农坪金矿床地质特征及成因类型   总被引：6，自引：0，他引：6  

时俊峰  李晨晖 《矿产与地质》1998,12(3):178-182

农坪金矿床产于下古生界五道沟群与燕山期英云闪长（斑）岩接触带英云闪长（斑）岩体内。矿化类型为含金硅化蚀变岩型,矿体受ＮＷ、ＮＥ向断裂及裂隙构造控制,矿床成因类型为次火山热液型。  相似文献   

Information for contributors on Global Geology     

世界地质学 杂志投稿者  亚洲东北 中国吉林大学 《东北亚地学研究》2007,10(1):F0003-F0003

The journal of Global Geology （English Edition ） is sponsored by the International Cen- ter of Geoscience Research and Education in Northeast Asia, Jilin University of China. The former name of the journal was the Journal of International GeoscientiJic Research in Northeast Asia which was started in 1998 and served the scientists and teachers in geosciences in the world, particularly for the scientists from the six countries of the NE Asia including China,  相似文献   

吉南地区万隆组燧石相微生物化石及其古环境意义     

张德军  刘鹏举  尚晓冬  杨犇 《地质学报》2023,97(12):4006-4019

拉伸纪作为承接中元古代蓝菌时代以及成冰纪生物锐减的关键地质历史时期,是探索早期生命与环境演化最重要的时期之一。吉林南部地区地处华北板块东北缘,拉伸系发育完整、出露全,在燧石条带、燧石结核和泥页岩中富含微生物化石,是开展拉伸纪古生物学、生物地层学和古环境研究的理想地区。本次工作利用岩石切片法在吉林南部二道江地区万隆组顶部燧石中发现微生物化石6属9种,其中丝状蓝菌1属4种Siphonophycus robustum,S.typicum,S.kestron,S.solidum;球状蓝菌3属3种Eoentophysalis belcherensis,Gloeodiniopsis lamellosa,Scissilisphaera bistratosa;分类位置未定2属2种Glenobotrydion majorinum,Globophycus rugosum。这些微体化石的发现为开展万隆组古环境分析及生物地层对比研究提供了新的素材。研究显示,万隆组燧石相微生物组合以发育管鞘藻席(Siphonophycus mat)为主要特征,丝状蓝菌呈横向展布,长可达400μm以上,显示原地或近原地埋藏的特点...  相似文献   

桦甸市张家屯矿区石英脉型含金矿床地质特征简述     

马忠颖  刘凡珍  宁甡  万文周 《吉林地质》2010,29(4):23-26

张家屯金矿床是吉林省有色金属地质勘查局六○六队受吉林省桦甸市鑫利隆矿业有限公司的委托,对桦甸市大楼矿区张家区段石英脉型含金银铅锌矿床进行详查评价工作,通过地表工程及旧坑道调查,目前确定为一小型金矿床。工作结果表明,矿化系统有一定延深。本文对金矿床地质特征及矿床成因分析,认为构造、岩浆活动在成矿过程中起着重要作用,对吉林省该区金矿找矿有着指导作用,明确了本区找矿方向。  相似文献   

吉林省松树川银矿床地质特征及找矿方向     

孙云飚  周树亮  孙雪峰  冯修云 《吉林地质》2010,29(4):27-31

松树川银矿床产于燕山期闪长玢岩接触部闪长玢岩体内,矿化类型为硅化蚀变破碎带类型,矿体受区内的北东向—北西向断裂及裂隙构造控制,矿床为受次火山作用控制的中—低温热液型独立的银矿床,矿床工业类型为脉状银矿床。  相似文献   

吉林晚古生代榆木川基性岩的地球化学特征及其岩石成因   总被引：2，自引：0，他引：2  

冯光英  刘燊  钟宏  贾大成  齐有强  王涛  杨毓红 《地球化学》2010,39(5):427-438

位于兴蒙造山带张广才岭块体的榆木川辉绿玢岩,K—AT年龄测定表明其形成年龄为262～264Ma,主微量元素研究表明,辉绿玢岩SiO2含量为47.02％～52.60％,贫K2O（0.13％～0.47％）,Na2O〉K2O,属于低钾拉斑系列,稀土分布模式属于轻稀土略亏损的平坦型,微量元素原始地幔标准化图解中大离子亲石元素（Rh、Ba、Sr）较为富集,但不存在高场强元素（Nb、Ta）的亏损,同位素组成显示Sr同位素初始比值在0.704958～0.705631之间,εNd（t）值（72～81）较高且变化较小,表明其来源于亏损地幔的部分熔融且成岩过程中未受到地壳物质的混染。基性岩形成于造山后的伸展拉张背景,并结合前人的研究成果,认为晚古生代（约270Ma）兴蒙造山带已经进入晚期,此时加厚的岩石圈由于重力不稳定发生拆沉减薄作用,导致软流圈的大量上涌和岩石圈拉张,从而引起先存亏损岩石圈地幔的部分熔融,最后侵入地壳深部形成研究区辉绿玢岩。  相似文献   

