大兴安岭北部主要金属矿床成矿系列和区域矿床成矿谱系

文章以大兴安岭北部内生金属矿床、海相火山岩型硫铁矿矿床和砂金矿床为研究对象,按照矿床成矿系列的学术思想将其划分为7个矿床成矿系列,即:多宝山地区与加里东期中酸性火山_侵入活动有关的铜、钼矿床成矿系列,呼玛地区与华力西期辉长岩和花岗岩有关的铁、钛、金矿床成矿系列,伊尔施_黑河地区与华力西期花岗岩和海相火山岩有关的铁、铜、锌、硫铁矿矿床成矿系列,牙克石地区与华力西期海相中基性火山岩有关的铁、锌、硫铁矿矿床成矿系列,得尔布干地区与印支期_燕山期中酸性火山_侵入活动有关的铅、锌、银、铜、钼、金矿床成矿系列,伊尔施_呼玛地区与燕山期中酸性火山_侵入活动有关的金、铁、锌、铜、钼、钨矿床成矿系列和黑龙江流域与第四纪冲积沉积作用有关的砂金矿床成矿系列。大兴安岭北部区域矿床成矿谱系表明,从奥陶纪到新生代该区不同构造单元经历了7个主要的构造演化及成矿时期,依次出现奥陶纪岛弧环境的斑岩型矿床、泥盆纪陆块边缘拉张环境的岩浆型和热液脉型矿床、泥盆纪—石炭纪俯冲_碰撞环境的海相火山岩型和矽卡岩型矿床、石炭纪弧后盆地环境的海相火山岩型矿床、晚三叠世—早白垩世俯冲_碰撞_后碰撞环境的斑岩型、热液脉型、浅成低温热液型和矽卡岩型矿床、早侏罗世—早白垩世俯冲环境的斑岩型、热液脉型、浅成低温热液型和矽卡岩型矿床和新生代地壳差异运动带砂金矿床。大兴安岭北部优势矿种为铜、钼、金、银、铅、锌,主攻矿床类型为斑岩型、热液脉型、低硫化浅成低温热液型、冲积型和海相火山岩型。     

贵州低温热液型汞、锑、金矿床成矿谱系——以晴隆大厂、兴仁紫木凼和铜仁乱岩塘为例

贵州是我国低温热液型汞、锑、金矿的重要产区,但对其成矿时代一直存在不同看法.本次研究采用Sm-Nd同位素等时线法对晴隆大厂锑矿、兴仁紫木凼金矿和铜仁乱岩塘汞矿区的萤石、方解石分别进行了同位素年代学的研究,结果表明晴隆大厂锑矿中的方解石(Sm-Nd等时线年龄为148±13 Ma,钕初始值为0.512256)和萤石(Sm-...     

浙江矿产时空分布规律综述

通过对浙江省主要矿产的矿床数量、规模、矿产组合时间演化以及成矿分带性、丛聚性等特征的分析与归纳,概要总结了浙江省矿产资源的时空分布规律。通过系统收集和整理浙江省同位素成矿年龄资料,建立起全省成矿年代学谱系,并结合大地构造演化,将浙江省的成矿活动划分了5个时段。通过矿床数量、矿床规模以及矿产组合对比分析各时段的成矿信息和演化特征,构建了成矿时间演化图。依据浙江省矿产资源空间分布特征,将浙江省划分了4个Ⅲ级成矿带和7个Ⅳ级成矿亚带,从成矿密度和成矿强度的角度探讨各Ⅳ级成矿亚带矿床的分布规律。其中成矿密度划分了1个高密度区、4个中密度区和2个低密度区,综合矿产成矿强度划分了3个强成矿强度区、1个中成矿强度区和3个弱成矿强度区,以此为找矿方向和规划部署提供新思路。     

