内蒙古哈达门沟金矿构造演化及成矿控矿构造特征   总被引：1，自引：0，他引：1  

牛树银  孙爱群  马宝军  江思宏  聂凤军  张建珍  王宝德  夏冬 《地学前缘》2015,22(1):223-237

哈达门沟金矿是内蒙古迄今最大的金矿床,具有超大型金矿床规模。金的成矿作用对岩性没有明确的选择性,而主要是受褶皱断裂构造的控制。成矿流体主要来自深源,在有利的构造扩容带中聚积成矿。研究表明,该区的构造变形从早到晚,力学性质往往从塑性到脆性,构造规模从小到大,构造类型则是褶皱与剪切带同时形成,或相间发育。该区主要经历了4个期次的强烈褶皱剪切作用,并形成了主要的成矿控矿构造。第一期构造变形时岩石的流变性较强,褶皱幅度较小,一般多表现为小规模的塑性流变褶皱,并产生了小规模韧性剪切带;第二期(主期)褶皱以乌拉山主峰为主的东西向区域规模的复式背、向斜(形),并在主期褶皱的倒转翼发育了一系列与褶皱同向延伸的脆韧性剪切带,它们构成了区域性构造薄弱带;第三期为横跨叠加褶皱,使近东西向褶皱发生了南北向蛇形弯曲,伴随该期褶皱作用形成了低绿片岩相韧脆性剪切带,为深源成矿流体的贯入与集聚成矿提供了很好的赋存空间,是主要的成矿控矿构造;第四期构造变形则以区域性隆升作用为主,使早期褶皱发生横弯褶皱的同时,还将深部形成的金矿体抬升至浅部。文中在成矿控矿构造研究的基础上,探讨了矿床成矿规律,提出了找矿远景。  相似文献   

国家数字地震台数据自动备份软件   总被引：5，自引：3，他引：2  

马宝君  赵谊  闫峰  马莉  马坤 《地震地磁观测与研究》2004,25(5):53-56

国家数字地震台网数字地震台数据采集系统硬件由两台计算机和其他一些外部设备组成,由于两台机器需要连续24小时不间断工作,为了保证机器的高稳定性工作,多数台站的前台机都选用了工控机,工控机的价格较贵,考虑到价格因素,建台初期,各台上的工控机的配置都不高,通常硬盘只有2G大小,最多能存储10天的地震数据,如不及时备份,就会造成数据的丢失,因此,每天到前台机备份连续波形数据和地震事件文件就成了一项重要工作。计算机及网络技术的蓬勃发展,给各个领域都带来翻天覆地的变化,对于我们数字化观测系统所带来的变化也是日新月异。它使得该领域的研究及工作方法一直处于不断的完善和更新中,利用计算机提供的强大功能完全可以实现数据备份的自动化,我们利用Visual Basic6．0开发了国家数据地震台数据自动备份软件,该软件每天将上一天的数据自动复制到指定的机器中,编好的程序可以加入Windows操作系统,随机器自动定时启动,自动完成数据备份任务。  相似文献   

Using an airgun array in a land reservoir as the seismic source for seismotectonic studies in northern China: experiments and preliminary results   总被引：15，自引：0，他引：15  

Yong Chen  Lanbo Liu  Hongkui Ge  Baojun Liu  Xuelin Qiu 《Geophysical Prospecting》2008,56(4):601-612

This paper reports the field setup and preliminary results of experiments utilizing an airgun array in a reservoir in north China for a seismotectonic study. Commonly used in offshore petroleum resource exploration, the airgun source was found to be more useful than a traditional explosive source for large‐scale and long offset land seismic surveys. The airgun array, formed by four 1,500 in³ airguns (a total of 6,000 in³ in volume) was placed at a depth of 6–9 m into the reservoir to generate the pressure impulse. No direct evidence was found that the airgun source adversely affected the fish in the reservoir. The peak ground acceleration recorded on the top of the reservoir dam 100 m away was 17.8 gal in the horizontal direction; this is much less than the designed earthquake‐resistance threshold of 125 gal for this dam. The energy for one shot of this airgun array is about 6.68 MJ, equivalent to firing a 1.7 kg explosive. The seismic waves generated by the airgun source were recorded by receivers of the regional seismic networks and a temporary wide‐angle reflection and refraction profile formed by 100 short‐period seismometers with the maximum source‐receiver offset of 206 km. The seismic wave signature at these long‐offset stations is equivalent to that generated by a traditional blast source in a borehole with a 1,000–2,000 kg explosive. Preliminary results showed clear seismic phases from refractions from the multi‐layer crustal structures in the north China region. Forward modelling using numerical simulation confirms that the seismic arrivals are indeed from lower crustal interfaces. The airgun source is efficient, economical, environmentally friendly and suitable for being used in urbanized areas. It has many advantages over an explosive source for seismotectonic studies such as the high repeatability that is supreme for stacking to improve signal qualities. The disadvantage is that the source is limited to existing lakes or reservoirs, which may restrict experimental geometry.  相似文献   

在SUSE Linux系统下通过ADSL网络实现地震波形浏览     

马莉  马宝君 《地震地磁观测与研究》2008,29(5):94-97

针对SUSELinux系统下非固定IP接入的ADSL入网方式不能直接浏览地震波形的问题,介绍了解决这一问题的方法,该方法已在沈阳地震台和牡丹江地震台实践取得了成功。  相似文献   