吉林省新生代玄武岩中红、蓝宝石矿找矿方向     

靳克  管宏图  于明宽  殷淑芹  郭真  贾海明  楚湘涛  任建超  王馨莹 《世界地质(英文版)》2014,(3)

通过收集前人资料和野外地质调查及地球化学分析,对中国东部发育红、蓝宝石矿的不同地区进行了对比研究,进而从寄主岩类型、寄主岩形成时代和火山机构四周发育的第四系沉积物特征角度,提出了吉林省应将伊舒带、敦密带、东宁-宽甸带作为首选的红、蓝宝石找矿方向。  相似文献   

Economic development and energy efficiency in Jilin Province,China     

ZHANG Huimin  QIU Fangdao  WEI Qiang  TONG Lianjun  YE Xinyue  CHENG Yeqing 《地理学报》2014,24(5):875-888

The relationship between economic development and energy consumption is revealed by employing cointegration theory, the index decomposition method, and a log-linear regression approach based on a case study of Jilin Province, China. The results suggest: 1) the economic development and energy consumption are interdetermined, whose relationship is positive and long-term. The economic development is highly depending on the energy in Jilin Province. 2) Under the condition of other unchanged factors, the change of industrial energy efficiency contributes to the energy saving, while that of industrial structure increases the energy consumption. 3) The industrial structure change enhances the energy intensity, but the energy utility efficiency change lowers it. From the view of contribution to the energy consumption, the contribution of industrial structure was more than that of the energy utility efficiency in 2000-2011. 4) In 2000-2011, the comprehensive energy intensity change and hydroelectricity energy intensity change were related to all industrial structures' change, and the influencing factors about structure of oil energy intensity change were more than those of coal energy intensity change; from the impact degree, agricultural proportion decreased exerted an positive and greater effect on lowering the energy intensity of comprehensive energy and hydroelectricity, and industrial one did on coal and natural gas. Some conclusions can be drawn as follows: the major way to promote the coordinated development of the industrial economy and energy consumption is to optimize the industrial structure by increasing the proportion of the tertiary industry and low energy consumption industrial sectors and to enhance the energy utility efficiency.  相似文献   

基于地理加权回归的吉林省人口城镇化动力机制分析   总被引：8，自引：2，他引：6  

庞瑞秋  腾飞  魏冶 《地理科学》2014,(10)

以吉林省各县域(市辖区)为基本单元,借助第六次人口普查和统计年鉴的相关数据,结合地理加权回归模型和空间自相关分析方法,讨论人口城镇化水平和国有动力、非国有动力、农业动力及外向动力等因素的空间相关关系,并以此解释人口城镇化分县域(市辖区)差异的影响因素。结果表明:国有动力对吉林省人口城镇化的影响作用最大,影响强度由中北部向西南、东南两个方向递减;农业动力和非国有动力分居二、三位,但差别不明显。其中农业动力的影响强度由西北向东南方向递减,非国有动力的影响强度由东南向西北递减;外向动力对人口城镇化的影响力较弱,影响强度各地区差别较大。吉林省人口城镇化未来发展应重视非国有动力的影响和农村现代化的作用;关注人口城镇化动力多元化,考虑实现错位发展和个性化发展。  相似文献   

Spatial structure of central places in Jilin Central Urban Agglomeration,Jilin Province,China   总被引：1，自引：1，他引：0  

Shijun Wang  Yongchao Wang  Dan Wang 《中国地理科学(英文版)》2014,24(3):375-383

Using the radius of gyration from fractal theory, this paper describes the calculation of fractal dimensions for the four tiers of central places in the Jilin Central Urban Agglomeration(JCUA), Jilin Province, China and the structural characteristics of each tier: 1) the 1st tier central place, Changchun Proper(not including Shuangyang District), provides the most service functions and has the most stable primate position; 2) the 2nd tier central places, Jilin Proper, Siping Proper, Liaoyuan Proper and Songyuan Proper have unclear statuses and do not provide certain functions; 3) the 3rd tier central places comprise 23 county-level cities, counties and urban districts(including Shuangyang District of Changchun), exhibiting a dense spatial structure that agrees with theory; 4) the 4th tier contains the largest number of central places(248 designated towns), but they are loosely distributed. In this study, a spatial image of the JCUA was created, based on vectorized data of the urban settlement distribution, which was then modified and abstracted to create a hexagonal network covering the JCUA. Compared to the traditional central place model, the modified spatial image conforms to the K = 3 principle. In reality, however, the growth of some 3rd tier central places should be increased with the cities being upgraded to the 2nd tier so as to overcome that tier′s functional deficiency. The loose distribution in the 4th tier should also be changed. This apparent anomaly can be explained by the fact that the classic hexagon model used to describe the way market areas layout does not exist in the real world. However, this should not be viewed as an obstacle to using central place theory. If its assumptions are properly applied, it can still assist research into the spatial structure of regions.  相似文献