胶东“玲珑-焦家式”金矿资源潜力与找矿   总被引：1，自引：1，他引：0  

李士先  王建收 《山东国土资源》2006,22(12):36-41

“玲珑焦家式”金矿的成岩成矿,从新太古代至中生代存在着继承性的成因关系,成矿具有长期性、多源性特点,但中生代燕山早期岩浆活动是主导成矿因素。区域化探成果显示胶东金矿直接矿源岩———郭家岭花岗岩金的丰度比原始矿源岩———早前寒武纪变质沉积岩系及侵入岩系金的丰度低1/2。郭家岭花岗岩面积在2 km2以上岩体定量估计金亏损总量与胶东金矿总量预测的资源量相当,从一个侧面展现了胶东金矿资源的潜力。望儿山金矿的找矿实践展示,焦家式金矿在1 000 m以下尚有巨大潜力,整个胶东金矿产区在3 000 m以上的资源潜力应在5000 t以上。  相似文献   

雷州半岛人工增雨研究与应用   总被引：3，自引：0，他引：3  

张羽  徐峰 《广东海洋大学学报》2006,26(1):57-61

通过对雷州半岛云水资源气候分布、云的宏观动力学和微观物理学、降水形成机制、人工增雨机制、冷云催化剂与暧云催化剂、播云方式与催化方法的研究和对外场试验的总结，表明：雷州半岛空中具有丰富的云水资源。有暖云降水机制、冷云降水机制和混态云“播种一供水”降水增强机制。人工增雨可进行静力催化和动力催化，使用的冷云催化剂为冰核和致冷剂，暖云催化剂为吸湿性巨核。适宜的人工增雨作业工具为飞机、火箭、地面蚶丙酮溶液燃烟发生器、气球携带AgI焰弹、增雨炮艇等。37高炮不适宜在雷州半岛使用。  相似文献   

基于GIS技术的胶东地区金矿地质异常成矿预测研究     

杨茂森  万国普  曾昭彦 《山东国土资源》2006,(Z1)

该文基于胶东地区丰富的地质、物化探资料,通过建立GIS地质数据库,实现对各类地质空间数据综合分析,了解地质实体之间的相互关系,掌握各种地质异常与金矿分布的关系。运用MapGIS地理信息系统的空间分析方法,对金矿成矿与找矿密切相关的地质异常信息进行提取、叠加,形成组合地质异常,并运用组合地质异常进行金矿成矿预测研究。  相似文献   

Late Quaternary submarine bedforms and ice‐sheet flow in Gerlache Strait and on the adjacent continental shelf,Antarctic Peninsula     

Jeffrey Evans  Julian A. Dowdeswell  Colm Cofaigh 《第四纪科学杂志》2004,19(4):397-407

Geophysical data from Gerlache Strait, Croker Passage, Bismarck Strait and the adjacent continental shelf reveal streamlined subglacial bedforms that were produced at the bed of the Antarctic Peninsula Ice Sheet (APIS) during the last glaciation. The spatial arrangement and orientation of these bedforms record the former drainage pattern and flow dynamics of an APIS outlet up‐flow, and feeding into, a palaeo‐ice stream in the Western Bransfield Basin. Evidence suggests that together, they represent a single ice‐flow system that drained the APIS during the last glaciation. The ice‐sheet outlet flowed north/northeastwards through Gerlache Strait and Croker Passage and converged with a second, more easterly ice‐flow tributary on the middle shelf to form the main palaeo‐ice stream. The dominance of drumlins with low elongation ratios suggests that ice‐sheet outlet draining through Gerlache Strait was comparatively slower than the main palaeo‐ice stream in the Western Bransfield Basin, although the low elongation ratios may also partly reflect the lack of sediment. Progressive elongation of drumlins further down‐flow indicates that the ice sheet accelerated through Croker Passage and the western tributary trough, and fed into the main zone of streaming flow in the Western Bransfield Basin. Topography would have exerted a strong control on the development of the palaeo‐ice stream system but subglacial geology may also have been significant given the transition from crystalline bedrock to sedimentary strata on the inner–mid‐shelf. In the broader context, the APIS was drained by a number of major fast‐flowing outlets through cross‐shelf troughs to the outer continental shelf during the last glaciation. Copyright © 2004 John Wiley & Sons, Ltd.  相似文献   

西南极菲尔德斯半岛白垩纪晚期和第三纪早期岩石的古地磁学及其大地构造意义          下载免费PDF全文

刘椿  朱日祥  郑祥身  刘小汉  金增信  冯宇 《极地研究》1991,3(2):136-143

采自菲尔德斯半岛白垩纪晚期和第三纪早期五个岩层单位的12个采点109块定向岩芯标本进行了系统的古地磁学测定,从中得知,55～45Ma时期,该区极位置与澳大利亚的同时期结果不同,它经历了大约20°～30°的南向水平移动与70°～80°的西向旋转,逐渐地构成了今日彼此相对位置的格架。文章绘制出南极洲的视极移曲线。  相似文献   

