西秦岭华力西—印支期幕式裂陷活动初探

华力西—印支期，西秦岭受古特提斯洋的影响发育三期裂陷活动（１、泥盆纪；２、石炭纪；３、二叠至三叠纪），造成该区地层展布星条带状，深水沉积与浅水沉积相间，以及活动型海槽沉积与稳定型浅海沉积相间的格局，是加里东期之后秦岭构造带东西分异的主要原因．     

西秦岭海西-印支期裂陷活动及其与古特提斯的关系

海西-印支期，西秦岭地区受古特提斯洋的影响在前海西期变质基底之上发育三期裂陷活动（１．泥盆纪；２．石炭纪；３．二叠至三叠纪），造成该区地层展布呈条带状．深水沉积与浅水沉积相间，以及活动型海槽沉积与稳定型浅海沉积相间的格局．是加里东期之后秦岭构造带东西分异的主要原因。     

秦岭造山带泥盆纪三级构造热水沉积成矿盆地主控因素——大型——超大型矿床集中区研究（I）

从系统学和协同学角度研究分析了秦岭造山带泥盆纪三级构造热水沉积成矿盆地的主控因素。认为三级构造热水沉积成矿盆地是受诸多因素控制的一个构造--热水成岩成矿系统（一种非线性、自组织系统）。秦岭深部岩石圈地幔近南北向收缩与佛坪大陆热点构造（hotspot）的耦合，引发陆壳浅部发生近东西向伸展，触发热水（能）从深部向陆壳浅部大规模运移。近东西向高序次同生断裂控制一级沉积盆地的形成与演化。不同级次的同生断裂是控盆-成盆的主控因素，低序次NE向、NW向和SN向同生断裂是秦岭造山带泥盆纪三级构造热水沉积成矿盆地的主控因素，也是热水喷流进入盆地的构造通道。三级构造沉积盆地为热水成岩成矿系统发生大规模聚集成矿提供了构造空间。     

对西秦岭几个地质问题的探讨

华力西—印支期,西秦岭发育一个受控于古特提斯洋的坳拉槽,它是造成加里东期之后东西秦岭分异的主要原因并且控制了该阶段的成矿作用,西秦岭泥盆—三叠系既不是大洋沉积,也不完全是扬子北部大陆边缘沉积,而主要是叠加在扬子西北部早古生代被动大陆边缘之上的坳拉槽沉积。     

秦岭祁连山昆仑山构造发展史与南北中国板块的拼合

按秦岭祁连山昆仑山发展演化，中国大陆的形成可总结为3阶段板块拼贴“焊合”模型即：中元古代至新元古代早期，原始秦昆洋俯冲—消减，塔里木—华北古陆（北中国板块）与华南洋域新生陆壳（南中国板块）拼贴增生，形成原始中国古陆；震旦纪至志留纪，原始中国古陆裂解，秦祁海洋扩张—俯冲—消减，阿拉善—华北板块（北中国板块）与塔里木、柴达木、华南组成的联合板块（南中国板块）缝合统一，形成古中国板块，泥盆纪至三叠纪早期，古特提斯洋俯冲—消减，藏滇板块（基梅里大陆一部分）与古中国板块碰撞拼贴，滨邻古特提斯洋的中国大陆西南缘（秦祁昆地区）全面皱起，造就中国大陆轮廓；中生代以来，板内超长期继承性汇聚和滨西太平洋边缘构造带、新特提斯—喜马拉雅构造叠加、改造，造就现令中国大陆构造、地势。     

甘肃岷县寨上金矿地质特征及控矿因素

在表述寨上金矿成矿地质背景和矿床地质特征的基础上,研究控矿因素。对同成矿构造体系,昆仑-秦岭纬向构造体系的西秦岭东西向构造带的北西西向断裂构造为同成矿断裂构造。分析矿区北西西向同成矿断裂,总结断裂构造活动、成矿、控矿及其金矿的成矿和产出规律。     

