广西田林县八渡金矿地质矿化特征及成因研究

八渡金矿为一产于中生代燕山期侵入相辉绿岩体内的中小型矿床,发育主要矿脉三条,其空间产出严格受北东向断裂构造控制。矿化以硅化石英脉为主,次为硫化物-石英脉及褐铁矿型;矿区硫、氢、氧、铅同位素、岩石稀土元素地球化学特征及包体测温结果综合分析表明,其成因为与岩浆活动有关的中-低温热液金矿床。     

江西冷水斑岩型银铅锌矿床矿物的稳定同位素特征

江西贵溪冷水斑岩型Ag—Pb—Zn矿床产于晚侏罗世火山—侵入杂岩体中,矿化与次火山岩,主要是花岗斑岩的侵入有关.矿化和蚀变分带明显,自下而上依次出现铜矿化带、锌—铅矿化带和银矿化带以及相应的绿泥石化带,绢云母化带和碳酸盐化带,不同成矿阶段矿物的硫、碳、氧同位素组成有所不同。其变化具有较明显的规律. 矿区的铅同位素组成主要显示单阶段演化的特点,其成矿年龄约为100百万年,晚于火山—侵入杂岩体的形成(140百万年).早期矿化阶段成矿溶液的δ~(18)O_(H_2O)=9.90％,δ~(34)∑_s≈4‰,证明溶液中的水和硫主要来自岩浆。晚期成矿溶液δ~(18)O_(H_2O)为4.89‰,表明大气降水逐渐增加.矿物稳定同位素组成的规律性变化表明成矿溶液是向着温度逐渐降低,氧逸度逐渐升高和pH缓慢增加的方向演化的.     

云南都龙锡锌矿床中白钨矿微量元素及稀土元素地球化学

云南马关都龙Sn-Zn多金属矿床位于滇东南老君山锡锌钨多金属成矿区南部,是我国三大锡石硫化物矿床之一,近年来矿区外围西部-金石坡矿段的地质勘探与找矿,发现矿区深部燕山期隐伏花岗岩外接触带存在大量W(-Cu-Mo)矿化,呈细脉(网脉)状、星点状、团斑状产于碎裂状石榴石-透辉石夕卡岩、节理与裂隙发育的夕卡岩化大理岩及片岩和花岗岩顶部硅化壳接触带.研究表明,其中矿石矿物-白钨矿以富集Sn,Mo,Pb,Zn,Cu为特征,Sr和Ba相对富集,其稀土配分模式为中等向右倾斜曲线,这些微量元素富集与稀土元素元素组成特征与隐伏花岗岩基本一致,仅Eu正异常明显,可能是继承了花岗岩中长石类矿物的Eu正异常特征所致,W等成矿物质主要来源于深部燕山晚期隐伏花岗岩,其矿化应与深部隐伏花岗岩侵入活动过程中的结晶分异作用有关,该成矿阶段,成矿流体具有较高的温度和氧逸度.此外,从矿区深部(靠近隐伏岩体)至地表浅部,矿化类型(W-Fe-Cu-Mo-Sn→Sn-Zn)和夕卡岩类型(无水夕卡岩:石榴石化和透辉石→含水夕卡岩:绿泥石、阳起石、透闪石)均呈有规律变化,其垂直分带特征与典型夕卡岩型矿床较类似.因此,都龙Sn-Zn多金属矿床应属于与燕山晚期花岗岩有关的夕卡岩型多金属矿床,其中层状夕卡岩的形成应为成矿流体顺层交代的结果,矿化类型和围岩蚀变的差异与隐伏岩体距离和控矿构造有关.     

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。     

南岭地区脉型钨锡矿床构造控制规律探讨

南岭地区的脉型钨锡矿床几乎都与本区的燕山期花岗岩有密切的关系.燕山期花岗岩常以多阶段复式岩体产出,钨锡成矿主要与同期晚阶段侵入的小岩体有成因联系.本区北东向和东西向区域性大断裂控制着复式岩体的主要空间分布,其次级构造或派生构造则是控制晚阶段补充侵入的成矿花岗岩体定位的构造,也是控制矿田、矿床定位的构造.脉型钨锡矿床的成矿裂隙是控制矿田、矿床定位的断裂构造之次级裂隙和派生配套裂隙,其力学性质以剪切为主,兼具剪张或剪压复合的特征.它在成矿前、成矿期和成矿后的发展演化常表现出继承性活动的特点.在成矿期的继承性活动使裂隙多次张开充填成复脉.这也是矿床出现“王牌脉”的原因之一.     

