江西省区域岩矿石物性数据统计特征     

言会  李磊  张立为  郭友钊 《物探与化探》2004,28(1):19-22,31

介绍以江西省全境和两个地层区为空间范围内的53741个岩矿石密度数据、12677个磁化率数据、12424个剩磁强度数据的岩石物性统计特征,供在江西省境内进行矿区物探工作时参考。  相似文献   

Gold Deposits in Beishan Mountain, Northwestern China   总被引：2，自引：0，他引：2  

Si-Hong Jiang    Feng-Jun Nie  Yan Lie 《Resource Geology》2004,54(3):325-340

Abstract. The Beishan Mountain spans three provinces ‐ Gansu, Xinjiang and Inner Mongolia, having an area of 120,000 km² Tectonically, it transverses three different tectonic units, i.e. Siberia, Kazakhstan and Tarim plates, and is composed of nine ter‐rains with widely exposed Precambrian and Paleozoic strata, complex structures, intensive magmatic activities and widespread ore deposits. It is not only a main part of Tianshan‐Yinshan‐Great Hinggan metallogenic belt in China, but also a key to under‐stand the evolution of central‐Asian orogenic system. At present, more than 100 gold deposits and prospects have been discovered, explored and mined, among which Nanjinshan, Mazhuangshan, Liushashan, Jinwozi, Zhaobishan and Xiaoxigong are the most important ones. Based on the host rocks and the geological features, all these gold occurrences can be subdivided into three groups (or types): (1) hosted by Carboniferous or Permian volcanic or subvolcanic rocks; (2) hosted by or related to plutonic intrusions; and (3) hosted by Precambrian metamorphic rocks. The first group includes the Mazhuangshan gold deposit, which occurs in Hercynian quartz por‐phyry and rhyolite porphyry as gold‐bearing quartz veins. The second group is composed of the Liushashan, Nanjinshan Zhaobishan and Jinwozi gold deposits. Gold mineralization at these four deposits occurs within Hercynian granitoids intrusion: or late Paleozoic sedimentary rocks as quartz veins, veinlets and altered rocks. The Xiaoxigong gold deposit belongs to the third group, and is hosted by Precambrian schist, amphibolite and migmatite as quartz veins and altered rocks. Isotopic age dating data, geological and geochemical evidence suggest that most of the groups 1 and 2 gold deposits were generated during the emplacement of the Hercynian or partly Indosinian intrusions. These intrusions may provide both heat and metals for groups 1 and 2 deposits. In contrast, although the formation is closely related to the Hercynian magma‐tism, the ore‐forming materials of the group 3 deposits may not only come from the intrusions, but also from the Precambrian metamorphic rocks.  相似文献   

提高化肥利用率途径的土壤磁学研究     

郭友钊  余煦明  郑文  周国华  刘占元  李磊  孙彬彬 《物探与化探》2005,29(1):66-70

通过土壤磁学的角度来探讨我国农业生产急需解决的前沿课题之一——提高化肥利用率问题。125组土壤磁化率、营养元素氮、磷、钾和有机碳含量数据来自杭嘉湖平原的平湖地区,分布在560 km²面积内的36个深度剖面。分析这批数据随深度的变化规律,发现非耕作层的土壤磁化率与钾、氮、磷含量具有较好的相关性,而与有机碳含量相关性较差,说明决定土壤磁性的矿物具有保持营养元素的能力。耕作层的土壤磁化率与有机碳、磷含量具有较好的相关性,而与氮、钾含量相关性较差。耕作层的土壤磁化率以及氮、磷和有机碳含量高于非耕作层的土壤磁化率以及氮、磷和有机碳含量,钾含量则相反。从非耕作层至耕作层,土壤磁化率增幅为23.8%,远低于氮增幅55.3%、磷增幅36.6%和钾减幅95.8%,说明该区存在化肥施用不均衡现象,导致土壤磁化率与营养元素含量关系的失衡。提高磁肥或磁化肥的施用量,是提高肥效的持久性与利用率的途径之一。  相似文献   

