赣南鹅婆岩体地质特征及演化程序

在１∶５万黄石幅区调中,遵循单元—超单元的填图方法,对鹅婆岩体进行全面研究。在此基础上,阐述了鹅婆岩体的地质特征,并对其演化历程进行了初步探讨。     

永泰地区早白垩世深成岩体的划分及形成环境

永泰序列系复式深成岩体，由4个深成岩体、48个侵入体组成。按岩石谱系单位可划分为3个单元、2个独立单元及若干个亚单元。其形成时代为早白垩世，属同熔型花岗岩类。岩体受北北西向及北东东向断裂控制，为拉张环境下被动就位。     

米家山隆滑构造的发现及地质意义(摘要)

米家山隆滑构造的发现及地质意义（摘要）冯秦阳（甘肃省地勘局区调队兰州７３００５０）米家山隆—滑构造由米家山序列深成岩体和早奥陶世阴沟群变质岩系组成，出露于１∶５万老龙湾幅和赵家水幅相邻的部位，深成岩体呈椭圆形东西向展布，产于米家山背形褶皱的核部。岩体...     

带状深成岩体的某些地质地球化学特征—以日本和美国加州南部岩体为例

介绍了日本和太平洋对岸的美国加州南部的带状花岗岩质深成岩体的地质地球化学特征，对研究包括我国沿海地区在内的环太平洋带的带状深成岩体有重要参考价值。     

福建德化上涌地区中生代复式深成杂岩体特征

福建德化上涌地区中生代复式深成杂岩体是由印支期、燕山期两个构造岩浆旋回所形成的不同组合类型的深成岩体组成。岩石类型以钾长花岗岩为主，二长花岗岩次之。共圈定深成岩体3个，独立侵入体2个，共12个单元，归并为3个超单元和1个序列。通过调查认为上涌地区中生代侵入岩浆以同熔型为主，基本查明中三叠世复式岩体为挤压环境下的主动就位，而晚侏罗世－早白垩世则主要为拉张环境下的被动就位。并认为寿宁一华安火山基底断隆带中断印支期伸展－滑脱构造、燕山期断隆带的形成均与中生代岩浆上侵就位密切相关。     

加拿大苏必利尔省太古宙麻粒岩地体的构造环境

该文对加拿大苏必利尔省的火山—深成岩地体、变沉积岩地体和高级片麻岩地体的特征及其形成构造环境做了详细论述。     

应用花岗岩类谱系单位填图方法应注意的几个问题

结合野外实际资料,笔者就花岗岩类谱系单位填图方法能否以岩石结构演化特征为基础建立S型花岗岩的谱系单位,深成岩体间的接触关系类型能否作为划分花岗岩等级体制的标志进行了分析讨论,认为不同深成岩体之间的固结作用时间差仅仅是影响岩石结构变化及深成岩体间接触关系类型的因素之一,更主要的影响因素是与深成岩体形成时的物理化学环境(温度、压力、挥发组分的多寡)以及围岩介质的湿冷度、岩浆上侵规模的大小等有关.因此,S型花岗岩序列内部从早单元到晚单元岩石结构可以出现由粗粒结构→细粒结构演化的现象,同一超单元内部也可以出现超动型接触关系.另外,文中还对与火山岩关系密切的高位深成岩体能否单独建立谱系单位及混合岩浆成因的花岗岩可否利用同源岩浆演化理论建立谱系单位等问题进行了探讨.认为该方法尚有不妥之处,在具体使用过程中应加以注意.     

河北省锥子山复式深成杂岩体的解体及单元一序列划分

锥子山复式深成杂岩体由７个复杂深成岩体组成。无论在宏观上，还是在岩化上均具有可分性。共解体出１２４个侵入体，归并为２４个单元，建立了７个序列。它不是海西末期侵入的与康保－赤峰深断裂有关的花岗岩体，而是早侏罗－早白垩世所形成的与上黄旗－乌龙沟深断裂有关的杂岩体。解决了过去一直存有争议的期次划分、时代归属问题。     

小秦岭中生代花岗岩岩性带特征及岩石谱系单位划分

小秦岭中生代花岗岩是由老牛山、华山、闵峪等岩体组成的复式深成岩体。岩体内发育多类型岩性带,表明具有多期次熔融分异、侵位的演化规律,具成分和结构演化序列。通过岩性、成分、结构构造和接触关系、时空位态研究,进行了岩石谱系单位划分,建立了华山超单元组合。提出基本岩序是花岗岩区地质填图中最基本的观察和描述性单位,是谱系单位划分的基础。     

内蒙古巴彦琥硕-幸福之路地区花岗岩类岩石学特征

本文是在巴彦琥硕幅、幸福之路幅1:5万区调工作基础上,试用花岗岩单元—超单元填图理论,吸收湖南地调所花岗岩填图经验,对该区巴彦琥硕复式岩体、幸福之路复式岩体进行划分,建立了巴彦琥硕序列。在此基础上讨论其岩石学、岩石化学、稀土及微量元素地球化学等特征。     

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