白银厂矿田同位素特征及其流体成矿作用研究

白银厂矿田多金属硫化物矿床的石英包裹体水的δD水为-71‰～95‰，δ^18O水为-0．09‰～ 8．7‰，显示了岩浆水、大气降水、变质水的混合作用．含矿火山岩总硫δ^34S∑s( 3．68‰)指示硫主要为深部岩浆来源，并经历了陆壳硫的混染，矿石硫主要来源于围岩．含矿流纹岩中的铅为地幔和地壳的混合铅，矿石铅主要来自嗣岩的构造活化铅．这些同位素特征研究表明，白银厂矿田经历了两期成矿作用．早期为岩浆流体与大气降水混合成矿；晚期为构造流体与大气降水混合．对流循环成矿．     

广东省连平县大尖山铅锌矿床成因及围岩含矿性

贵东-大东山构造带南缘的压扭性断裂是大尖山铅锌矿床最主要的导矿、容矿构造,矿床产于断裂挤压破碎带内靠近上盘与英安斑岩的接触部位,是广东第二大铅锌矿床.通过对成矿时代、控矿构造、矿化特征、成矿温度及成矿物质来源的分析研究,初步证明该矿床成因属中温岩浆热液充填破碎带型;在分析研究了围岩含矿性的基础上,总结出矿区围岩对成矿的贡献流纹斑岩＞英安斑岩＞中基性岩脉＞变质石英砂岩＞中粒黑云母花岗岩.     

江西永丰南坑萤石矿床稀土元素地球化学特征研究

江西省永丰县南坑萤石矿是产于花岗岩断裂破碎带中的典型脉状萤石矿床。稀土元素地球化学特征表明矿体的围岩——花岗岩具有明显的负E_u见异常。萤石矿石轻重稀土分馏强烈,轻稀土高度富集,E_u、C_e亏损不明显。萤石的成矿过程是一个中偏弱碱性条件(PH值6.85—8左右);成矿温度为90℃—350℃,最佳值150℃—160℃;从T_b/Ca—T_b/La图解(P·Moller等1976)可以看出矿床属热液成因,与萤石包裹体中测试的δDH_2O、δ~(18)OH_2O对同位素组成分别为-51.2‰——-57.4‰、-3.7‰——-8.6‰所解释的热液成因(与大气降水关系密切)基本结论一致。∑REE的低含量并参考萤石中较低的Sr含量(B·S·Panov等,1989),暗示了今后有希望在附近找到更晚期结晶的萤石矿脉,也为在深部找寻盲矿体提供了理论参考。     

河南省嵩县南沟金(萤石)矿床地质特征及找矿前景

南沟金(萤石)矿床位于华北板块南缘,秦岭造山带北秦岭构造亚东的东段,马超营区域性脆韧性断层的北侧.成矿受太古界太华群地层、基底背斜构造和断层(环形构造近EW向及NW向断裂构造)及燕山期晚期岩浆侵入活动作用等三重地质要素的控制.成矿物质来源多样,如燕山期晚期花岗岩体、太古界太华群地层.金矿石铅、硫同位素测试结果表明,成矿流体来自地壳深部或上地幔.该矿床大地构造成矿环境、赋矿围岩特征、控矿构造及岩浆岩条件等矿化特征均与造山型金矿相似,成矿作用多样(火山喷流沉积、变质作用改造,岩浆热液作用交代等),矿床成因为叠生复合造山型金(萤石)矿.     

青海查查香卡铀矿地质特征及控矿因素分析

查查香卡铀矿产于岩体外接触带滩间山群绿片岩相强烈变形岩石中,受北西西向韧-脆性剪切带控制,矿化岩石中穿插大量肉红色钾长石脉,赤铁矿化、黄铁矿化、碳酸盐化、硅化等近矿蚀变发育。岩、矿石主量元素分析表明铀矿化过程中Mg O,K2O,Fe2O3含量增高,Si O2含量减少。轻、重稀土元素强烈分馏,轻稀土富集,负铕异常明显。结合该矿地球化学分析结果,详细阐述了铀成矿地质特征,指出韧-脆性剪切带、滩间山群变质岩系、中酸性岩(脉)体"三位一体"成矿机制,构成该铀矿的三大主控矿因素。     

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.     

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.     

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.     

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.     

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.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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。     

A computer generator for randomly layered structures

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

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.     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.