莺歌海盆地中央坳陷带海底天然气渗漏系统初探   总被引：1，自引：2，他引：1       下载免费PDF全文

李列  宋海斌  杨计海 《地球物理学进展》2006,21(4):1244-1247

地球物理资料表明，莺歌海盆地区麻坑众多，浅层气发育，在高分辨率地震剖面上可以识别出到达海底的地震模糊带，在3.5 kHz的浅层剖面上可见穿透到海底的气体聚集带，在声呐图像可以识别出麻坑.莺歌海盆地不仅在其边缘隆起带沉积层较薄的地区存在海底天然气渗漏现象，而且在中央坳陷带沉积层巨厚的地区也存在海底天然气渗漏，海底天然气渗漏在莺歌海盆地是广泛分布的.莺歌海盆地广泛分布的海底天然气渗漏是全球海底天然气渗漏系统的重要组成部分，海底天然气渗漏系统排出的大量甲烷气体的一部分可能穿越水层到达海面.  相似文献   

国外空间规划特点及其对我国的借鉴   总被引：1，自引：0，他引：1  

张弢  陈烈  慈福义 《世界地理研究》2006,15(1):56-62

空间规划是社会经济、社会文化和生态政策的地理表达,因此受地域、历史文化、法律、政体的影响很大,各国的空间规划体系形成了各自的特点。本文首先有着悠久规划历史的英、美、日、德、法和欧盟的空间规划的特征及发展趋势进行了分析比较,在此基础上,剖析了我国空间规划存在的问题,指出国外空间规划经验对我国空间规划借鉴的七个方面。  相似文献   

区域自然资源可持续利用创新模式研究     

张弢  陈烈 《世界地理研究》2006,15(2):36-40

区域可持续发展要求有源源不断的后续资源供应为保证,资源问题是区域发展的核心问题之一。本文界定了区域自然资源可持续利用的概念,构建了区域自然资源可持续利用模式并进行了实证分析。  相似文献   

粤北山区区域差距与协调发展战略研究--以广东省韶关市为例     

税伟  陈烈  张启春  王兴贵 《云南地理环境研究》2006,18(2):80-85

为了测度粤北山区的韶关市区域内部和外部的差距，首先对广东省的市际和地带性差距进行了分析，然后测度和分析了韶关市各县（市）区域差距的变动趋势。进而分析了韶关市现有区域协调政策的成绩和存在的问题。在此基础上，提出了韶关市的区域协调发展战略：建立健全多层次的区域协调机构；加大纵向和横向政府财政转移支付的力度；加强与相邻相关地区的协调；进行指引型区域管治。  相似文献   

Vertical structure of the M<Subscript>2</Subscript> tidal current in the Yellow Sea   总被引：2，自引：0，他引：2  

Seok Lee  Heung-Jae Lie  Cheol-Ho Cho  Sok Kuh Kang  William J. Teague  Kyung-Il Chang  Kyu-Min Song  Kyung-Hee Oh 《Ocean Science Journal》2011,46(2):73-84

The vertical structure of the M₂ tidal current in the Yellow Sea is analyzed from data acquired using an acoustic Doppler current profiler. The observed vertical profiles of the M₂ tidal current are decomposed into two rotating components of counter-clockwise and clockwise, and restructured using a simple one-point model with a constant vertical eddy viscosity. The analyzed results show that the internal fictional effect dominates the vertical structure of the tidal current in the bottom boundary layer. In the Yellow Sea, the effect of the bottom friction reduces the current speed by about 20–40% and induces the bottom phase advance by about 15–50 minutes. In the shallower coastal regions, the effects of bottom topography are more prominent on the vertical structure of tidal currents. The vertical profile of the tidal current in summer, when the water column is strongly stratified, is disturbed near the pycnocline layer. The stratification significantly influences the vertical shear and distinct seasonal variation of the tidal current.  相似文献   

有机烃新方法在金矿床快速定位预测中的应用:以陕西八卦庙特大型金矿床为例   总被引：4，自引：0，他引：4  

吴烈善  韦龙明 《地球化学》2001,30(6):579-584

有机质对金属元素的迁移、沉积和富集成矿有重要的作用，有机烃是有机质最终的裂解产物，具有很强的挥发性和穿透性。研究发现，八卦庙金矿床有机烃与金矿体品位呈密切相关关系，矿床的矿化富集中心也是有机烃的浓集中心。利用有机烃的这一特点可以进行隐伏金矿床的定位预测研究。  相似文献   

日本环境评价制度对我国环境评价的启示     

朱桂田  韦龙明  吴烈善 《矿产与地质》2002,16(6):364-368

介绍日本环境影响评价和战略环境评价的有关法规、制度、背景、现状和一些具体的运作方式 ;探讨日本环境评价对我国环境评价的一些启示。  相似文献