福建紫金山铜金矿床中的完整Cu-S体系矿物

在电子探针微区化学成分分析的基础上,结合 X 射线粉末衍射分析,对福建紫金山铜金矿床中的 Cu-S 体系矿物进行 了化学成分和晶体结构特征的研究。结果在该矿床中发现较完整的 Cu-S 体系矿物系列,包括铜蓝、雅硫铜矿、斯硫铜矿、 吉硫铜矿、斜方蓝辉铜矿、蓝辉铜矿、久辉铜矿和辉铜矿。此外,利用粉末 X 射线衍射数据,计算了铜蓝、斜方蓝辉铜矿、 蓝辉铜矿、久辉铜矿、辉铜矿等五种矿物的晶胞参数。基于系统矿物学的研究,建立了紫金山铜金矿床 Cu-S 体系完整矿物 的结晶与变化序列,该工作在国内尚属首次,同时也丰富了 Cu-S 体系矿物基础矿物学研究的资料。     

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。     

东坪金矿床中几种含氧金矿物的发现

含氧金矿物在自然界很少产出。经研究，在东坪金矿床中发现了几种含氧金矿物，从成分和物性看可能为新矿物，其化学式为：Ａｕ２（Ｐｂ，Ｆｅ）ＴｅＯ５，Ａｕ２Ｐｂ，（Ｔｅ，Ｓ）Ｏ６，Ａｕ２Ｚｎ（Ｔｅ，Ｐｂ）２Ｏ６，Ａｕ２（Ｚｎ，Ｐｂ）２ＴｅＯ６，Ａｕ２ＣｕＴｅＯ４和Ａｕ２Ｔｅ２Ｏ５。对这些矿物的地质产状和矿物组合，形态及物理性质，光学性质，化学成分作了研究，取得了许多矿物学资料，但Ｘ射线衍射分析结果不理想，     

中国金属矿床中的铋硫盐矿物及其地质产出特征

目前,我国金属矿床中见到铋硫盐矿物共４６种,其中有８种未定名矿物。在ＰｂＳ＿Ｂｉ２Ｓ３系列矿物中,实验矿物学（Ｌ．Ｌ．Ｙ．Ｃｈａｎｇ）上已有的１０种ＰｂＳ－Ｂｉ２Ｏ３系列矿物,即由富硫铋铅矿→硫铋铅矿→针辉铋铅矿→柱辉铋铅矿→斜方辉铋铅矿→卡辉铋铅矿→辉铋铅矿→杂硫铅铋矿→斜方硫铋铅矿→柱硫铋铅矿,我国应有尽有外,还发现有４种ＰｂＳ－Ｂｉ２Ｓ３的未定名的矿物。块辉铋铅银矿中暂定的３个亚各,我 辄全     

两种未定名硒矿物的研究

本文研究的两种未定名硒矿物产于贵州省５０４轴汞钼多金属矿床内的含铀－硒方解石脉中。经ＪＣＸＡ－７３３型电子探针Ｘ射线显微分析仪分析，其平均化学成分（重量％）分别为：Ｓｅ４８．８０，Ｓ０．１１，Ｃｕ１７．４２，Ｈｇ１．６５，Ｓｂ３４．０８，Ｎｉ０．０２，Ｆｅ０．０５，Ａｓ０．５８及Ｓｅ３８．８９，Ｓ１．６５，Ｃｕ１７．７９，Ｈｇ２１．６３，Ｓｂ１９．５４，Ｎｉ０．０３，Ｆｅ０．１５，Ａｓ０．３３。它     

夏塞银多金属矿床中硫化物和硫盐系列矿物特征及其意义

夏塞矿主档是大型的热液脉型银多金属矿床,通过对大量矿石光（薄）片观察和电子探针分析表明,除主要（方铅矿、富铁闪锌矿）和次要（黄铁矿、毒砂、磁黄铁矿、黄铜矿等）硫化物外,硫盐毓硫物十分发育,主要有Ｃｕ－Ｓｂ－Ａｇ硫盐（黝铜矿、含银黝铜矿和银黝铜矿）、Ｓｂ－Ａｇ硫盐（深红银矿、辉锑银矿）、Ｐｂ－Ｓｂ硫盐（脆硫锑铅矿、硫锑铅矿）和Ｂｉ－Ｐｂ硫盐（斜方辉饿铅矿）。此外,尚有少（微）量黄锡矿、锡石、自然饿和银金矿等。银的硫盐硫物和硫化物（辉银矿）乃是获得银的主要工业矿物,这些硫盐毓矿物常与硫化物伴生,多沿方铅矿、富铁闪锌矿、黄铁矿等的解理、裂隙或粒间产出,这些研究结果不仅有助于了解矿化作用过程,而且为矿床评价,组分综合利用和选冶提供重要依据。     

我国首次发现的Cu6SnWS8矿

Ｃｕ６ＳｎＷＳ８矿是一种罕见矿物，在我国属首次发现，该矿物平均化学成分为：Ｃｕ４０．１９％，Ｓ ２６．２３％，Ｗ ２０．０２％，Ｓｎ １３．４９。本文就目前所获得的成果，介绍一下它的地质产状，伴生矿物及矿物的物理、化学特征。     

一种未知矿物的发现

本文旨在报道一个尚未定名的未知矿物。该矿物发现于四川耗牛坪稀土矿区。矿物具六方或三方对称，已变生为非晶态，电子探针波谱分析表明其物质组成配比没有对应的已知矿物。可能晶体化学式为ＡＢＯ「ＳｉＯ４」，Ａ＝Ｃａ、Ｂａ、Ｎａ、Ｃｅ、Ｐｂ、Ｕ等大阳离子组，Ｂ＝Ｔｉ，Ｆｅ、Ｎａ等小阳离子组。     

砷铜矾的发现与研究

砷铜矾（Ｐａｍａｕｉｔｅ）在１９７８年首次发现于美国，１９８４年笔者在广西德保矿区也发现了这种矿物，笔者发现在这种矿物有两种形态，即纤维状和薄片状。纤维状砷铜矾的化学成分为（％）：ＣｕＯ５８．６９，Ａｓ２Ｏ５１７．４１，ＳＯ３６．５４，ＦｅＯ０．８６，ＳｉＯ２０．０８，（Ｈ２Ｏ１７．７０），其理想分子式为：Ｃｕ９（ＡｓＯ４）２（ＳＯ４）（ＯＨ）１０．７Ｈ２Ｏ，与美国产出的砷铜矾的化学成分基本一致，     

氯铜矿矿物特征及在找矿中的作用

氯铜矿是由其他铜矿物氧化而成的表生矿物,常与赤铜矿、铜兰、褐铁矿等共生,是野外寻找铜矿化体的标志矿物之一.本文对土屋铜矿中的氯铜矿矿物特征及其在找矿中的标志作用进行了论述. 1 矿床地质特征 土屋铜矿床位于塔里木板块与准噶尔板块碰撞对接缝合带北侧的觉洛塔克晚古生代火山岛弧火山岩中,其成因为与斜长花岗斑岩有关的斑岩型铜矿,赋矿岩石为含铜石英岩、斜长花岗斑岩、中基性火山-次火山岩.该矿床蚀变类型齐全,分带明显,主要有硅化、青磐岩化等.矿石矿物为黄铁矿、斑铜矿、辉铜矿、氯铜矿、方铅矿、闪锌矿、辉铜矿等.脉石矿物主要…     

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