矿区尺度的品位-吨位模型研究探讨——以崤山金矿区为例

矿床品位-吨位模型属于矿床统计模型,是矿产资源潜力评价的重要组成部分。依据河南省陕县金矿储量核查成果数据,选取崤山金矿区为研究对象,利用SPSS软件及Excel对全矿区75个金矿矿体块段品位、吨位数据进行频率分布分析与处理,然后进行P-P图及Q-Q图正态检验,建立了矿体块段品位模型、吨位模型、品位-吨位联合模型。总结了崤山金矿区矿体块段品位及吨位分布的典型数学地质特征,并探讨了品位-吨位模型在该矿区资源预测评价中的作用,为今后矿区的地质工作提供指导。     

扬子陆块震旦—寒武系磷矿成矿区带划分和找矿远景

扬子陆块区磷矿资源丰富,矿产勘查和科研资料积累较多,其中新元古界震旦系—下古生界寒武系海沉积型磷块岩矿床地质研究和勘查工作较为深入。通过研究,在扬子陆块区震旦系—寒武系磷矿厘定出4个Ⅲ级成矿区带,12个Ⅳ级成矿亚带。扬子陆块区磷矿资源潜力巨大,根据成矿条件及找矿潜力分析,在区内圈定重要找矿远景区25个,并划分A、B、C级。研究成果可为扬子陆块区磷矿勘查部署和规划提供依据。     

梅树村剖面研究的回顾与展望

云南晋宁梅树村剖面是我国下寒武统梅树村阶及震旦系——寒武系界线层型剖面,也是全球前寒武系——寒武系界线层型剖面和界线点的中国候选剖面。该剖面位于昆阳磷矿区,北距昆明市区65公里。该区是我国研究震且系——寒武系界线的重要地点之一。早在1939年,程裕祺首次发现中邑村磷矿,并在磷矿层中观察到“类似三叶虫活动颊”的生物化石     

中国铜镍资源储量-品位分布特征的研究

文章研究了国内全部铜、镍矿区的储量和品位数据,首次提出应以矿区的矿石类型为储量和品位的统计单元,论述了铜、镍资源储量在不同品位区间的分布特征.     

湖北省钟祥市莲花山磷矿地质特征及找矿远景

提要莲花山磷矿赋存于震旦系下统陡山陀阶,有Ph1和Ph3磷矿层发育,共划定4个矿体,最大矿体长2500m,宽1700～ 2800m,矿体平均厚度4.68m,矿石P2O5平均品位21.12％.矿石类型主要为胶状泥晶结构和粒屑结构条带状磷块岩.矿床成因为海相沉积,磷矿沉积范围广、连续性好、相对稳定,在矿区的西部和矿区的东南...     

云南永善县金沙厂磷矿地质特征及成因浅析

永善金沙厂磷矿矿床产于寒武系下统梅树村组中谊村段含磷岩系中,磷基粗砂屑磷块岩及云基细砂屑磷块呈互层状。矿区为近东西向短轴背斜,核部为上震旦统灯影组,下寒武统梅树村组含磷岩层围绕核部分布,背斜核部断裂南侧为金沙逆断层,北侧为正断层,东西两侧为正断层。为磷矿层生成后构造,矿层在断层下盘连续分布。本文着重详细论述矿区地质特征、矿床特征及矿石特征。进一步探讨其矿床成因。     

陕西沉积型磷矿成矿特征及找矿潜力

陕西沉积型磷矿主要分布在华北陆块西南缘、秦祁昆造山系南缘及华南陆块北缘,赋矿地层主要为震旦系、寒武系。通过总结省内景福山式、胡家沟式、天台山式等5个类型磷矿成矿时代、含磷岩系地层、岩石组合、矿石类型的成矿地质特征,划分了沉积型磷矿成矿远景区,分析了找矿潜力,对寻找新的磷矿产地应具有一定的指导意义。     

一种含硫酸根的磷铝石变种——硫磷铝石(Sulfate-Variscite)

硫磷铝石产于巴音郭楞蒙古自治州尉犁县木穷库都克沉积型磷矿氧化带中,该矿物为次生淋滤产物。沉积型磷矿层位于寒武系下统西大山组下部磋质岩中。矿层下伏岩层为震旦系上统汗戈尔乔克组的灰色冰积砾岩,矿层被西大山组上部含泥砂质灰岩、炭质泥岩、泥质粉砂岩中的燧石层所覆盖。矿区为一向斜构造,北翼矿层出露完全,南翼缺     

云南镇雄县羊场磷矿地质特征及沉积环境浅析

云南镇雄县羊场磷矿为隐伏矿赋存于寒武系下统梅树村组(∈₁ms)中。矿石工业类型简单,以碳酸盐型为主,次为硅质及硅酸盐型。整个矿区位于扬子陆块南部碳酸盐台地,织金聚磷盆地北西段之次级坳陷盆地内,属浅水陆棚-潮坪环境下海相沉积型中磷矿床。     

瓮安磷矿白岩矿区王家院矿段地质特征

王家院矿段是一个矿体较稳定、连续,厚度较大,矿石质量较好的大型海相磷 块岩矿床。矿段位于白岩背斜西翼,磷矿层主要赋存在震旦系陡山坡组第四段,矿体呈层状产出。 矿石自然类型较多,但矿石中矿物共生组合简单,矿石中_2PO_5含量地表比深部要富集。 矿床是在干燥炎热的热带、亚热带气候下,多源含磷物质的化学方式为主沉积在具障壁岛的 半封闭滨海潮间带中向陆一侧海水中。 瓮安磷矿白岩矿区是贵州规模较大的磷矿区之一,王家院矿段则是瓮安磷矿白岩矿区中露采、交通等条件较好的矿段之一。     

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.)