苏鲁造山带岩浆岩的锆石U Pb定年及构造意义

锆石U-Pb定年和地球化学分析结果显示,苏鲁造山带南缘连云港锦屏山片麻状花岗岩形成于(806.0±14.0)Ma,海州群云台组变质火山岩形成于(800.8±7.8)Ma,张八岭隆起的张八岭群西冷组变质火山岩形成于(751.6±7.1)Ma和(767.0±15.0)Ma.这些岩浆岩总体上具有高钾钙碱性系列、右倾型REE(Rare Earth Elements)模式、Nb、Ta、Sr、P和Ti强烈亏损、中等负铕异常、重稀土弱到中等亏损、低Sr、高Yb等特点,与浙闽型岩浆岩反映的区域伸展环境和下地壳部分熔融是一致的.这次构造岩浆活动820～740Ma,是晋宁期主碰撞造山后Rodinia超大陆裂解和岩石圈减薄演化的记录.     

大容山-十万大山花岗岩带中A型紫苏花岗岩、麻粒岩包体的发现及意义

桂东南大容山-十万大山花岗岩带南部发现的紫苏花岗岩体及其中的大量基性麻粒岩、片麻岩包体的研究表明,麻粒岩包体普遍发育等温减压后成合晶变质结构,其主要变质反应为：Ga Sill→Spl Q;Ga Q→Opx Crd和Gt Sill Q→Crd,显示麻粒岩经历了快速抬升揭顶作用。基性麻粒岩中锆石主要由内核和外壳组成,内核以变质结晶特征为主,外壳为岩浆结晶特征,内核变质结晶年龄集中分布于(950-1100)Ma,外壳岩浆结晶年龄为248Ma,而紫苏花岗岩的Sm—Nd矿物一岩石等时线年龄为202Ma,并具有典型A型花岗岩岩石化学特征,标志着印支期造山作用的结束。据此,提出桂东南印支期A型紫苏花岗岩的源岩为中元古末四堡期造山事件(格林威尔)形成的麻粒岩相变质岩,印支期碰撞造山后的快速抬升伸展揭顶部分熔融作用形成了A型紫苏花岗岩,这为华南中元古末四堡期(格林威尔)江山-绍兴造山带的南延和晚古生代特提斯造山带的东延,以及印支期造山作用的结束提供了重要证据。     

吉林中部地区小绥河组变质粉砂岩碎屑锆石U-Pb年代学研究及其地质意义

对吉林省中部地区小绥河组变质粉砂岩进行了LA-ICP-MS碎屑锆石U-Pb年代学、地球化学及锆石Hf同位素的研究,探讨了变质粉砂岩的形成时代、物源及构造背景。通过U-Pb定年分析,获得小绥河组变质粉砂岩碎屑锆石3组U-Pb年龄:459～474Ma、441～446Ma和417～426Ma,其形成时代应为晚志留世—早泥盆世。通过全岩地球化学和锆石Hf同位素分析,认为小绥河组变质粉砂岩原岩物源主要来自于兴蒙造山带东段中奥陶世至早泥盆世的火成岩。小绥河组变质粉砂岩可能形成于弧陆碰撞的造山环境。     

秦岭西坝花岗岩LA-ICP-MS 锆石 U-Pb 年代学及其地质意义

西坝花岗岩位于南秦岭构造带陕西境内, 主要由花岗闪长岩、二长花岗岩和英云闪长岩组成。LA-ICP-MS 锆石U-Pb 原位同位素定年结果表明, 西坝岩体侵位于印支期, 由二长花岗岩样品(XB01-2)得到了219±1 Ma的年龄, 花岗闪长岩样品(XB06-1) 给出的年龄是218±1 Ma, 二者在误差范围内一致, 约218Ma代表了西坝花岗岩体的成岩时代。西坝岩体的年龄结合区域构造背景以及前人研究的地球化学特征, 说明它可能是秦岭主造山期岩浆活动的产物。     

四川盆地西部上三叠统须家河组物质来源：碎屑锆石LA-ICP-MS U-Pb年龄研究

对四川盆地西部晚三叠世须三期须家河组碎屑长石石英砂岩和须四期砂岩中碎屑锆石进行了U-Pb定年。分析研究表明:1川西西部都江堰地区沉积物样品具四个主要年龄峰分别为245 Ma、460 Ma、773 Ma和1 836 Ma;川西北部广元地区样品具四个主要年龄峰分别为245 Ma、452 Ma、834 Ma和1 850 Ma;2结合碎屑锆石U-Pb测年特征,表明川西盆地北段广元地区和中段都江堰地区须家河组上部和下部年代学以及地球化学信息一致,主要显示吕梁期(峰值1 836 Ma、1 950 Ma和1 850 Ma),晋宁末期(峰值为865 Ma和834 Ma),加里东期(峰值为460 Ma和452 Ma)和海西-印支期年龄峰(峰值为245Ma),反映两个地区具有相似物源;3结合碎屑锆石U-Pb年龄与周源造山带对比分析,海西-印支期碎屑物质来源于秦岭造山带;加里东期是秦岭造山带的主要造山阶段,秦岭造山带为该阶段提供物源;晋宁末期是扬子克拉通岩浆活动最活跃时期,扬子克拉通为该阶段碎屑物质主要源区;吕梁期碎屑锆石,主要来自其北缘的华北克拉通。     

