物为柱板状晶体，粒径0．03～0．2mm，黑色，一组解理发育，金属光泽。显微硬度为64～129kg／mm2，（负荷10g），反射色为灰色，微带蓝色色调，非均质性明显，无内反射，以等能光源（SE）对R1和R2计算的颜色指数分别为：x0．323，y0．326，Y％42.69，λd480，Pe％0．04；和x0．326，y0．326，Y％43．70，λd476，Pe％0．03。电子探针分析结果为：CU0.02，Au16．96，Ph35．34，Bi15．93，Te20．79，S8．21。化学式为：Au1.03Ph2.04Bi0.91Te1.95S3.06，斜方晶系，a＝0．41，b＝1．25，c＝0．95nm，V＝0．487nm3。理论比重Dx＝7．94。     

俄罗斯东北部金——稀有金属矿床

本区金矿床的成因与晚中生代花岗岩类有关,分布范围广泛,分为３种类型：矽卡岩型、云英岩型及稀有金属石英脉型。矿体以脉状、网脉状、浸染状、块状等多种形式出现,在矿石中早期金多与铁、镍、钴的硫砷化物、砷化物紧密共生,晚期金则与含铋矿物共生（自然铋、辉铋矿、脆硫铋矿、碲化物和硫碲化物）。矿石中金为细粒金和次显微金;在矽卡岩型及云英岩型金矿石中,粒径小于０．１ｍｍ的金占总量的９０％,而在稀有金属石英脉型金矿     

俄罗斯东北部金—有金属矿床

本区金矿床的成因与晚中生代花岗岩类有关,分布范围广泛,分为3种类型：矽卡岩型、云英岩型及稀有金属石英脉型．矿体以脉状、网脉状、浸染状、块状等多种形式出现．在矿石中早期金多与铁、镍、钴的硫砷化物、砷化物紧密共生,晚期金则与含铋矿物共生(自然铋、辉铋矿、脆硫铋矿、碲化物和硫碲化物)．矿石中金为细粒金和次显微金：在矽卡岩型及云英岩型金矿石中,粒径小于0．1mm的金占总量的90％,而在稀有金属石英脉型金矿石中则占总量的60％,成色介于400～950之间．矿石中金分布不均匀,特别是在脉型矿石中,有时形成矿囊,单—矿 床金属储量不大(1～30t),平均品位7×10-6～15×10-6．在温度360～200℃,压力2000～500Pa条件下,金—稀有金属矿化形成于还原环境中,溶液中氯化物浓度相对较高,砷具有高位能．地质学、矿物地球化学及温压数据表明,金—稀有金属矿化与大陆边缘岩浆岩弧及碰撞环境中形成的I型钛铁矿和磁铁矿系列的花岗岩类有关．     

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.)