南秦岭迷坝岩体的地球化学特征及其地质意义

目的 揭示南秦岭勉略带北部迷坝岩体的地球化学特征及其地质意义。方法 利用元素地球化学资料，结合岩体地质和岩相学特征进行研究。结果 岩体相对富集大离子亲石元素和轻稀土元素，亏损高场强元素，K2O Na2O和Sr含量及Zr／Y值较高；岩体具后碰撞高钾钙碱性花岗岩的特征；岩体是由二元岩浆尚未彻底混合而形成的。结论 指示晚三叠世秦岭造山带华北与扬子板块碰撞造山作用已进入到后碰撞演化阶段。     

辽南梁屯-矿洞沟古元古代岩体LA-ICP-MS锆石U-Pb年龄及岩石地球化学特征

辽南梁屯-矿洞沟古元古代岩体包括坎子岩体、卧龙泉岩体、学校后街岩体与梁屯岩体,岩性分别为中细粒二长花岗岩、中细粒似斑状黑云母二长花岗岩、细粒黑云母二长花岗岩、细粒正长岩。学校后街岩体与梁屯岩体LA-ICP-MS锆石U-Pb年龄加权平均值为1 887.2±5.4 Ma、1 883.9±2.6 Ma,为古元古代。从坎子岩体到梁屯岩体岩石化学体现了一个偏铝-过铝型,钙碱性-碱性的演化序列,K及Mg O含量逐渐增高,富集大离子亲石元素K、Rb、Ba、Sr,亏损高场强元素Nb、Ta、Zr、Hf,稀土元素配分模式右倾,属具有负铕异常的轻稀土富集、重稀土亏损型。结合相关构造环境分析,古元古代岩体在辽河岩群沉积完成后存在着一个活动大陆边缘-碰撞造山-造山晚期,岩石类型由I型-S型-A型的演化过程。     

川西扎瓦拉花岗岩锆石U-Pb年代学与地球化学特征及其地质意义

扎瓦拉岩体是川西藏东地区江达花岗岩带冬普-罗麦亚带花岗岩的重要组成部分,岩性组合为:石英二长岩→花岗闪长岩→二长花岗岩.研究表明:扎瓦拉岩体的石英二长岩和钾长花岗岩的LA-MCICP-MS锆石U-Pb年龄分别为(225.4±1.1)Ma和(218.0±1.1)Ma,时代属晚三叠世卡尼期,该岩石具有高硅、钛、钙,贫铝、镁、钠,相对富钾贫钠、准铝质等特征,为富钾钙碱性系列花岗岩.岩石的稀土总量偏高,轻稀土明显富集,弱负Eu异常;富集Rb、Ba、Th、U等大离子亲石元素,亏损Nb、Ta、P、Ti等高场强元素,表现出火山弧花岗岩的地球化学特征.扎瓦拉岩体形成于造山期板块俯冲碰撞型火山弧环境,岩浆可能源于岛弧不成熟陆壳的部分熔融,并混有部分幔源组分,属于早晚三叠世,金沙江洋壳向西俯冲,发生弧-陆碰撞造山作用的产物.     

贺兰山地区黄旗口花岗岩体地质特征、成因类型与构造环境探讨

贺兰山地区黄旗口花岗岩体呈岩基状产出,岩体具不甚明显的岩相分带现象.岩石类型复杂,以黑云母英云闪长岩、二云母英云闪长岩为主,二云母花岗岩、二云母二长花岗岩次之,蚀变较强烈.岩石化学成分总体呈中酸性,岩浆分异强烈.化学类型属钙性一钙碱性岩系,具壳源型（S）花岗岩特征.综合分析表明,贺兰山地区黄旗口花岗岩体成因类型属S型花岗岩,形成于大陆碰撞造山环境,具有汇聚、离散、扩张的强力就位特点,形成时代厘定为中元古代长城纪（晋宁期）.     

内蒙古阿巴嘎旗北部侵入岩体地质地球化学特征及成因

内蒙古阿巴嘎旗北部位于西伯利亚板块东南大陆边缘晚古生代陆缘增生带,地处二连—贺根山板块对接带的西北侧.通过对三类侵入岩体样品主微量元素地球化学特征的分析,结果显示正长花岗岩体(包括中细粒正长花岗岩、条纹正长花岗岩、钠长正长花岗岩)和碱长花岗岩体(中粗粒钠闪正长花岗岩、钠闪条纹正长花岗岩)都具有A型花岗岩的特征,碎裂岩化花岗斑岩岩体兼具A型和S型花岗岩的特征.三类侵入岩体岩浆成因与陆壳变杂砂岩部分熔融有关,均产于后造山构造环境.     

