胶东金矿成矿构造──地球化学动力学研究

通过对胶东区域断裂构造时空演化的分析，提出郯庐大断裂的次级断裂为胶东金矿的控矿构造，并为导矿构造。晚燕山期区域右行走滑断裂活动产生的浅部张剪裂隙为容矿构造，其张裂变形产生的扩容作用是“泵吸”深部矿液上侵充填的驱动力。张剪断裂以脉动方式释放构造应力，实测差应力值为１２０～４０ＭＰａ；从早到晚有衰减趋势。容矿断裂脉动活动可划分为脆性破裂和脆韧性扩张两种动力学状态或阶段，并制约着热液反应体系中成矿和控制反应进行的方向和强度，从而控制成矿元素的富集和分散。热液成矿反应体系的热力学演化与构造动力学条件的耦合是金富矿石形成的机制。     

植物在不同形态和不同状态下的荧光光谱特征研究

本文从光合作用的角度出发,讨论了植物叶片在不同形态、不同状态下的荧光光谱特征以及它们对荧光光谱的影响。文章涉及了以下几方面的内容:(1)植物在离体形态和活体形态下的荧光光谱特征;(2)叶片正面与反面的荧光光谱特征;(3)植物不同器官对荧光光谱的影响;(4)叶片放置时间对荧光光谱的影响;(5)叶片经不同处理时对荧光光谱的影响等。其目的是为激光荧光技术用于植被遥感的实施提供基础数据。     

浙江晚中生代雁荡山地貌成因及其与火山构造协同性演化规律

浙江雁荡山是东南沿海一座典型的晚中生代破火山，以发育丰富的白垩纪流纹质火山岩地貌为特色，主要包括火山岩相剖面和火山岩地貌两种类型地质遗迹。本次通过详细的野外地质调查、岩石学研究及遥感图像分析，进一步将其中火山岩相剖面划分为溢流相、基底涌流相、火山碎屑流相、空落相剖面地质遗迹四小类；火山岩地貌分为叠嶂、锐峰和岩洞地貌地质遗迹三小类，并综合分析了其分布规律与成因演化过程。研究表明这些地质遗迹的分布和演化明显受到火山构造与火山岩相的控制。另外，研究区显著发育3级夷平面，反映其至少经历过3期隆升- 剥蚀事件，是太平洋板块、菲律宾海板块与欧亚大陆板块相互作用的动力学过程及印度板块碰撞远程效应的综合影响结果，同时其也是研究流纹质火山岩地貌成因与演化过程的理想基地。     

Geology and isotopic composition of helium,neon, xenon and metallogenic age of the Jinding and Baiyangping ore deposits,northwest Yunnan,China

TheJindingoredeposit,locatedinthenorthwestYunnanProvince,isthelargestPb-Zndeposit(Pb Zn>15Mt1),averagingZn=6.08%andPb/Zn=1/4.7)inChinaatpresent.Toitsnorth,alargeCu-Co-AgdeposithasbeenfoundatBaiyangpingrecently1).TheJindingPb-Zndepositishostedinsandstonesa…     

山西义兴寨金矿床金矿物颗粒的产出及其成矿动力学意义

山西义兴寨金矿床的金主要呈包体金和裂隙金两种产出状态.文章根据成矿地球化学动力学理论,论证了金元素在含矿断裂发生脆性破裂和脆-韧性扩张活动中析出的化学反应类型,以及受反应动力学条件的制约,形成矿石中金不同产出状态的规律.指出热液矿床中普遍存在的包体金为热液成矿早期阶段断裂发生脆性破裂和成矿流体沸腾,导致快速反应结晶的产物;而裂隙金和晶隙金为成矿晚期金等矿质在流体中残余富集,同时成矿断裂再次发生脉动破裂,即成矿热力学演化与有利的构造动力学因素耦合作用的结果.得出金矿物颗粒的产出状态具有成矿动力学意义的结论.     