当前气候、古气候和生境异质性对中国常绿阔叶木本植物生物地理格局的影响（英文）

Understanding biogeographic patterns and the mechanisms underlying them has been a main issue in macroecology and biogeography, and has implications for biodiversity conservation and ecosystem sustainability. Evergreen broad-leaved woody plants(EBWPs) are important components of numerous biomes and are the main contributors to the flora south of 35°N in China. We calculated the grid cell values of species richness(SR) for a total of 6265 EBWP species in China, including its four growth-forms(i.e., tree, shrub, vine, and bamboo), and estimated their phylogenetic structure using the standardized phylogenetic diversity(SPD) and net relatedness index(NRI). Then we linked the three biogeographical patterns that were observed with each single environmental variable representing the current climate, the last glacial maximum(LGM)–present climate variability, and habitat heterogeneity, using ordinary least squares regression with a modified t-test to account for spatial autocorrelation. The partial regression method based on a general linear model was used to decompose the contributions of current and historical environmental factors to the biogeographical patterns observed. The results showed that most regions with high numbers of EBWP species and phylogenetic diversity were distributed in tropical and subtropical mountains with evergreen shrubs extending to Northeast China. Current mean annual precipitation was the best single predictor. Topographic variation and its effect on temperature variation was the best single predictor for SPD and NRI. Partial regression indicated that the current climate dominated the SR patterns of Chinese EBWPs. The effect of paleo-climate variation on SR patterns mostly overlapped with that of the current climate. In contrast, the phylogenetic structure represented by SPD and NRI was constrained by paleo-climate to much larger extents than diversity, which was reflected by the LGM–present climate variation and topog-raphy-derived habitat heterogeneity in China. Our study highlights the importance of embedding multiple dimensions of biodiversity into a temporally hierarchical framework for understanding the biogeographical patterns, and provides important baseline information for predicting shifts in plant diversity under climate change.     

粤港澳大湾区技术创新特征及其演化路径

粤港澳大湾区定位为具有全球影响力的国际科技创新中心,其技术创新活动深刻影响中国参与全球技术创新的竞争和合作。论文基于演化经济地理学的技术(知识)异质性视角,使用包括申请人地址和专利分类号的2001—2016年粤港澳大湾区授权发明专利数据,通过运用分布拟合、技术空间可视化和Logit回归模型等方法,对其技术创新特征及其路径演化进行深入剖析。研究结果表明：(1)粤港澳大湾区的技术创新类别呈现幂律分布,集中在电通信及计算等少数技术类别,存在马太效应,技术的路径依赖较强。技术创新的跨产业“产品—零部件/软件—新产品(新产业)”和产业链上游“产品—零部件—基础材料”的关联拓展带动了区域的产业升级。(2)粤港澳大湾区各城市的技术演化路径存在较大差异,深圳在专注核心技术的同时,进行相关多样化;广州从其强势的医学转向电通信及计算技术,进行非相关多样化。粤港澳大湾区的区域创新趋于同质,未来需要进一步促进城市间创新协同。对比现有文献,论文提出技术创新路径受到所在区域技术创新特征的强烈影响,当前全球—地方(城市)视角研究需要加入区域尺度。     

Extracting and analyzing semantic relatedness between cities using news articles

News articles capture a variety of topics about our society. They reflect not only the socioeconomic activities that happened in our physical world, but also some of the cultures, human interests, and public concerns that exist only in the perceptions of people. Cities are frequently mentioned in news articles, and two or more cities may co-occur in the same article. Such co-occurrence often suggests certain relatedness between the mentioned cities, and the relatedness may be under different topics depending on the contents of the news articles. We consider the relatedness under different topics as semantic relatedness. By reading news articles, one can grasp the general semantic relatedness between cities; yet, given hundreds of thousands of news articles, it is very difficult, if not impossible, for anyone to manually read them. This paper proposes a computational framework which can ‘read’ a large number of news articles and extract the semantic relatedness between cities. This framework is based on a natural language processing model and employs a machine learning process to identify the main topics of news articles. We describe the overall structure of this framework and its individual modules, and then apply it to an experimental dataset with more than 500,000 news articles covering the top 100 US cities spanning a 10-year period. We perform exploratory visualizations of the extracted semantic relatedness under different topics and over multiple years. We also analyze the impact of geographic distance on semantic relatedness and find varied distance decay effects. The proposed framework can be used to support large-scale content analysis in city network research.     

