诸广山复式岩体铀成矿特征及成矿规律初探

诸广山复式岩体位于湖南、江西、广东三省交界区,地处南岭纬向构造带、诸广山南北向构造带、九岭—万洋山华夏系复式隆起带的复合部位,受郯庐断裂系遂川—热水走滑断裂带控制,区内塘湾断裂及一系列北西向断裂带发育,构成有利的成矿构造结,其中发现多个大型、超大型的铀矿田和铀矿床,其铀矿化受多因素控制,以构造、围岩和岩浆—热液活动为主,在时间上、空间上具有独特的展布规律。从复式岩体的构造、围岩、岩浆—热液的特征入手,总结区内铀成矿特征及成矿规律,对区内下步寻找更多的富大型铀矿田和矿床有一定现实意义。     

内蒙古阿拉善右旗新井地区铀矿地质特征及控矿因素探讨

新井铀矿点是北大山地区已发现的重要铀矿点之一。在总结区域地质背景基础上,从新井地区铀矿地质特征入手,详细阐述了新井地区含铀建造、区域构造、围岩蚀变、矿体及矿石特征等,认为铀矿化位于断裂构造交叉部位的地层弧形拐弯地段,多期次、长期活动的断裂构造对铀成矿有利;古元古代浅变质片岩为有利的含铀建造,在浅变质片岩与富铀的伟晶状花岗岩接触带上矿化显示好;区内岩浆活动频繁,呈多期次产出,铀偏向于最晚期岩浆活动形成的酸性伟晶状花岗岩中富集成矿,多期、多次性岩浆活动对铀成矿有利;区内后期热液蚀变改造类型多样,蚀变较强部位铀矿化显示好。综合分析认为,区域性断裂带、古元古代浅变质片岩与富铀的伟晶状花岗岩接触带及热液蚀变带是新井地区铀成矿的有利空间,同时指明了下一步找矿的方向。     

302矿床围岩蚀变与铀矿化的关系

储广山花岗岩体受郯庐断裂系遂川——热水走滑断裂带控制,区内塘湾断裂及一系列北西向断裂带发育,构成有利的成矿构造结,其中发现多个大型、超大型的铀矿田和铀矿床,其铀矿化受多因素控制,以构造、围岩和岩浆-热液活动为主,在时间上、空间上具有独特的展布规律,通过对该矿床的岩石、构造、矿体和围岩蚀变特征的分析,探讨了围岩蚀变与铀矿成矿的关系,为同类地区的找矿提供了依据.     

满洲里小尖山地区火山岩浆活动与铀矿化的关系

在前人研究的基础上,通过对研究区铀矿化及异常的详细解剖、总结及测试数据的综合分析,系统研究了该区铀矿化类型,探讨了中生代火山岩浆活动与铀成矿的关系。将区内铀矿化划分为白音高老型(火山岩型)和花岗斑岩型(次火山斑岩型)两种类型;中晚侏罗世的火山岩浆活动为本区成矿作用提供了部分铀源和热源,早白垩世是铀矿化形成的主要时期,早期的火山事件与早白垩世花岗质岩浆事件应是同一期构造-岩浆热事件的产物。小尖山地区的主要含矿层为白音高老组的凝灰岩、熔结凝灰岩、角砾熔岩及鱼脊山岩体晚期的花岗斑岩;花岗斑岩型铀矿化受断裂-火山构造及潜火山岩控制,主要产于石英二长斑岩与花岗斑岩内外接触带。综合分析认为该区具有较好的铀成矿潜力。     

甘肃磨子坝地区铀矿化特征及找矿方向

中川岩体位于中秦岭华力西褶皱系礼县-柞水冒地槽褶皱带西段中部,为同心环状产出的复式岩体。区内构造形迹复杂,岩浆活动频繁,热液活动和围岩蚀变强烈。岩体内具多期次岩浆活动与铀矿化关系密切,控制了7902铀矿床、磨子坝(216)铀矿点的分布。铀矿化主要有硅质脉型,黏土型及二者迭加型。成矿作用是多元的,中低温热液是基础,后来经过改造和淋积迭加成矿。矿体严格受构造控制,赋存于不同级别的北北东向构造内,并处于构造的变异部位和次级构造发育处。     

