A Preliminary Review of Metallogenic Regularity of Tungsten Deposits in China     

SHENG Jifu  LIU Lijun  WANG Denghong  CHEN Zhenghui  YING Lijuan  HUANG Fan  WANG Jiahuan  ZENG Le 《《地质学报》英文版》2015,89(4):1359-1374

Tungsten ore resources are abundant in China with relatively complete types of deposits. Skarn type and quartz vein type deposits are dominated in the tungsten resources, whereas quartz vein type wolframite deposits are most important in terms of exploitation and utilization. Skarn type tungsten deposits are concentratedly distributed in the central Nanling region, such as South Hunan, South Anhui and the eastern Qinling region, while quartz vein type tungsten deposits occur mainly in South China, such as West Fujian, South Jiangxi, North Guangdong and South Hunan. The most important metallogenic epoch of tungsten is the Mesozoic, while the metallogenic tectonic setting is featured by an intracontinental environment after orogeny with sever tectonic movements, deep-seated faults and frequent magmatic activities, especially Mesozoic granitoids closely related to tungsten-tin mineralization. 22 metallogenic series of ore deposits characterized by or significantly related to tungsten were defined based on precise statistic information of 1199 tungsten mining areas and thorough the summary of metallogenic regularities. Based on studies of the metallogenic regularity of tungsten deposits, skarn type (or greisen type), quartz vein type and massif-type of tungsten deposits are thought to be the key prediction types. 65 tungsten-forming belts and 22 key ore concentration areas were ascertained and a distribution map of tungsten-forming belts of China was compiled, which provided a theoretical basis for evaluation and prediction of potential tungsten resources.  相似文献   

A Preliminary Review of Metallogenic Regularity of Copper Deposits in China   总被引：3，自引：0，他引：3  

YING Lijuan  CHEN Yuchuan  WANG Denghong  TANG Juxing  CHEN Zhenghui  WANG Chenghui 《《地质学报》英文版》2015,89(1):251-269

Copper resources in China are rich, but imported copper products are still required. Researches on metallogenic regularity of major types of copper deposits by geologists have involved in worldwide classification, significant copper belts, representative copper deposits, etc. Studies on metallogenic regularity of copper deposits in China also have made achievements with a long-term work. Combined with latest exploration advances obtained in recent ten years, this review aims to conclude the achievements of researches on copper metallogenic regularity in China. Based on data of 814 copper deposits and other ore (mineralized) occurrences, ten prediction types of copper deposits have been suggested. Porphyry and skarn copper ores are taken as the key targets. Porphyry copper deposits are the most important one which concentrate in Gangdese, Changdu-Sanjiang, Dexing and East Tianshan. The Cenozoic and Mesozoic are the major metallogenic epochs. Four main metallogenic epochs are been studied based on the copper ore geochronological data including Precambrian Era (Archean and Proterozoic), Paleozoic Era, Mesozoic Era and Cenozoic Era. Based on the study of metallogenic series of ore deposits in China, twenty-seven metallogenic series of copper deposits are proposed. This is suggested to deepen the study of metallogenic regularity of copper ore and provide the theory guide for copper resources prediction in China.  相似文献   

A Preliminary Review of Metallogenic Regularity of Gold Deposits in China   总被引：2，自引：0，他引：2  

WANG Chenghui  WANG Denghong  XU Jue  YING Lijuan  LIU Lijun  LIU Shanbao 《《地质学报》英文版》2015,89(2):632-651

Gold is one of the most important mineral resources in China with its rich mineral resources. In recent years,significant progress has been made on the process of gold resource exploration. Some large and giant gold deposits were newly found and some important expansions in the main mining regions were also been completed. Studies on metallogenic regularity of gold deposits in China also have made achievements with a long–term work. This review aims to conclude the achievements of research on gold metallogenic regularity in China. Based on the data of about 2000 gold deposits and other ore(mineralized) occurrences,gold deposits in China were classified into five prediction types: gold deposits genetically related to granite–greenstone formation,gold deposits related to sedimentary formation(including the Carlin type and the metamorphosed clastic rock related vein gold deposit),gold deposits genetically related to volcanic rocks(including the continental and marine types),gold deposits genetically related to intrusions(including the porphyry type and the inner intrusion and contact zone related gold deposit),gold deposits of supergenesis(including fracture zone–altered rock gold deposit,placer gold deposit,gossan type gold deposit and soil type gold deposit). Statistics on precise chronology data of gold deposits indicate that there occurred 5 main periods of gold–mineralization in geological history of China. They were Neoarchean to Paleoproterozoic,Meso–Neoproterozoic,Paleozoic,Mesozoic,and Cenozoic. Gold deposits in China mainly formed in the Mesozoic and the Cenozoic. On the studies of the spatial–temporal distribution characteristics of gold deposits,53 gold–forming belts were delineated in China. The metallogenic regularity of gold deposits was preliminarily summarized and 71 gold metallogenic series were proposed in China. This suggests that it is necceary to deepen the study on metallogenic regularity of gold deposits and to provide the theory guide for the ore–prospecting for gold resources in China.  相似文献   

海南儋州人工岛建设对海床冲淤影响数值模拟   总被引：1，自引：0，他引：1  

英晓明  贾后磊  曹玲珑  谢健 《海洋通报》2014,33(5):571-575

利用Delft3D数值模式建立了洋浦海域二维嵌套水沙数学模型,在对模型进行了验证基础上,模拟了海花岛实施前后海床冲淤演变和潮流变化。由于洋浦海域含沙量较低,附近沙源少,海花岛实施后附近海域海床淤积幅度较小。由于小铲礁南侧水流动力增加,小铲礁南侧和洋浦航道局部为冲刷。  相似文献   

