TWO SUITES OF OPHIOLITE RECOGNIZED IN THE MAQEN AREA, NORTHEASTERN TIBETAN PLATEAU

TWO SUITES OF OPHIOLITE RECOGNIZED IN THE MAQEN AREA, NORTHEASTERN TIBETAN PLATEAU1　JiangCF ,YangJS ,FengBG ,etal.OpeningandClosingTectonicsofKunlunMountains.Beijing :GeologicalPublishingHouse (inChinese) ,1992 . 2　XuZQ ,YangJS ,LiHB ,etal.TheA’nyemaqenSutureBeltandtheDynamicsinSubductionandCollision .TheStudyoftheOphioliteandGeodynamics[M ].(inChinese) .1996 .185～ 189. 3　YangJS ,XuZQ .TheA’nyemaqenOphioliteBeltEastKunlunMts.,NWChi…     

华南金矿二元混合成矿模式

根据华南六个有代表性金矿的成矿时代、断裂构造、围岩、侵入岩、中基性岩墙、成矿类型、成矿阶段，矿石组成、成矿温度、包裹体成分以及稳定同位素等多方面研究，发现华南大部分金矿具有共同特征；主要成矿时代为燕山期，远落后于围岩时代；是沿地壳级大断裂形成的后生矿床，六个金矿的铅同位素组成可分出高值区（组）和低值区（组），表明成矿物质有深浅两个不同来源；不同金矿氢、氧同位素指示成矿热液水为深源岩浆水与古大气降水     

Crust-Mantle Electrical Structure in the Area along the Yadong-Burn Co Profile

1.IntroductionUntilnowTibetisstillthearchetypalregionwithcontinentalcollisiongoingoninit,henceitisanidealnaturallaboratoryforstudyingthegeologicevolutionofintracontinentalorogenicbeltandthecrust-mantledeepprocesses,aswellastheinteractionbetweenthemandthesupracrustalmovements.Forthisreason,forseveraldecadesgeologistsandgeophysicistsfromvariouscountrieshavemadeunremittingeffortsinthisregiontoprobeintotheoriginandprocessoftheplateauformation,withavarietyofcognitionsproposed.TheCMPresultsoftheSi…     

西藏甲马弧内盆地的形成演化

位于西藏冈底斯带的甲马弧内盆地是随着甲马岛弧的发育而产生的,沉积了一套滨浅海相活动大陆边缘的沉积物,主要由碎屑岩与海绵礁灰岩构成。在盆地内的上侏罗统至白垩系中,共识别出七个3级层序,包括1个Ⅰ类层序和6个Ⅱ类层序。重新建立了该区层序地层年代格架。层序地层的研究表明,盆地的演化可划分为具深切谷的碎屑陆架阶段,碳酸盐台地与海绵礁形成阶段,滞流的碎屑陆架阶段,无障壁海岸的碎屑陆架阶段和具障壁海岸的碎屑陆架5个阶段。     

关于当代地球科学发展趋势的点滴认识

面对资源、环境、人口、地质灾害等人类的生产、生活乃至生存的严峻危机，需要我们掌握地球内部的客观规律，不断更新和寻找地球科学理论和新的思维方式，掌握地球科学发展趋势，以协调好人与自然、人地关系及社会经济和可持续发展理论，造福于人类。     

旅游活动与水环境耦合分析 ——以玉龙雪山-丽江盆地为例

玉龙雪山是我国季风海洋型冰川发育最为典型的代表性地区,也是北半球最靠近赤道的现代冰川区.丽江市的部分水源来自于玉龙雪山冰川融水,同时玉龙雪山景区每年吸引着上千万的游客来欣赏现代冰川.旅游活动与水环境息息相关且相互作用,水环境的准确刻画是指导与优化区域旅游活动的基础.以世界著名旅游城市丽江市为例,基于实地采样与数据分析,...     

华南燕山晚期构造-岩浆事件与成矿作用——来自广西大瑶山龙头山金矿床的地球化学约束

广西贵港大瑶山成矿带位于华南东南沿海成矿带西南端,对矿带内龙头山金矿黄铁矿化斑岩进行定年的结果为96.1±3.0 Ma,与区域内邻近的平天山侵入岩体(96.2±0.4 Ma)相同.龙头山矿床的Sr同位素组成与其锆石的REE特征表明,成矿作用伴随有大量的流体参与;矿化斑岩与区内侵入相岩石相同的形成时代以及矿化斑岩中锆石C...     

Mine ventilation planning in the 1980s

Conclusions In this paper, the author has attempted to trace the development of mine ventilation planning from the traditional, manual and largely empirical methods of the past to the numerate computer-based techniques of the 1980s.The computer revolution has changed the face of many engineering disciplines, not least mine environmental engineering. Nevertheless, the mining industries of the world have not all been equally progressive in adapting to the flexibility, power and practical utilization of the new methodologies. It is, for example, incongruous that current textbooks on mine ventilation separate completely the topics of network analysis and ventilation planning with very little cross-referencing. Many of the current generation of mine ventilation engineers recognize the need to know about computers but find difficulty in translating this into their daily work. The growing availability of self-teaching, friendly software for personal microcomputers, coupled with interactive graphics, will assist greatly in promoting uncomplicated but powerful usage of computers.Young engineers now graduating from universities and colleges have been brought up in a computer-oriented environment and are competent in interacting with these machines. Indeed, they wonder how the job was ever done without magnetic data bases and high-speed computation aid.     

高温熔融研制岩石标准玻璃方法初步研究:以玄武岩为例

探索了利用高温炉合成玄武岩玻璃制作原位微区主微量元素含量分析的标准物质的实验条件.选取玄武岩标准物质GBW07105(GSR-3)进行高温熔融、淬火实验研究,获得玄武岩玻璃,为合成其他地质样品微区分析标准参考物质的研制提供了参考方法.用激光剥蚀-四极杆等离子体质谱(LA-Q-ICPMS)对样品微区46个主元素和微量元素...     

福建浦城龙堂寺萤石矿地质特征及成因探讨

龙堂寺萤石矿体贮存于断裂带中,通过对成矿地质条件、矿体特征,矿物成分、矿石结构、构造等研究分析,认为该矿属低温热液充填型脉状萤石矿床。