热水沉积成矿盆地的热状态及热演化分析与研究思路——热水沉积 …

根据对秦岭泥盆地纪沉积盆地的构造成盆－后期构造变形特征研究,秦岭造山带泥盆纪热水沉积成矿盆地中构造－热流体地质事件可初步厘定如下：（１）中泥盆世伸展构造成盆－热水同生沉积成矿事件（Ｄ１）。（２）晚泥盆世－石炭纪伸展变形－深源热流体叠加事件（Ｄ２）。（３）印支期挤压收缩变形－热改造事件（Ｄ３）。（４）燕山期逆冲推覆构造改造－深源热流体加及脆性变形事伯（Ｄ４）。（５）喜玛拉雅山期胞性变形（Ｄ５）。从盆     

太行山西部寒武系超覆层序演化特征

太行山西部位于华北地台的中部地区，吕梁古陆控制了寒武纪地层的发展与演化。通过研究，本区可识别出５个沉积层序：层序１形成于早寒武世龙王庙期与毛庄期，时限约４Ｍａ；层序２形成于中寒武世徐庄期与张夏早期，时限约５Ｍａ；层序３形成于张夏中晚期，时限约６Ｍａ，层序４形成于晚寒武世崮山期至长山末期，时限约１０Ｍａ；层序５形成于凤山期，时限约５Ｍａ。层序１，２，４为１类沉积层序，底部有河流回春作用；层序３、５为Ⅱ类沉积层序。这５个沉积层序自东向西逐渐上超形成超覆层序，反映了碳酸盐台地的形成与发展的演化特征。     

西昆仑及邻区成矿规律和成矿系列

成矿系列是研究区域成矿规律的一种学术思想,主张用系统论、活动论的观点研究在地质历史发展的各阶段、各特定地质构造环境中成矿作用的过程及形成的矿床组合自然体。本文基于对西昆仑及邻区大地构造演化的新认识和新理解,结合研究区境内外地质和矿产勘查研究新进展,尤其是大批成矿年龄精测数据和对成岩成矿物质来源的新认识,将西昆仑及邻区内生金属矿产资源划分为8个主要矿床成矿系列：（1）古元古代鞍山式沉积变质型铁矿成矿系列;（2）中元古代层控碳酸盐岩型铁铜金矿床成矿系列;（3）志留纪沉积变质岩系有关的Fe矿床成矿系列;（4）晚泥盆世-早石炭世层控碳酸盐岩型铅锌（铜）矿床成矿系列;（5）石炭纪火山岩型块状硫化物铜矿床成矿系列;（6）晚石炭世层控碳酸盐岩型锰矿床成矿系列;（7）侏罗纪-白垩纪层控（MVT）和沉积喷流型（SEDEX）型铅锌矿床成矿系列;（8）中新生代与伟晶岩有关的稀有金属矿床成矿系列。叙述了各个成矿系列的成矿地质背景、成矿特征、矿床组合、时空分布规律和典型矿床特征等。本次成矿系列的划分,强调以重大构造事件作为背景,突出以重大构造事件与大规模成矿的耦合关系作为出发点,力求从更大尺度上认识矿床形成的成矿动力学背景。值得指出的是,研究区幅员辽阔,不少矿床的成矿系列具有明显空间递变性,如与特提斯洋闭合和碰撞有关的成矿事件横跨原特提斯-古特提斯和新特提斯阶段;北昆仑地体为塔里木古陆的一部分,记录从古元古代早期到新元古代的构造演化对Rodinia 超大陆汇聚和裂解的响应。在长期演化过程中,西昆仑及其邻区形成了独特的成矿系列。     

华北古大陆南缘的金属成矿作用

东秦岭大部分金属矿床集中分布于华北古大陆南部边缘，以陆缘构造发展阶段的赋矿沉积建造和岩石组合划分成矿系统；前长城纪陆核活动性边缘沉积成矿系统；中、新元古代被动大陆边缘成矿系统；早加里东期构造体制转换期成矿系统；中生代陆内碰撞造山成矿系统，按矿床形成作用方式可以划分为：（1）构造-岩浆-流体成矿作用，主要以洛南-栾川钼（钨）多金属斑岩组合成矿系统为主，成岩方式为壳幔同熔的燕山期中酸性岩浆的浅成侵入与定位；（2）构造-建造-流体成矿作用，按不同构造作用层次再细分为中深层次的构造作用（主要形成韧性剪切带型矿床）、浅层次构造作用（主要形成构造蚀变岩型矿床）。主要的成矿作用发生在燕山期。     

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.     

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.     

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