西藏冈底斯西部地区花岗岩锆石U-Pb年龄及其地质意义

对西藏冈底斯西部措勤县打加错地区粗粒二长花岗岩、中粒二长花岗岩、花岗岩进行LA-ICP-MS锆石U-Pb法定年、锆石同位素组成、主量元素测定,获得年龄值分别为(43.5±1.5)Ma、(44.2±2.6)Ma及(44.2±1.7)Ma,结合区域岩浆侵位规律,根据侵入岩地质特征、岩石学、同位素年代学、岩石化学等特征,将研究区出露的花岗岩划分为喜山早期侵入岩,属冈底斯-念青唐古拉中酸性杂岩带南亚带重要组成部分之一。其物质来源与上地壳变质泥岩的部分熔融有关,所形成的构造环境与区域构造背景息息相关,是始新世末喜马拉雅陆块同冈底斯陆块碰撞,陆-陆碰撞造山结束后相对松弛阶段的产物,构造环境同碰撞花岗岩。     

西昆仑北带早志留世构造作用及其区域地质意义

目的 探讨西昆仑北带的早古生代构造-热事件信息,为北昆仑的碰撞造山作用时限提供新的证据.方法 对原划为古元古界的埃连卡特群片麻岩中的白云母进行40 Ar/39 Ar 同位素地质年代学研究,并结合区域地质分析.结果 埃连卡特群片麻岩中白云母40 Ar/39 Ar 坪谱年龄和等时线年龄分别为434.9 Ma±4.6Ma,436.1 Ma±4.8 Ma.结论 早志留世的这次构造-热事件应该是库地-其曼于特新元古代-奥陶纪洋盆闭合之后中昆仑地块与塔里木地块之间的碰撞造山作用.     

龙门山造山带轿子顶新元古代花岗岩锆石SHRIMP U-Pb年龄及其构造意义

目的 对扬子地块西北缘后龙门山地区轿子顶穹窿构造核部的花岗岩类进行年代学研究.方法 利用锆石SHRIMP U-Pb年代学对其形成时代进行约束.结果 轿子顶花岗岩体中变形花岗岩和块状花岗岩中锆石均发育岩浆韵律环带结构,具有较高的Th/U比值(0.52～1.23、O.32～1.16),为岩浆成因锆石.对变形花岗岩和块状花岗岩中岩浆锆石的SHRIMP U-Pb定年结果分别为793±11Ma和792±11Ma,表明它们的形成时代完全一致,均为新元古代晚期南华纪早期.结论 轿子项岩体具有后碰撞岩浆活动特征,是新元古代扬子地块西北缘活动大陆边缘俯冲以及弧陆碰撞造山作用导致的地壳增厚下地壳部分熔融的产物,形成于同碰撞(挤压环境)向碰撞后(伸展环境)转化阶段,即后造山期,是Rodinia 超大陆初始裂解阶段产物.     

宗务隆构造带西段物质组成及演化特征

为查明宗务隆构造带西段物质组成、变形特征及演化特征,运用野外地质剖面测制、岩石组合分析、LA-ICP-MS锆石U-Pb同位素定年等手段进行了调查研究,认为宗务隆裂谷带是在初始小洋盆或有限小洋盆的基础上发展起来的,是基于南祁连陆块与欧龙布鲁克陆块之间的前寒武纪结晶基底和早古生代加里东褶皱基底的基础上经历了陆内拉张、有限洋盆发育、俯冲—碰撞和碰撞后推覆造山等过程演化而发展起来的华力西—印支期造山带。研究结果为宗务隆构造带西段物质组成及演化特征提供了理论依据。     

东秦岭-大别造山带南缘印支期以来构造层序耦合特征分析

通过对东秦岭-大别山造山带南缘鄂东地区、荆当盆地、秭归盆地和川东北地区三叠纪-古近纪的构造层序对比研究,划分出三个大的构造层序,并分析了中上扬子地区印支期以来沉积盆地性质转换和迁移过程与构造层序的耦合关系,揭示了东秦岭-大别造山与成盆作用过程.认为早三叠世至中三叠世构造层序Ⅰ记录了扬子地台由克拉通盆地逐渐萎缩的过程,反映了印支期华北板块与扬子板块之间软碰撞未造山的过程;晚三叠世至早白垩世构造层序Ⅱ记录了前陆盆地的三次幕式演化过程,反映了早燕山期华北板块与扬子板块之间呈斜向、剪刀式由东向西陆-陆碰撞关闭以及前展逆冲叠置造山作用过程,与江南逆冲带联合作用形成前陆盆地沉降和沉积中心向西的迁移.晚白垩世至古近纪区域构造背景发生重大变化,构造层序Ⅲ记录了晚燕山期地壳快速均衡隆升,伸展断陷盆地形成演化过程.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-