峨眉山柿子坪热田地下水碳氧同位素特征初步研究

在峨眉山柿子坪热田地质调查及热水勘探过程中 ,采用了碳、氧同位素地球化学方法 ,结果发现不同成因类型的地下水其碳、氧同位素组成特征各不相同 ,为查明地下热水的形成条件提供了重要依据 ,表明用地下水中 HCO-3 的碳、氧同位素组成来研究地下热水系的发育特征是有前景的     

570矿区的水-岩同位素相互作用

文章研究５７０矿区流纹岩和花岗斑岩的氧同位素分布规律，探讨了水－岩氧同位素相互作用的地质意义，用缓冲开放系统模式估计了水－岩相互作用的持续时间。     

新疆阿克提什坎成矿区热液体系氢氧同位素研究

成矿热液的氢、氧同位素组成与其水的类型，水／岩交换的岩石成分及同位素组成，水／岩交换时的温度及水／岩交换程度（Ｗ／Ｒ比值大小）等因素有关。应用水／岩交换理论，对新疆阿尔泰诺尔特地区阿克提什坎金－多金属成矿区成矿热液体系氢、氧同位素组成进行了研究，认为成矿热液早期既有岩浆水又有大气降水参与，随着温度降低（３３０℃→２００℃），大气降水比重逐渐增大，及至占主导地位。     

西藏尼木-那曲热水氘过量参数及其指示作用

利用热水的氘过量参数,探讨其在地热田勘探开发中的指示作用。选取西藏尼木-那曲未开发利用的11个地热田,其中吉达果、宁中、谷露和玉寨为重点研究地热田,分别收集了2011年氢氧同位素数据,2012年对重点地热田进行氢氧稳定同位素数据采集,收集了进行过系统研究的羊八井热田的相关数据进行对比研究。研究区内天然水受到同位素交换作用的影响,氘过量参数(d值)分布在-20‰~30‰,主要集中在0‰~10‰;从d值箱式图中不难发现玉寨、谷露热田受同位素交换作用明显,在图中表现为异常点;探讨了d值随区域分布、海拔高度、取样温度、氚的关系;通过对天然水氢氧稳定同位素及d值进行Q聚类分析,很好地识别了区内天然水明显的同位素交换作用,概述了区内高温热储特征:d值较小、滞留时间较长、热水温度高、出现明显的氧漂移等。通过综合分析并结合当地实际情况,确定宁中-谷露区热田、玉寨热田为进一步研究的重点区域,结合当地实际情况及地热开发利用条件与潜力分析,谷露地热田区进行高温地热发电的前景较好。     

浙江新昌硅化木的硅质来源

在浙江新昌早白垩世盆地西侧馆头组地层中存在丰富的硅化木。该地硅化木保留清晰的植物, 均由显微结晶质石英组成。从岩石学角度。它们属木化石硅质岩。硅化木的硅氧同位素组成δ^30Si值为－0．4‰--1.3‰δ^18O值为18．1‰-23.1‰。根据硅化木的硅，氧同位素组成及周围岩石的岩石化学成分，作者讨论了硅化木的硅质来源和成因，认为它们具有热水硅质岩的特点，系河湖水和海水向下渗透，并在一定深度内发生循环然后上涌，火山活动为热水提供热源，二氧化硅来源于热水流经的地层和岩石，富含二氧化硅的热水交代古树木形成硅化木。根据氧同位素地质温度计，计算出硅化木形成时的热温度为70．8－108．4℃。     

苏皖交界地区蛋白石硅岩热水沉积地球化学特征

产于凹凸棒石粘土矿层中的硅岩具有特征的沉积构造，ＳｉＯ２含量高（７７．９２～８９．４４％），Ｕ／Ｔｈ＞１、Ｚｎ、Ａｓ、Ｓｂ等元素含量高，稀土总量低（４．５×１０－６～１６．５５×１０－６）。稀土配分型式及氧稳定同位素组成与热水沉积硅岩一致，推算形成温度为７１℃～８１℃。上述特征表明硅岩为热水沉积产物，亦说明在苏皖凹凸棒石粘土矿床形成过程中存在有热水事件。     

福建平和大望山等铅、锌、银(金)矿床稳定同位素地球化学

对福建平和大望山等铅、锌、银(金)矿床的氧、氢、硫、铅稳定同位素分析测定结果,脉石矿物氧同位素δ~(18)O(‰)=+2.54～+10.05,其中包裹体氢同位素δD_(H_2O)(‰)=-46.6～-111.8矿石硫同位素δ~(34)Si(‰)=-3.60～+4.90,铅同位素~(206)Pb/~(204)Pb=18.3817～18.8747,~(207)Pb/~(204)Pb=15.5932～15.8328,~(206)Pb/~(204)Pb=38.5152～39.9802.据硫、铅同位素研究认为,矿质来自花岗闪长岩浆:氢、氧同位素研究认为,成矿溶液主要为演化的混合型初始岩浆水(MCIMW),局部有大气降水或演化的大气降水的混入,并讨论了水/岩作用以及矿床所在地区地质地球化学的某些特点。     

月山地区铜矿床氢、氧同位素地球化学研究

成矿热液的氢、氧同位素组成既取决于组成热液的不同成因介质水的初始氢、氧同位素组成．又受介质水演化过程中氢、氧向位素组成变化的影响。本文通过月山地区铜矿床成矿热液氢、氧同位素组成五种演化机理的讨论．构筑了成矿热液的δ１８Ｏ－δＤ综合模式图．并确定了铜矿床成矿热液的来源。     

浅析松辽盆地英台断陷深层天然气气源对比

目前，在英台断陷南部洼陷和北部洼陷已经各有五口井获得高产气流。为了弄清英台断陷烃类气与烃源岩之间的亲缘关系．在确定天然气组分的基础上，有针对性地挑选了大量的样品做稳定碳同位素分析，本文利用稳定碳同位素这种较为可靠的气源对比方法对英台断陷的烃类气与烃源岩做了气源对比分析，通过分析得出两个主要结论：第一个结论是英台断陷南北洼陷的烷烃碳同位素值存在明显差异，这说明南北洼陷的烷烃来自于不同的烃源岩，南部洼陷的烃类气的部分碳同位素发生倒转现象，这应该是不同成因气混合造成的；第二个结论是南部洼陷的气源岩是南部洼陷内发育的暗色泥岩，而北部洼陷的气源岩则是北部洼陷内发育的暗色泥岩。     

陕西银洞子矿床热水沉积环境演化特征

银铜子银铅多金属矿床为一热水沉积矿床，后期改造作用很弱，基本完整地保存了原始热水沉积特征。与热水喷溢作用脉动性活动规律相应，金属矿物集合体条带和纹层、矿化强度在纵向上的变化具有以矿体为中心的对称性特点。热水带来的元素钠、氯表现为以矿体为中心的低－高－低趋势；陆源物质（粘土矿物）的铝和海水来源的钾、镁则表现为以矿体为中心的高－低－高趋势。（Fe Mn)/Ti比值也具有低－高－低变化趋势；岩矿石微量元素和硫同位素以及成矿介质标志在空间上也具有类似的变化特征。这些晕圈式变化特征，与热水活动规律一致。     

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.     

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.     

A computer generator for randomly layered structures

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

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。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

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

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.