成矿谱系研究及对东天山铁矿找矿问题的探讨

论述了成矿谱系研究的概要过程,指出了成矿谱系两方面的内涵,即“矿床成矿(亚)系列随着地质历史时期而发生规律性变化”和“成矿元素在同一地区长期聚集”。区域成矿谱系实际上就是区域成矿作用的演化历史及其分布规律。结合哈密小红山铁矿的发现,本文从铁的成矿谱系的角度出发,认为东天山地区具有寻找铁矿的巨大潜力。通过借鉴华北陆块北缘铁矿的成矿谱系和阿尔泰的成矿谱系,开拓找矿思路,尽早开展东天山地区铁矿资源潜力的评价和新一轮找矿工作,立足于新的成矿时代、新的矿床类型和老矿山的攻深找盲,要取得找矿突破是完全可能的。     

同源花岗岩谱系填图——内蒙古二连宝德尔石林花岗岩填图试点

单元-超单元花岗岩谱系填图方法是以同源岩浆演化理论为指导思想建立发展的。该方法从20世纪80年代开始在中国推广和应用,然而,随着岩浆岩理论的不断发展及填图实践过程中遇到的问题,填图方法回归到早期的"岩性+时代"方法。在新的形势下,如何开展好新一轮的花岗岩填图工作,谱系填图是否仍具有适用性值得分析探讨。以中蒙边境地区出露的宝德尔石林花岗岩体填图试点成果为例,阐述岩浆岩填图试点方法的可行性。填图结果显示,该岩体为复式杂岩体,发育约160Ma和140~124Ma两期二长花岗岩,这两期二长花岗岩时代和岩石结构存在差别,野外的主要区别在于粒度。它们处于同一个区域性伸展背景,属于同源岩浆演化的产物。依据谱系划分方案,可以划分为晚侏罗世和早白垩世2个序列及5个单元,且可以进行区域对比。因此,基于岩浆演化规律,以解体岩体和进行岩石类型归并为精髓的谱系填图对于同源花岗岩仍是适用和必须的,但不可扩大化。     

西秦岭成矿带矿床成矿系列概论

对西秦岭成矿带总结了11个矿床成矿系列：①早古生代沉积作用有关钼-钒-锰-磷-石煤-石灰岩矿床成矿系列。②晚古生代沉积作用有关铅-锌-铁-磷-石灰岩-白云岩-石膏-煤-黏土-砚石矿床成矿系列。③晚古生代岩浆作用有关铜-铅-锌-锡-铬-饰面超基性岩矿床成矿系列。④中生代沉积作用有关白云岩-石灰岩-煤-油页岩矿床成矿系列。⑤中生代变质作用有关大理岩-红柱石-饰面角岩矿床成矿系列。⑥中生代岩浆作用有关铁-铜-铅-锌-金-银-钼-钨-锡-锑-砷-饰面花岗岩矿床成矿系列。⑦中生代流体作用有关铁-铜-铅-锌-金-锑-汞-硫矿床成矿系列。⑧中生代晚期-新生代早期流体作用有关金-铀矿床成矿系列。⑨新生代沉积作用有关砂金-砂钨-黄土-石膏-盐-泥炭矿床成矿系列。⑩新生代表生作用有关铁-铅-锌矿床成矿系列。B11新生代流体作用有关地下水-矿泉水-地热水矿床成矿系列。     

广东银矿成矿系列及区域成矿谱系

本文将广东省银矿床厘定为5个矿床成矿系列、6个矿床成矿亚系列,即云开地区与加里东运动有关的银矿床成矿系列、华南与晚古生代沉积作用有关的银矿床成矿系列(包括华南中泥盆世至早石炭世与海相碳酸盐岩有关的银矿床成矿亚系列和粤东北中晚石炭世与火山-沉积作用有关的银矿床成矿亚系列),南岭及周边与燕山期构造-岩浆作用有关的银矿床成矿系列、东南沿海与燕山期火山-侵入活动有关的银矿床成矿系列(包括粤东北印支-燕山期与残余海相火山活动有关的银矿床成矿亚系列和粤东与燕山晚期侵入岩有关的银矿床成矿亚系列)和三水-罗定盆地与燕山-喜山期岩浆-流体有关的银矿床成矿系列(包括粤东北印支-燕山期与残余海相火山活动有关的银矿床成矿亚系列和三水盆地与晚白垩世-古近纪构造或火山活动有关的银矿床成矿亚系列)。分别论述了各成矿(亚)系列的基本特征,并根据广东省区域地质构造发展史,建立了银矿区域成矿谱系。