粤北白水寨地区铀矿找矿潜力分析

粤北下庄矿田位于南岭纬向构造带第二亚带中段的大东山—贵东花岗岩带东部,其大地构造位置处于华夏古陆西缘及闽赣后加里东隆起西南缘与湘、桂、粤北海西—印支坳陷的复合部位,铀成矿地质条件优越,是我国花岗岩型铀矿集区之一。本文通过对含矿岩性、控矿断裂以及放射性物化探等资料综合分析,结合近年来钻探成果,表明白水寨地区铀矿化严格受蚀变碎裂岩带及其上、下盘附近的蚀变碎裂花岗岩,以及花岗岩小岩体内、外接触带控制;认为区内岩浆活动多期多阶段、富铀热液活动多期次、含矿断裂构造带发育和围岩蚀变强烈,具备了铀成矿有利的地质条件,是下庄矿田内进一步开展铀矿找矿潜力较大的重要地区之一。     

浅析二连盆地铀矿地质特征及成矿机制

本文以盆地构造演化及沉积建造分析,研究了盆地差异升降,铀活化迁移,揭示了二连盆地含铀矿层及铀矿的分布规律与定位条件。对二连盆地地区铀矿化特征及成矿条件进行了初步分析。     

赣杭铀成矿带主要地质特征与成矿规律研究的主要进展和存在的主要问题

赣杭铀成矿带位于中国东南部,在中生代时期发生过多期构造和岩浆活动,从而发育了大规模铀成矿作用,形成了区域上北东向构造的与沉积-火山岩有关的铀成矿带。在该成矿带中,分布有相山、盛源、新路、大洲四个主要含铀火山盆地。近些年勘察结果表明,赣杭铀成矿带中的热液型铀矿对火山岩系的地质时代、火山岩的岩相以及火山岩的岩性没有选择性,但与特定时期的碱性火山作用关系密切。但早期铀矿化可能与早白垩世早期碱性岩浆作用有关,晚期铀矿化可能与早白垩世晚期或晚白垩世早期的碱性岩浆作用有关。     

青海东昆中岩浆弧带侵入岩体中金矿床地质特征及成因探讨

近年来青海东昆仑成矿带发现了新的金成矿类型,金矿体主要赋存于东昆中岩浆弧带中酸性侵入岩体内的构造蚀变破碎带中。为了查明此类金矿床的成因,从矿床形成的地质特征、矿体特征及矿体与构造、岩浆活动的关系等方面进行分析,说明金矿体的容矿围岩为华力西期、印支期闪长岩、花岗闪长岩和花岗岩,北西向和北东向断裂为主要的控矿、容矿构造,成矿流体沿断裂带的裂隙系统中运移至减压部位成矿,在脆性剪切部位形成构造蚀变岩型金矿体。矿体成因属于构造蚀变岩型,具有较大的找矿空间。     

黄岛地区北西向断裂特征及构造物理模拟实验

选取黄岛地区北西向断裂为研究对象,通过区域野外地质踏勘系统研究了区内北西向断裂特征,并对典型断裂建立了地质模型。在此基础上,基于相似性原理,首次在研究区运用构造物理模拟实验方法对晚侏罗世-早始新世北西向断裂的发育演化进行反演恢复,取得了与实际地质情况较高的吻合度,为其形成机制研究提供了有力的实际变形支持。构造物理模拟结果显示,黄岛地区北西向断裂的发育演化经历了晚侏罗世-早白垩世早期、早白垩世中晚期-晚白垩世和古新世-早始新世3个阶段,构造应力场强度经历了较强—强—弱的演化过程。其中,早白垩世中晚期-晚白垩世是研究区大规模北东-南西向伸展的时期,北西向断裂多形成于此阶段。形成机制上,黄岛地区北西向断裂与晚侏罗世以来中国东部构造应力场的发展演化存在密切的成生关系,其动力来源主要受控于太平洋板块俯冲及郯庐断裂带、沧东-兰聊断裂带的走滑活动等关键因素。     

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.     

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。     

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.     

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.