河南省栾川县红庄-元岭金矿床原生晕轴向分带特征及深部成矿远景评价     

周顶 《地质与勘探》2015,51(6):1126-1137

红庄-元岭金矿床位于豫西熊耳山金及多金属成矿带南亚带上,是近年来发现的中型金矿床。通过对该矿床地质特征、成晕元素共生组合及分带特征的研究,认为该区原生晕分带序列整体为正常序列,49号勘探线中存在前缘晕元素与近矿晕元素叠加共存的现象。地球化学参数反映了该区成矿具多期多阶段的特点,部分参数在深部有向高值转折的趋势,Au及近矿晕元素异常规模向深部具有增大趋势,表明深部有一定找矿潜力。结合原生晕轴向序列特征及地球化学参数、异常规模随深度的变化特征,认为浅部找矿的重点应放在海拔约400m以上,攻深找盲的重点应放在海拔300m以下。  相似文献   

Hydrocarbon Inclusion Characteristics in the Cambrian-Ordovician Carbonates of the TS2 Well: Implication for Deep Hydrocarbon Exploration in the Tahe Oilfield,Tarim Basin,Northwest China     

LI Chunquan  CHEN Honghan 《《地质学报》英文版》2015,89(3):852-860

Going deep has been the strategy for the sustainable development of the Tahe Oilfield.Following the TS1 well in block 1,which revealed excellent combinations of hydrocarbon generation,migration and accumulation in the deeper parts of the Tarim Basin,the TS2 well was drilled to learn more about the prospectivity in the deeper parts of the main blocks of the Tahe Oilfield.Seventeen core samples were collected to perform fluid inclusion studies,including petrography,fluorescence microspectrometry,and microthermometry.The results show that the deeper parts of the Tahe Oilfield have a good hydrocarbon potential.The Cambrian source rocks can supply sufficient oil for not only the Cambrian reservoirs,but also for the Lower Ordovician reservoirs.The CambrianOrdovician carbonates reservoirs experienced at least three oil charging events and one late gas charging event.Oil accumulations formed in the early stage of basin evolution were likely destroyed in the late stage with deep burial,tectonic movements,or invasion of hydrothermal fluids.Therefore,the deep hydrocarbon exploration of the Tahe Oilfield,even the whole Tarim Basin,should focus on gas accumulations,although oil accumulations,especially in Cambrian reservoirs,cannot be neglected.  相似文献   

浅谈延吉水洞地区的寻找金矿前景     

苗萌萌  张德庆  刘海龙  全承珍 《吉林地质》2015,(2)

水洞地区位于吉林省东部,处于天山—兴安地槽褶皱区,吉黑褶皱系延边优地槽褶皱带内,是我国比较重要的金成矿带之一[1]。本文介绍了该区的地层、构造、岩浆岩情况。通过化探分析确定了Au元素异常范围,且物探异常区与相应的化探范围内蚀变带相吻合,为该区寻找浅成中、低温热液型金矿奠定了基础。根据野外勘查工作中的实际情况对该区的找矿前景进行预测。  相似文献   

中高纬度大气低频模态研究进展   总被引：1，自引：0，他引：1  

张曼  许小峰  闵锦忠  高庆九 《气象科学》2015,35(6):799-806

大气低频模态是导致中高纬地区季节及气候变化的主要因素,加强低频模态动力机制的认识对于提高短期气候预测水平具有十分重要的科研意义和应用价值。由于中高纬大气低频环流本身的复杂性,关于其动力机制的研究仍然是大气动力学中重点难点问题。本文简单回顾了激发维持低频模态的前两种机制,即:外源强迫、气流的纬向非均匀性对大气低频模态的影响。从观测事实和模式结果出发,着重介绍了瞬变波与基本气流相互作用激发维持低频模态的第三种机制,且详细阐述了线性假设条件下,瞬变波与基本气流相互作用的动力机制。本文最后针对瞬变波与基本气流相互作用研究中一些尚未解决的问题进行了讨论。  相似文献   

