西太平洋区域二甲硫酸及其他硫化物的模拟研究

本文利用一维光化学模式，以二甲硫醚（ＤｉｍｅｔｈｙｌＳｕｌｆｉｄｅ，简称ＤＭＳ）为源模拟了西太平洋对流层的硫化物循环。ＤＭＳ海－气通量由“ｓｔａｇｎａｎｔ－ｆｉｌｍ”模式进行计算。尽管海洋大气中ＯＣＳ浓度比ＤＭＳ大一个量级，但它对ＳＯ２的贡献很小，ＤＭＳ仍是海洋大气中ＳＯ２的主要源。在大气垂直湍流输送过程中，ＤＭＳ白天与ＯＨ反应，夜间与ＮＯ３反应被氧化成ＳＯ２，ＳＯ２大部分通过非均相转化形成Ｈ２ＳＯ４。模拟结果与ＰＥＭ－ＷＥＳＴ－Ａ观测资料对比，取得了较好的一致性。     

The Dynamical Influence of Land－Sea Contrast and Sea Surface Temperature on Intraseasonal Oscillation in Tropical Atmosphere

An equatorial β-plane model which includes realistic non-uniform land-sea contrast and the underlying surface temperature distribution is used to simulate the 30-60 day oscillation (LFO) processes in tropical atmosphere, with emphasis on its longitude-dependent evolution and convective seesaw between Indian and the western Pacific oceans.The model simulated the twice-amplification of the disturbances over Indian and the western Pacific oceans while they are travelling eastward. It reproduced the dipole structure caused by the out-of-phase oscillation of the active centres in these two areas and the periodical transition between the phases of LFO. It is suggested that the convective seesaw is the result of interaction of the internal dynamics of tropical atmosphere with the zonally non-uniform thermal forcing from underlying surface. The convective activities are suppressed over Indonesia mari-time continents whilst they are favoured over the Indian Ocean and western Pacific warm waters, so there formed two active oscillation centres. The feedback of convection with large-scale flow slows down the propagation of disturb-ances when they are intensifying over these two areas, therefore they manifest a kind of quasi-stationary component to favor the ‘dipole’ structure. Whereas the disturbances weaken and speed up over the eastern Pacific cold water re-gion due to the interaction of sensible heating and evaporation with perturbational wind. Therefore the two major centers just show out-of-phase oscillation during onecycle around the latitudinal beltBy introducing the SST anomalies in El Ni?o and La Ni?a years into the surface temperature, we also show that they have significant influence on LFO processes. In an anomalously warm year, the LFO disturbances dissipate more slowly over the central-eastern Pacific region and can travel farther eastward; whilst in an anomalously cold year, the opposite is true.     

人工触发闪电与降雨倾泻

根据人工触发阀电后雨量猛增的观测事实，利用一个简单的静电模式计算了闪道附近雨滴的重力碰并增长，结果指出，闪电后降雨猛增必须满足一定的条件，除了要求较高的离子浓度（〉１０＾１４／ｍ＾３）外，还取决于闪电所引起的电场变化和闪电被触发后闪道附近环境电场强度的特性。     

用数字云图确定热带气旋强度的人－机对话系统

使用２４４６张卫星展宽云图资料样本，根据云系结构（眼，中心密蔽云区、螺旋云带，结构紧密度）和热带气旋强度的密切相关，求出回归方程、作为估计热带气旋强度的基本公式，并在计算机上实现，建立了确定热带气旋强度的人－机对话系统。经过业务试运行。获得了满意的结果。     

Geology and Genesis of the Mafic—Ultramafic Complexes in the Huangshan—Jingerquan（HJ） Belt,East Xinjiang

