西部大开发与广西矿业发展

矿业是广西国民经济的支柱产业 ,在西部大开发中 ,必须认清矿业发展面临的形势 ,研究对策 ,才能作出新贡献。     

西秦岭北缘活断层带断层气的基本特征

通过对西秦岭北缘活断层带断层气活动基本特征的研究认为：本活断层带是本区地球排气的主要通道;在走滑断层拉分区,地球排放气体活动的强度与地震活动有密切的关系;本带东段断层排气活动比较强,西段断层排气活动比较北,并讨论了两形成差异的原因。     

云南孟连中缅边境Ms7.3地震前滇西实验场的重力变化

１９９５年７月１２日,在云南省西南部的孟连县以西中缅边境发生了一次Ｍｓ７．３强烈地震。震前,距震中２８０ｋｍ以远的滇西实验场重力网红河断裂以西出现了重力异常,平均变化幅值达７０×１０＾－８ｍｓ＾－１,最大变化幅值达１１４×１０＾－８ｍｓ＾－２,云南省地震工程研究所测量队重力组根据上述重力异常变化,对此次地震作了较好的中短期预测预报。     

喜马拉雅山中部地区强震活动特征的初步研究

喜马拉雅山中部地区（北纬２８°—３８°、东经８０°—９０°）位于青藏高原中北部的高海拔地区,地震活动十分强烈,根据现有的地震资料：研究区内的８次７级地震是成组的且基本对称的分布于研究区中,形成了以聂拉木８级强烈地震为柄,以近南北的主压应力方向为轴的扇形,扇面的中间所发生的地震其震级小于７级,７级以上的地震分布在扇面的边缘。而且８次７级强烈地震成对分组,各组间时间间隔基本相对集中。     

北喜马拉雅地区三叠纪地层划分

北喜马拉雅地区的三叠纪地层发育完整,层序清楚、构造简单、未变质,可分为土隆群、曲龙共巴组与德日荣组３个岩石地层单位,其中生物化石丰富,属典型的特提斯动物群。该地层主要出露于亚东、定结、定日、聂拉木土隆、普兰、札达马阳一带,呈东西向带状展布,在我国境内延伸达１５００ｋｍ以上,与印度库蒙（Ｋｕｍａｕｎ）地区的三叠纪地层（由下而上为：Ｃｈｏｃｏｌａｔｅｓｅｒｉｅｓ,Ｋａｌａ－ｐａｎｉＬｉｍｅｓｔｏｎｅ,ＫｕｔｉＳｈａｌｅ,ＫｉｏｔｏＬｉｍｅｓｔｏｎｅ）可以进行对比。     

西天山金、铜矿地质特征简述

西天山是我国古生代造山带重要的金、铜矿成矿单元之一,具有Au、Cu地球化学场.各种地球物理场也显示具有良好的金、铜矿成矿地质背景.金、铜矿主要生成于海西期的构造岩浆地质热事件中,形成了浅成低温热液型和韧性剪切带型金矿以及海底火山喷气热水沉积型、矽卡岩型、斑岩型、陆相火山热液充填型铜矿.可划分出赛里木铜金成矿带、吐拉苏也里莫墩金成矿带、察布查尔铜成矿带及胜利达坂金成矿带.主要矿床有阿希金矿、望峰金矿、喇嘛苏铜矿和预须开普台铜矿.     

湘西花垣—张家界逆冲断裂带地质特征及其控矿意义

湘西花垣－张家界断裂带显逆冲压扭性、与其分枝断裂古丈－张家界断裂带关系密切,平面上在张家界市后坪复合、具有类似的地质特征。形成时代较古丈－张家界断裂带晚,时间上有先后及生成关系,向上呈叠瓦状、深部收敛在一起。具有明显的控矿作用。     

PDO对西太平洋副热带高压年代际东退的可能贡献

以往的研究已证实,西太平洋副热带高压(副高)在1970s后期减弱东退.基于大气模式(CAM4)的理想型海温强迫试验,结果表明:副高的东退可能是大气对于正位相太平洋年代际振荡(PDO)的相应.伴随着PDO转变为正位相,西太平洋至印度半岛以及热带东太平洋的对流加热增强,大气表现为Gill型响应,在亚洲大陆至西太平洋上空低层产生气旋性异常,有利于副高东退.同时,高层产生反气旋异常,使得东亚西风急流加强和向南扩展,进而调节西太平洋上空的次级环流,进一步有利于副高东退.     

Dissipation process of summer tropical easterly waves in Western North Pacific

Tropical easterly waves are common features in the trade wind zones and they are important sources of tropical cyclogenesis. Despite numerous studies have analyzed the genesis and maintenance of easterly waves in the Western North Pacific, few had examined their dissipation processes. Focusing on tropical easterly waves during May-September of 1979–2017, this study shows that most of the easterly waves (∼70 %) eventually dissipate when encountering the monsoon trough and associated westerlies, while 22 % were carried northward by the monsoonal southwesterly flows and became recurving disturbances. Less than 10 % of easterly waves propagate across the South China Sea against the prevailing monsoon westerlies and into the Indochina peninsula. The vorticity budget analysis illustrates that total vortex stretching in the lower troposphere is the key factor in propelling the small number of easterly waves westward, suggesting that stronger and more convectively active easterly waves tend to move further into the developed monsoon trough. This echoes the previous observation that tropical disturbances alone have a limited probability in developing into a typhoon, for those disturbances or easterly waves almost always need to interact with the monsoon trough or a monsoon gyre, as well as other intraseasonal features to sustain the organized convection and rotation.     

Movements of the Western Pacific Warm Pool Centroid and Their Relationship to Sea Surface Temperature Changes in Nifio Regions

By using monthly historical sea surface temperature (SST) data for the years from 1950 to 2000, the Western Pacific Warm Pool (WPWP) climatology and anomalies are studied in this paper. The analysis of WPWP centroid (WPWPC) movement anomalies and the Niño-3 region SST anomalies(SSTA) seems to reveal a close, linear relation between the zonal WPWPC and Niño-3 region SSTA, which suggests that a 9° anomaly of the zonal displacement from the climatological position of the WPWPC corresponds to about a l°C anomaly in the Niño-3 region area-mean SST. This study connects the WPWPC zonal displacement with the Niño-3 SSTA, and it may be helpful in better understanding the fact that the WPWP eastward extension is conducive to the Niño-3 region SST increase during an El Niño-Southern Oscillation (ENSO) event.