海南儋州人工岛建设对海床冲淤影响数值模拟(英文)     

英晓明  贾后磊  曹玲珑  谢健 《海洋通报(英文版)》2014,(2)

海南儋州海花岛填海规模较大,工程实施引起洋浦海域水动力环境改变,进而影响海床冲淤演变的变化。本文利用Delft3D数值模式建立了洋浦海域二维嵌套水沙数学模型,在对模型进行了验证基础上,模拟了海花岛实施前后海床冲淤演变和潮流变化。由于洋浦海域含沙量较低,附近沙源少,海花岛实施后附近海域海床淤积幅度较小。由于小铲礁南侧水流动力增加,小铲礁南侧和洋浦航道局部为冲刷。  相似文献   

散列式面状注记自动配置技术研究     

张志军  李霖  于忠海  应申 《武汉大学学报(信息科学版)》2011,(6):739-742

参照国家标准图式规范,结合格式塔心理学,总结了散列式面状注记的配置规则,提出了一种新的自动配置方法。首先,用凸包格网法计算注记的候选位置;然后,用影响注记位置的格式塔因子对候选位置进行质量评价;最后,依据冲突规则得到全局最优解。该方法有效地利用了散列式面状要素周边的区域,扩充了注记的可调节性,并被成功地应用于1∶5万地形图的数字制图中。  相似文献   

聚合膜电解浓集法测量低水平氚环境水样的氚比活度   总被引：2，自引：1，他引：1  

王华  殷建军  杨会  林宇  应启和  文云朝 《岩矿测试》2011,30(6):745-750

随着氚同位素电解浓集技术和测量仪器的发展,对低水平的氚比活度可以进行准确测量,但由于现行的氚处理方法的差异,导致氚比活度测定的不确定性增加。本文采用现行的两种氚比活度测量方法碱式电解浓集法和聚合膜电解浓集法测量低水平环境水样的氚比活度,并将结果进行比对。针对聚合膜电解法,通过使用优化结构的装置提高可靠性;对于使用国家标准方法计算出现较大误差的情况下,在氚水回收率的计算数据处理方面提出了死体积的概念,改善了聚合膜电解法测量低水平氚样品的稳定性,使氚比活度的计算结果更加精确。  相似文献   

西藏甲玛铜多金属矿床斑铜矿特征及其成因意义   总被引：6，自引：2，他引：4  

王焕  王立强  应立娟  郑文宝 《矿床地质》2011,30(2):305-317

甲玛矿床是中国国内少见的以斑铜矿为主要含铜矿物的产于斑岩成矿系统内的铜多金属矿床.斑铜矿是该矿床内普遍存在的重要铜矿物之一,广泛分布于矽卡岩型矿石、(矽卡岩化)大理岩型矿石中,有少量产于角岩型矿石中.在硅灰石矽卡岩型矿石内,斑铜矿分布最广,含量也最高,部分矿段中斑铜矿的含量高达7596以上,并与硅灰石呈共生或伴生关系....  相似文献   

西藏甲玛矿区角岩特征及其对深部找矿的意义   总被引：11，自引：2，他引：9  

王登红  唐菊兴  应立娟  林彬  丁帅 《岩石学报》2011,27(7):2103-2108

角岩是西藏甲玛铜多金属矿床近年来钻探工作大量揭露的赋矿围岩之一,其中蕴藏的钼铜资源量已达大型以上规模,不但为甲玛增加资源量提供了新的保障,而且在矽卡岩型和斑岩型之外增加了一种新的矿石类型。但角岩的研究相对薄弱,对其在深部找矿方面的研究更是空白。本文通过对甲玛角岩基本特征的研究,归纳了角岩的空间分布,分析了角岩的物质组成,结合角岩中裂隙的统计结果,推测了深部岩体的中心位置,为深部找矿提出了建议。认为甲玛矿区角岩分布广但厚度不均匀,以ZK3218钻孔最厚(达1027m),向周围逐渐减薄,到矿区西南角和西端多个钻孔中尖灭。角岩型矿体以辉钼矿和黄铜矿为主,ZK3217钻孔中矿体厚达900m,紧邻ZK3218钻孔,矿化普遍,但品位较矽卡岩低。角岩中裂隙统计表明,在ZK1616至ZK3216一带,裂隙密度达40条/米以上,向周围减少。综合角岩的岩石学、矿物学和地球化学等特征, 认为甲玛矿区为角岩提供热源的深部岩浆分布在ZK3216-ZK3217-ZK3218一带,建议布置深钻,深部可能存在矽卡岩型矿体和斑岩型矿体。  相似文献   

川西盆地演化及盆地叠合特征研究   总被引：4，自引：2，他引：2  

李忠权  应丹琳  李洪奎  杨光  曾庆  郭晓玉  陈骁 《岩石学报》2011,27(8):2362-2370

川西盆地位于青藏高原松潘甘孜构造带东缘龙门山前陆地带,是四川盆地的一部分。自震旦纪以来,川西盆地经历了海相盆地与陆相盆地两个时期的演化,其中陆相盆地演化与松潘-甘孜构造带及龙门山的形成发展密切相关。晚三叠世以来,川西盆地与松潘-甘孜构造带、龙门山构造带之间经历了盆岭耦合与盆山耦合两期构造动力学演化过程,形成了结构复杂、多期演化的叠合盆地,其盆地性质、类型在不同地质时期各不相同。总的说来,川西盆地经历稳定克拉通海盆发展时期(震旦纪-中三叠世)、海陆交互相断陷盆地发展时期(上三叠世须家河组一段-须家河组三段)、陆相坳陷盆地发展时期(须家河组四段-中侏罗纪世)、前陆盆地发展时期(晚侏罗世-现今),最终形成了4期单型盆地的有序叠置。  相似文献