More than twenty mafic-ultramafic complexes, which host several mediumor large-sized Cu−Ni deposits, occur along the Huangshan-Jingerquan (HJ) belt in East Xinjiang. Rock types in these complexes are predominated by peridotite, pyroxene peridotite, olivine pyroxenite, gabbronorite, orthopyroxene gabbro, troctolite, gabbro and diorite. The ultramafic rocks are relatively Fe-enriched and are characterized by an assemblage of olivine+orthopyroxene+clinopyroxene+hornblende±plagioclase without obvious metamorphic textures. Chemically, these complexes are relatively Fe-enriched and show a tholeiitic trend of evolution. The complexes in this belt are intruded under the extensional environment in a Mid-Carboniferous back-arc basin. They can be considered as a new type of mafic-ultramafic complexes in orogenic belts, as designated by the name of the East-Xinjiang-type complexes. This project was financially supported by the National Natural Science Foundation of China.     

The Material Sourece of a New Type of Copper Deposits—Evidence from Stable Isotopes

The new type of copper deposits concerned with in this paper are vein copper deposits found in the Lanping-Simao Rift Basin, Yunnan,China. As is indicated by H,O,C,S,Pb and Sr isotopes, water and mineralizers in the ore-forming fluids were derived from heated meteoric water and mantle, respectively.The metallic elements(Cu,Ag,Pb,Zn,As,Sb,Fe,REE,etc.)are characterized by a mixed source from the crust and the mantle.     

Stratigraphic Geochemistry of Upper—Middle Proterozoic Suberathem in Northern Guangxi,China

The Upper-Middle Proterozoic epimetamorphic rock series in northern Guangxi is a suite of volcanic-terrigenous clastic formations transforming in facies from mobile to stable, which is similar to Eparchean normal argillo-arenaceous sediments both in petrochemistry and in REE geochemistry.The Upper-Middle Proterozoic Suberathem in northern Guangxi is characterized by primordial enrichment of As and Sb, significant depletion in Sr and Hg, bimodal or polymodal distribution of Au and other ore-forming elements, and high variation coefficients and strong mobilities of Sn,Cu,Ni,Au,Ag,As and Sb.The trace element association is characterized by the predominance of siderophile and chalcophile elements occurring in the Middle Proterozoic and that of lithophile ele-ments occurring in the Upper Proterozoic .It is suggested that in northern Guangxi is developed a series of ore-bearing formations with the Sibao Group as the protogenous basement and the Danzhou Group and Lower Sinian series as the derivative cap strata.     

汉源唐家铅锌矿床同位素地球化学特征及地质意义

唐家铅锌矿床赋矿层位是上震旦统灯影组，矿体受构造控制．根据同位素地球化学研究，矿石中硫主要来自围岩地层，成矿介质以循环地下热卤水为主．成矿模式年龄小于赋矿层位年龄．是一典型的沉机－热液改造型铅锌矿床．     

黄河兰州谷地新构造运动的初步研究

通过分析新构造运动在黄河兰州谷地的表现,证明自上新世末以来本区新构造运动强烈,相继发生过3次主要构造事件,制约和影响黄河兰州谷地的形成、发育及环境演变。新构造运动以脉动式整体抬升和差异式断块运动的方式活动,使本区自2.4Ma以来上升约800m。由于特定的地貌位置和特殊的区域地质构造,本区新构造运动完全受制于青藏高原阶段性强烈隆起。     

福建漳州复式岩体磁铁矿的成因矿物学特征

漳州花岗岩岩基共分两期七次(Ⅰ-Ⅶ)侵入,是中国东南沿海燕山晚期有代表性的大型复式岩体。笔者对区内各类花岗岩磁铁矿作了较深入的矿物学工作,包括晶出产状、晶体形态、X射线衍射、红外谱学、化学成分及稀土元素地球化学等方面的研究。本文重点论述磁铁矿的标型特征及成因意义,并提出区分不同成因花岗岩类岩石磁铁矿矿物学的判别标志,结合副矿物组合及岩石化学特点,对区内早、晚两期花岗岩类的成因分别判别为I型和A型花岗岩。