Evaluation of vertical crustal movements and sea level changes around Greenland from GPS and tide gauge observations     

Jiachun An  Baojun Zhang  Songtao Ai  Zemin Wang  Yu Feng 《海洋学报(英文版)》2021,40(1):4-12

To better monitor the vertical crustal movements and sea level changes around Greenland, multiple data sources were used in this paper, including global positioning system(GPS), tide gauge, satellite gravimetry, satellite altimetry, glacial isostatic adjustment(GIA). First, the observations of more than 50 GPS stations from the international GNSS service(IGS) and Greenland network(GNET) in 2007–2018 were processed and the common mode error(CME) was eliminated with using the principal component analysis(PCA). The results show that all GPS stations show an uplift trend and the stations in southern Greenland have a higher vertical speed. Second, by deducting the influence of GIA, the impact of current Gr IS mass changes on GPS stations was analysed, and the GIA-corrected vertical velocity of the GPS is in good agreement with the vertical velocity obtained by gravity recovery and climate experiment(GRACE). Third, the absolute sea level change around Greenland at 4 gauge stations was obtained by combining relative sea level derived from tide gauge observations and crustal uplift rates derived from GPS observations, and was validated by sea level products of satellite altimetry. The results show that although the mass loss of Gr IS can cause considerable global sea level rise, eustatic movements along the coasts of Greenland are quite complex under different mechanisms of sea level changes.  相似文献   

城市热岛效应对土的工程性质影响及灾害效应分析   总被引：3，自引：0，他引：3  

施斌  刘春  王宝军  赵理政 《地球科学进展》2008,23(11):1167-1173

随着世界各国,尤其我国的城市化进程的不断加快,城市规模不断扩大,城市中高层建筑的密度越来越高,城市热岛效应（UHIE）及其带来的各类环境问题日益突出。对于城市热岛效应的研究目前主要集中在城市范围内的大气部分,对于它对城市赖于存在的地质环境的影响研究很少,而对土的工程性质的影响及其灾害效应常被忽视。从UHIE与城市地下土体工程性质间的关系出发,介绍了UHIE的成因和发展程度,剖析了城市环境中的土体与自然环境中土体的差别以及UHIE影响土体工程性质的方式,初步分析了UHIE对土的工程性质的影响及其引起的灾害效应。分析成果对于开展城市热岛效应环境中土的工程性质变化及其灾害效应研究有重要的指导意义。  相似文献   

豫西南中新生代古地理环境变迁     

冯祖杰  周旗  王军  谷保俊 《河南国土资源》1997,(4)

豫西南地区曾经是恐龙生活的“家园”。本文根据区内地层发育和出露特点，结合地壳（构造）活动规律，对豫西南中、新生代自然古地理环境（古地理、古环境、古气候、古生态）进行初步研究。这一研究结果对展示中生代恐龙的自然生态、生活环境，揭示恐龙演化规律和灭绝原因，具有一定的理论和实际意义。  相似文献   

崤山地区隐伏花岗岩体及其找金前景     

陈铁华  赵保军  张天义  朱嘉伟 《河南国土资源》1997,(1)

航磁、重力异常和遥感影像证实，在崤山太华群之下有一隐伏花岗岩体存在，其规模可与小秦岭文峪岩体相比，岩体从南西（深处）向北东（浅处）侵入，在申家窑以北又转向北西。岩体的发现，深化了基础地质的研究程度，解决了金矿成矿的热源问题。研究表明，崤山地区金矿成矿条件优越，具备找到大型金矿的前景。经综合分析，预测了三个有希望的成矿区  相似文献   

雅鲁藏布中新生代深水沉积盆地形成和演化(Ⅲ)——喜马拉雅被动大陆边缘构造沉降分析          下载免费PDF全文

徐强  刘宝珺  余光明  G. Einsele  W. Frisch  刘光华  J. Wendt  A. Wetzel  L. Ratschbacher  H. P. Luterbacher 《沉积与特提斯地质》1993,(1):58-65

喜马拉雅特提斯中、新生代属印度板块北部被动大陆边缘。对充填这个被动大陆边缘的沉积物用“反剥法”(backstrippiog)进行研究,恢复了从被动大陆边缘到前陆盆地的抓降史。对分离出的盆地构造沉降曲线与McKenzie模式图版进行对比相关性分析,判断认为被动大陆边缘成熟期主要为热耗散沉降,前陆盆地时逆冲推覆动力为主要影响因素。  相似文献   

太行山麻棚地区金矿地质特征及找矿前景分析     

陈超  牛树银  张福祥  马宝军  孙爱群  王海涛  张醒  张浩亮 《地质论评》2016,62(S1):293-294

太行山中段麻棚地区成矿地质条件优越,已经成为冀西最重要的金银多金属矿集区,近年先后发现金床（点）15处。它们皆位于麻棚岩体周围,具有相似的成矿地质背景,但目前具开采价值的大型矿床仅石湖金矿一地,其它大多仍处于普查阶段。前人关注的焦点是石湖金矿典型矿床的解剖,而在区域金矿之间的对比研究不够深入,因而本文从幔枝构造的视角出发,试着在本区地质特征基础上总结其成矿规律,进一步指导找矿。  相似文献