黄骅坳陷新近系馆陶组Ⅲ段辫状河相高分辨率层序分析

以高分辨率层序地层学理论为指导,以野外露头、钻井岩心、测井及地震资料的综合研究为基础,研究了黄骅坳陷新近系馆陶组Ⅲ段的高分辨率层序地层特征,识别出1个长期、两个中期和若干个短期基准面旋回层序。其中短期、中期旋回都可分为向上“变深”非对称型和向上“变深”复“变浅”对称型两类。深入探讨了不同结构类型和充填样式的各级次基准面旋回层序对储层的控制作用,认为储集砂体主要发育于长期及中期基准面旋回上升的早期。     

藏北沉鱼湖-向阳湖一带石坪顶组火山岩特征、形成时代及环境

沉鱼湖—向阳湖一带的石坪顶组火山岩大地构造位置属巴颜喀拉-可可西里地块和南部的若拉岗日裂谷带,岩石结构类型比较简单,以粗面安山岩为主,粗面岩、玄武粗安岩、粗面英安岩次之,以钾质太平洋型钙碱性系列为主.火山岩轻、重稀土分馏程度均较高,重稀土分馏程度比轻稀土稍低一些,具轻稀土富集,重稀土亏损的特点,时代属中新世.K2O/Na2O>1,说明成矿物质为深部幔源物质混合了壳源物质,属大陆板内造山晚期演化的火山岩类型.     

石河子绿洲空气湿度和降水的长期变化趋势分析

分析了石河子绿洲3个地面站(炮台、石河子和莫索湾)41a(1964～2004年)的温度、相对湿度和降水,发现随着石河子垦区绿洲面积的扩大以及新疆增温增湿的气候变化趋势,石河子绿洲也有其比较独特的区域气候特征。主要表现在:(1)41a来温度、降水量呈增加趋势,但空气湿度比较稳定,没有明显的变化;(2)石河子绿洲的温度、降水量以及空气湿度具有明显的季节变化特征。秋季的温度变幅最大,冬季最小。这与新疆大部分地区冬季增温幅度最大有所不同。空气相对湿度变化的季节差异不明显。(3)以莫索湾站代表绿洲边缘,石河子站代表绿洲区,其降水、温度和空气湿度变化有明显差异,显示了比较明显的绿洲“冷岛”和“湿岛”效应。     

新疆气象台站迁移及其对气候变化分析的影响

由于诸多原因,如城乡规划建设、外部环境遭受破坏和工作环境需要改善等,新疆现有105个国家基准气候站、国家基本气象站和一般气象站从1950年起到2004年,搬迁达73个站150次,占全区地面气象站总数的70%。气象台站搬迁在某种程度上会影响观测数据的连续性和一致性,特别对于气候变化分析工作,更要求数据的历史延续性。本文分析了新疆台站迁移状况以及台站迁移后对数据连续性的影响,为使用这些数据的研究人员分析研究新疆气候变化提供了很好的参考信息。     

DIAGNOSTIC INVESTIGATION OF SIMULATION BIAS WITH THE GRAPES-MESO MODEL FOR A TORRENTIAL RAIN CASE

In this paper, the numerical simulation bias of the non-hydrostatic version GRAPES-Meso (Mesoscale of the Global and Regional Assimilation and Prediction System) at the resolution of 0.18o for a torrential rain case, which happened in May 31st to June 1st 2005 over Hunan province, are diagnosed and investigated by using the radiosondes, intensive surface observation, and the operational global analysis data, and the sensitivity experimental results as well. It is shown in the result that the GRAPES-Meso could reproduce quite well the main features of large-cale circulation and the distribution of the accumulated 24h precipitation and the key locations of the torrential rainfall are captured reasonably well by the model. However, bias exist in the simulation of the mesoscale features of the torrential rain and details of the relevant systems, for example, the simulated rainfall that is too earlier in model integration and remarkable underprediction of the peak value of rainfall rates over the heaviest rainfall region, the weakness of the upper jet simulation and the overprediction of the south-west wind in the lower troposphere etc. The investigation reveals that the sources of the simulation bias are different. The erroneous model rainfall in the earlier integration stage over the heaviest rainfall region is induced by the model initial condition bias of the wind field at about 925hPa over the torrential rainfall region, where the bias grow rapidly and spread upward to about 600hPa level within the few hours into the integration and result in abnormal convergence of the wind and moisture, and thus the unreal rainfall over that region. The large bias on the simulated rainfall intensity over the heaviest rainfall region might be imputed to the following combined factors of (1) the simulation bias on the strength and detailed structures of the upper-level jet core which bring about significant underpredictions of the dynamic conditions (including upper-level divergence and the upward motion) for heavy rainfall due to unfavorable mesoscale vertical coupling between the strong upper-level divergence and lower-level convergence; and (2) the inefficient coupling of the cumulous parameterization scheme and the explicit moisture in the integration, which causes the failure of the explicit moisture scheme in generating grid-scale rainfall in a certain extent through inadequate convective adjustment and feedback to the grid-scale. In addition, the interaction of the combined two factors could form a negative feedback to the rainfall intensity simulation, and eventually lead to the obvious underprediction of the rainfall rate.