Scientists’ framing of the ocean science–policy interface     

《Global Environmental Change》2015

Scientists’ ideas, beliefs, and discourses form the frames that shape their choices about which research to pursue, their approaches to collaboration and communicating results, and how they evaluate research outputs and outcomes. To achieve ocean sustainability, there are increasing calls for new levels of engagement and collaboration between scientists and policy-makers; scientists’ willingness to engage depends on their current and evolving frames. Here, I present results about how scientists involved in diverse fields of ocean research perceived their role as scientists working at or near the ocean science–policy interface and how this related to their perceptions regarding ocean research priorities. The survey of 2187 physical, ecological and social scientists from 94 countries showed that scientists held different perspectives about their appropriate level of engagement at the ocean science–policy interface and the relative primacy of science versus politics in formulating ocean policy. Six clusters of scientists varied in their frames; three clusters accounted for 94% of the sample. Of 67 research questions identified from 22 research prioritization and horizon scanning exercises, the top eight were shared among all three clusters, showing consistency in research priorities across scientists with different framings of their role at the science–policy interface. Five focused on the mechanisms and effects of global change on oceans, two focused on data collection and management for long-term ocean monitoring, and one focused on the links between biodiversity and ecological function at different scales. The results from this survey demonstrated that scientists’ framings of the role of ocean science at the science–policy interface can be quantified in surveys, that framing varies among scientists, and that research priorities vary according to the framings.  相似文献   

运筹学重点课程建设的构建     

陆书斋  李静辉  王旭  谢颖 《测绘与空间地理信息》2011,34(5):31-32

为了进行运筹学重点课程建设,运筹学课程团队提出了课程建设的基本构想,首先对运筹学课程予以定位,其次从运筹学课程的教学内容、课程建设的内容、课程建设的特色三方面确定了运筹学课程建设的目标,最后提出了课程建设主要措施和步骤。  相似文献   

中尺度WRF数值模式系统本地化业务试验   总被引：5，自引：2，他引：3       下载免费PDF全文

段旭  王曼  陈新梅  刘建宇  符睿 《气象》2011,37(1):39-47

利用中尺度WRF数值模式及WRF三维变分同化系统,在对比试验的基础上,选取了适合本地的积云过程、微物理过程和辐射过程的方案组合;选择了NCEP/GFS作为模式的背景场;统计计算了以云南为中心的区域背景误差协方差并替换了三维变分同化系统中原有的背景误差协方差;同时,考虑模式底层高度与地面观测站高度的差异,进行了地面资料地形订正.通过上述试验研究,建立了本地化的中尺度WRF数值预报业务系统,该系统能较好地刻画本地下垫面的动力和热力状况,预报能力有明显改善.  相似文献   

河南遂平石寨铺铁矿区地球物理特征及找矿远景     

李万忠  王凤奎 《火山地质与矿产》2011,(2):129-136

遂平石寨铺铁矿区位于河南省隧平县境内,属于沉积变质型铁矿,含铁层位是太古界太华岩群。依据地球物理特征及物探高精度磁法工作结果,与舞阳铁矿成矿条件对比,预测西北部找矿远景较好。  相似文献   

人工湿地的构建与应用   总被引：8，自引：0，他引：8  

张清 《湿地科学》2011,9(4):373-379

论述了人工湿地污水处理技术的机制和优势,阐述了人工湿地的构建和污水处理研究进展,表明人工湿地的污水处理效率与污染物的种类和污染程度、人工湿地的类型、湿地植物种类、基质类型、水力停留时间和水力负荷等密切相关.在中国,典型人工湿地有3种类型,分别为垂直流人工湿地、潜流式人工湿地和表面流人工湿地,主要用于处理来自化粪池、养殖...  相似文献   

中国喀斯特天坑研究起源、进展与展望   总被引：5，自引：0，他引：5  

税伟  陈毅萍  王雅文  苏正安  张素 《地理学报》2015,70(3)

喀斯特天坑是20世纪末首先在中国南方峰丛和峰林喀斯特地区中发现的一种特殊且宏大的地表负地形,由于具有独特的科学价值和旅游价值,自被发现以来便引起了国内外地貌学者和地质学者的高度关注。对于喀斯特天坑(tiankeng)能否显著区别于其它普通漏斗,而成为一种独立的喀斯特地貌类型,国内外学者已从形态学、成因学、演化发生学等方面进行了深入探究,但仍未取得完全共识。国内外学者在其分类、形成与演化机制、发育条件、地质年代判定、岩溶生态环境等一系列问题上,也进行了较深入的探讨与激烈的争论。同时,对于喀斯特天坑价值的讨论以及开发与保护方面的研究也正引起国内外学者越来越多的关注。为此,论文围绕中国喀斯特天坑的研究阶段、研究进展、价值和开发与保护等主要议题进行了系统性的梳理与评述,进而提出中国喀斯特天坑当前研究中存在的问题和未来的研究方向。  相似文献