安徽沙溪式斑岩铜(金)矿床地质地球化学特征及成因分析

沙溪斑岩铜(金)矿床位于庐枞火山岩盆地西北外围,处于郯庐断裂带内部.矿体主要产于燕山期的石英闪长斑岩,次为黑云母石英闪长斑岩中.主要成矿期为岩浆期后热液期.蚀变分带自内向外:钠-更长石化带—硬石膏-黑云母-钾硅酸盐化带—钾硅酸盐青磐岩化叠加带—石英绢云母化带—青磐岩化带,主要工业矿体位于钾硅酸盐化带及其外侧.文章总结沙溪式斑岩铜(金)矿床地质地球化学特征,并对该类型铜(金)矿床的成因进行了探讨.     

云南中甸普朗斑岩铜矿成因探讨

普朗斑岩铜矿位于义敦岛弧带南段,产于印支-燕山早期普朗复式斑(玢)岩中。主要岩性由石英闪长玢岩、石英二长斑岩和花岗闪长斑岩组成,岩石化学和地球化学特征显示为碱性岩石系列I型花岗岩。成矿流体具高盐度和成矿温度150～300℃变化。硫同位素δ34SCDT为-2.23‰～3.75‰,来源于深源岩浆。矿床的构造作用、液压致裂作用和蚀变脉体形成等成矿机理经历了一个复杂过程。成岩和成矿作用的时间大致为235～206Ma,具多阶段性,其中石英-辉钼成矿阶段为(213±3.8)Ma,成岩和成矿时代主体为印支期。矿床蚀变由中心向外依次为硅化钾化带—绢英岩化带—青磐岩(角岩)化带的面型蚀变特征。成因类型属岛孤斑岩型铜矿床。     

新疆富蕴县希勒库都克铜钼矿床地质特征

希勒库都克铜钼矿体严格受斑岩体(石英斑岩和花岗闪长斑岩)控制。矿石具细脉状、浸染状构造,金属矿物主要为辉钼矿、黄铜矿和黄铁矿以及少量的磁铁矿、白铁矿。蚀变主要为硅化、钾化、绿帘石化、黄铁矿化、高岭土化、绿泥石化、绢云母化、碳酸盐化等。其成矿地质背景与世界巨型斑岩铜矿十分相似,展示了良好的找矿前景。     

青海哈日扎含铜斑岩特征及其找矿潜力分析

通过对青海哈日扎含铜斑岩特征、岩石地球化学特征以及成岩、成矿环境的分析,探明哈日扎含铜斑岩由蚀变花岗闪长斑岩组成,属高钾钙碱性岩石类型,具幔源岩浆底侵下地壳熔融的成岩特征。含铜斑岩体具强烈高岭土化、石英绢云母化。矿体产出在高岭土化带和石英绢云母化带的接合部,其特征与德兴、玉龙等典型斑岩型铜矿床蚀变、赋存部位等特征相似,具有很好的成岩成矿环境和找矿前景。     

宁芜盆地白象山铁矿床地质特征及成因分析

白象山式铁矿床位于宁芜中生代断陷盆地南段,属于宁芜地区玢岩型铁矿中凤凰山式铁矿床.该矿床的主矿体呈似层状,产于闪长岩体和黄马青组砂页岩接触带部位.赋矿围岩发生强烈的角岩化、钠长石化、金云母化、黑云母化、碳酸盐化,矿石矿物主要为磁铁矿、假象赤铁矿、菱铁矿,脉石矿物主要有钠长石、石榴子石、阳起石、磷灰石、金云母、石英、碳酸...     

中建金矿地质特征及找矿前景浅析

海南省屯昌县中建金矿区位于琼中隆起北侧,昌江-南吕深大断裂与屯昌断裂交切部位之东侧,屯昌岩体与琼中岩体之外接触带之中。矿区南北长7km,东西宽2km范围内,含金石英脉和含金硅化破碎带共有28条。近矿围岩蚀变有硅化,绢云母化、黄铁矿化、黄铁绢英岩化、绿泥石化等。矿体与闪长岩脉密切关联。矿床类型为石英脉型和石英硅化破碎带型。     

广东省大宝山斑岩型钼矿床围岩蚀变特征

大宝山斑岩型钼矿床发生了强烈的围岩蚀变,与钼矿床有关的典型蚀变以面型为主,局部迭加带状蚀变。蚀变类型有:钾长石-黑云母化、石英-绢云母化(石英-白云母化)、伊利石-水白云母化(粘土化)、绿泥石-绿帘石碳酸盐化(青盘岩化)、水黑云母化、黄铁矿化等。各种类型互相过渡,互相迭加,呈现了多期多阶段的蚀变特征,而钼矿化的富集在空间上与石英绢云母化带吻合。     

西藏谢通门县雄村铜(金)矿蚀变特征及成因探讨

西藏谢通门县雄村铜(金)矿是新发现的位于冈底斯中段的大型铜(金)矿床.其矿化围绕含眼球状石英斑晶的角闪石石英闪长玢岩及其环带状蚀变带分布.薄片研究表明:矿体由内至外主要发育钾硅酸盐化、强烈硅化、绢云母红柱石次生石英岩化和黄铁绢英岩化蚀变,形成了大范围的矿化.雄村铜(金)矿与矿区北西向构造带上多处矿体的特征相似,为一由角闪石石英闪长玢岩杂岩体侵入而形成的斑岩型铜(金)矿床.     

甘肃省文县何家湾金矿地质特征及矿床成因浅析

何家湾金矿属碧口-阳坝元古宙华力西-印支期铜金(钴)成矿带,赋存于长城系碧口群阳坝组绿片岩地层中,产出于北东向断裂带中,矿体规模较小,品位高,矿石类型为黄铁矿化石英脉型,围岩蚀变主要为褐铁矿化、黄铁矿化、绢云母化、硅化;该矿床属中低温热液含金石英脉型矿床。     

天水市响潭沟金矿地质特征及成因探讨

西秦岭响潭沟金矿床赋存于印支期柴家庄单元天子山二长花岗岩体中,受闪长玢岩脉及北东向断裂F2、F8双重控制。矿体主要产于闪长玢岩脉的下部的断裂破碎带中,具"上脉下体"的二元空间结构。矿石以浸染状、细脉-浸染状构造为主,同时具有面状蚀变矿物分带特点。具典型的斑岩型金矿床特征。     

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.     

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.     

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.     

A computer generator for randomly layered structures

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

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.     

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.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

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.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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