内蒙古林西三叠纪花岗岩中黑云母地球化学特征及成岩意义

关于内蒙古林西地区早中生代岩浆岩产出的构造背景尚有争议。作者选择林西地区早三叠世新林镇花岗闪长岩和晚三叠世四力本黑云母花岗岩为研究对象,在岩相学研究的基础上,利用电子探针对花岗岩中黑云母的化学成分进行分析,探讨岩石成因和成岩大地构造背景。研究表明:新林镇花岗闪长岩中的黑云母为镁质黑云母,四力本黑云母花岗岩中的黑云母为铁叶黑云母,总体均显示富铁(TFeO质量分数为22.81%~36.65%)、贫镁(MgO质量分数为2.44%~10.56%)的特征。新林镇花岗闪长岩成岩温度为785~805℃,压力为5.39~8.88MPa,lgfO_2为-13.2~-13.8,属造山带钙碱性花岗岩;岩浆物质以壳源为主,兼具幔源特征,形成于早三叠世碰撞造山阶段。四力本黑云母花岗岩成岩温度为690~710℃,lgfO_2为-16.3~-17.1,为非造山带碱性花岗岩;花岗岩的物源以壳源为主,形成于晚三叠世造山期后的演化阶段。早三叠世林西地区处于强烈的接触碰撞阶段,在晚三叠世则进入造山期后的伸展演化阶段。     

甘肃中祁连冬草沟花岗岩基岩石地球化学特征

冬草沟花岗岩基位于中祁连西段,属于加里东中期构造岩浆旋回的组成部分。本文通过对该岩基岩石地球化学特征进行研究,结果显示岩体中大离子亲石元素Ba、Th、Rb含量较高,K2O、Ba、Th、Rb等不相容元素强烈富集,Ce具正异常;岩体中稀土总量均变化较大,轻稀土较富集,呈减少趋势演化,重稀土含量变化较大,具弱负铕或正铕异常。通过构造环境判别,该岩体属岛弧钙碱性花岗岩类(KCG),为板块俯冲之产物,其形成于陆缘岛弧环境。     

准噶尔盆地阿克巴斯陶岩体地球化学特征及构造意义

探讨新疆准噶尔盆地阿克巴斯陶岩体的成因,从地球化学方向对区域构造环境与构造特征进行约束。野外勘查以及年代学、岩相学、地球化学特征分析,显示该岩体形成于晚石炭世莫斯科期。岩石类型主要有花岗斑岩和花岗闪长岩。花岗斑岩为硅质含量高的弱过铝质碱性花岗岩,高场强元素Zr、Th、Hf等相对富集,大离子亲石元素Ba、Sr、Nb、Ti等亏损,构造背景判别结果为典型的铝质造山期后A型花岗岩。花岗闪长岩为过铝质钙碱性花岗岩,Ce、Ba、Sr等元素较花岗斑岩富集,高场强元素Nb、Ta、P、Ti等及部分重稀土元素明显亏损,为典型的I型花岗岩,形成于活动大陆边缘。     

大别造山带新县岩体的锆石U-Pb年龄及其地质意义

出露于大别造山带西部的新县岩体主要侵位于大别杂岩和卢镇关群斜长角闪片麻岩之中.采用锆石La-ICPMS U-Pb定年方法,获得该岩体的主体岩性钾长花岗岩的岩浆锆石年龄为134.3±1.4 Ma,该年龄代表岩体的结晶年龄.综合分析表明,岩体中各类岩石的形成顺序依次为灰黑色中粒辉长闪长岩→灰色中细粒黑云母花岗岩→肉红色粗粒钾长花岗岩→黑云母辉长闪长岩脉、闪长玢岩脉和肉红色花岗斑岩脉.岩体中主体岩性钾长花岗岩的侵位可能预示着大别造山带早白垩世造山过程的即将结束,板内时期的即将来临;黑云母辉长闪长岩脉的侵入可能预示着大别造山带造山过程已经结束,非造山过程已经开始.     

湖南加里东期花岗岩成因及铀成矿关系

华南出露大量加里东期花岗岩,其岩石成因、构造背景长期存在争议。湖南省加里东期花岗岩年代学和地球化学数据显示,其主要形成于416～432 Ma之间,岩性主要为花岗岩和花岗闪长岩。岩石类型除少数为I型花岗岩外,大部分为S型花岗岩。地球化学特征为富硅、过铝质和高钾钙碱性系列花岗岩,富集Rb、Th、U等元素,亏损Ba、Nb、Sr等元素;指示岩浆源区为古-中元古代地壳物质部分熔融的产物,部分花岗岩有幔源物质的加入。区域地质背景和岩石地球化学数据指示湖南加里东期岩体形成于碰撞挤压峰期之后挤压减弱、应力松弛的后碰撞构造环境。区域内加里东期花岗岩中铀含量相对较高,为后期铀成矿提供物质来源。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that