胶东三甲金矿床流体包裹体特征   总被引：14，自引：6，他引：8  

胡芳芳  范宏瑞  于虎  刘振豪  宋林夫  金成伟 《岩石学报》2008,24(9):2037-2044

三甲金矿是胶东牟平-乳山金成矿带内重要的石英脉型金矿,金主要产于黄铁矿和多金属硫化物石英脉中。流体包裹体研究表明,三甲金矿蚀变岩石和各成矿阶段金矿石中的流体包裹体主要有三种类型：H2O-CO2包裹体、富CO2包裹体和H2O溶液包裹体。早期乳白色石英中主要赋存原生的H2O-CO2包裹体;成矿期黄铁矿石英脉和多金属硫化物石英脉中的富CO2包裹体主要为原生,随机分布,气液比变化较大,常与早期H2O溶液包裹体共生且均一温度接近,显示不混溶流体包裹体组合特征;在成矿晚期的石英和方解石中主要发育原生H2O溶液包裹体。显微测温结果显示,成矿前（第1阶段）H2O-CO2包裹体的完全均一温度（Tb．TOT,至液相）为280℃至416℃,成矿期（第Ⅱ和Ⅲ阶段）富CO2包裹体的完全均一温度为210—330℃,同期的H2O溶液包裹体均一温度为253～377℃,成矿后（第Ⅳ阶段）H2O溶液包裹体的均一温度为176—207℃。成矿流体为低盐度的CO2-H2O-NaCl型热液,成矿应力场转变导致的流体减压沸腾作用可能是三甲金矿金沉淀成矿的主要原因。  相似文献   

胶东半岛金矿床控矿构造特点浅析          下载免费PDF全文

赵冬冬  黄吉友  金刚 《地质找矿论丛》2008,23(2):125-129

胶东半岛金矿床的矿体(脉)均严格受断裂构造控制,这种控矿的脆/韧性叠加构造的显著特点是多期(次)活动的叠加,经过了早期的韧性剪切、后期的脆性压扭性碎裂岩化、晚期的脆性张性断裂叠加3个阶段.脆/韧型叠加构造与按"构造相"划分的脆-韧性剪切带是不同的概念,它们是性质和演化历史完全各异的两类断裂构造.金矿往往直接产于张性断裂之中,但是在同空间中更早形成的韧性剪切带和压扭性碎裂岩则对金矿化的规模具有明显的控制作用.  相似文献   

浅海覆盖区金矿勘查技术方法组合探讨——以胶东三山岛北东浅海区找矿勘查为例          下载免费PDF全文

张军进  丁正江  薄军委  祝德成  王金辉  祝培刚 《山东国土资源》2020,36(11)

在浅海覆盖区,常规的地质找矿工作开展难度较大,并缺少有效的技术方法,限制了浅海区找矿勘查工作。本文以三山岛北东浅海地区找矿勘查为例,采用重力测量+高精度磁法剖面测量+地震剖面测量+浅钻取样化探剖面测量+钻探的勘查技术方法组合,解译并控制了浅海覆盖区控矿构造,发现了金矿体。结果表明该技术方法在浅海覆盖区找矿勘查的有效性,对浅海覆盖区找矿勘查具有一定的参考价值。  相似文献   

The relationship between soft-bottom macrobenthic communities and environmental variables off Ningjin, eastern Shandong Peninsula     

LI Baoquan  LI Xinzheng  WANG Hongf  WANG Jinbao  HAN Qingxi  DONG Chao  MA Lin  ZHANG Baolin 《海洋学报(英文版)》2010,29(6):73-82

Macrobenthic infauna and associated environmental factors influencing the benthic community in the eastern coastal region of Shandong Peninsula were analyzed in four seasonal surveys from January 2007 to October 2007 (30 stations in winter, 20 stations in other three seasons), in order to understand the community structure and the factors unfluencing the benthic distribution. PRIMER 6.0 and SPSS 15.0 software packages were adopted to analyze the environmental and macrobenthic data. The results show that there were 260 macrobenthic species in total collected from the research region. The composition of species is:Polychaeta (94 species), Crustacea (75), Mollusca (56) and Echinoderm (12), among which, only 23 species were common species in the cruises of every season. The dominant species varied from season to season; however, the polychaete species Paralacydonia paradoxa Fauvel and Echinoderm species Amphioplus japonicus (Matsumoto) were always present year-round. The abundance and biomass of the macrobenthos in the research region were variable from season to season. The results of CLUSTER and MDS analysis show that the similarities of macrobenthic structures between the stations were low; most of the similarities were at about 30% of similarity value, only two stations were up to 70%. In accordance with the similarity values of the macrobenthic structures, we divided the 20 stations into five groups by arbitrary similarity level of 30%. The ABC curve indicates that the marcofauna communities in the research region had not been disturbed massively, except two stations, SB1 and SB3. Ecologically, benthos were controlled by a combination of factors such as salinity, phytoplankton, zooplankton, SiO₃-Si and temperature, and no single factor could be considered as an ecological master factor.  相似文献   

雷州半岛灯楼角热带海岸的景观生态分类   总被引：1，自引：1，他引：1  

王丽荣  赵焕庭  覃朝锋 《海洋通报》2004,23(1):50-57

海岸景观由于其边缘效应而具有较高的生产力和生物多样性水平，尤其是本区的热带海岸景观，由于发育有我国大陆唯一的珊瑚礁而显独特。本文根据景观生态学的分类方法，将灯楼角热带海岸景观生态划分为3大类（自然景观、经营景观和人工景观）24亚类，并揭示了本区的景观生态系统的等级和景观的演变与时空分布；由陆向海方向上依次出现陆地景观、海岸景观和沿岸浅海景观，而区域自然景观的出现时间序列上，则是陆地景观、沿岸线海景观和海岸景观。  相似文献