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。     

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…     

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，     

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.     

General contents of JOURNAL OF PALAEOGEOGRAPHY,2014

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Clay Mineralogical and Geochemical Studies of Detrital Rocks of the Upper Cretaceous Salt-bearing Strata,Simao Basin,SW China:Implication for Provenance and Source Weathering

正1 Introduction Geological studies established on several sections in Lanping-Simao basin have shown that the salt-bearing strata of Mengyejing formation(Yunlong Fm.in Lanping basin)are constituted by an alternation of salt layers and interbedded facies.The latter consists mainly of mudstones,and mudstone-rich conglomerate.The mineralogy and geochemistry of salt-bearing beds and     

Status of China’s Mineral Resources in 2013

正On 22nd April 2014,with the approach of the 45th World Earth Day,China’s Ministry of Land and resources issued the status of China’s mineral resources in 2013.The first task of the prospecting breakthrough strategy action implemented in the last five years has been completed,and China’s security capacity for mineral resources has been significantly improved.In the     

Thermodynamics of the Calcium-Containing Brine Systems

正There are more than 700 salt lakes with area of more than 1km2 on the Qinghai-Tibet Plateau of China.In recent years,an oilfield brine was also found in the Nanyishan Section of Qaidam Basin in the Qinghai-Tibet     

Mechanism of Salt Migration Driven by Tectonic Processes:Insights from Physical and Numerical Modeling

正1 Introduction Physical and numerical models are constructed to investigate the evolution and mechanism of salt migration driven by tectonic processes.In recent years,we have designed and ran series of models to simulate salt     

Palynological Assemblage Age and Palaeoenvironment of the Cretaceous Salt-bearing Strata in Laos and Yunnan,China

正The study of Cretaceous-Palaeogene salt-bearing strata of the Khorat Basin Laos and the Lanping-Simao Basin in Yunnan,China has an great significance not only in explaining the basin evolution and the genesis of potash     

Geological Characteristics of Potassium-Bearing Salt Layers in the Well Block Quele of the Kuqa Depression and their Significance

正Potash is one of the long-term scare deposits in China,and potash prospecting has long been listed as a key brainstorm project for our nation and geological prospecting units.There have been considerable studies in search for potash deposits in the Kuqa depression of the Tarim basin(Jackson et al.,1991;Gemmer et al.,2004;Vendeville,2005;Vendeville and Jackson,1992a,1992b),     

Integration of Resources and Technological Advantages,Creation sustainable Qinghai Potash Fertilizer Industry Base

正1 Introduction Qaidam Basin in Qinghai,including 43 salt lakes with multiple dominant mineral such as potassium,magnesium,lithium etc.,is the most intensive distribution of Saline