《东北地区1：150万大地构造相图》的编制     

刘英才  付俊彧  赵春荆  那福超  宋维民 《地质与资源》2020,29(1):1-6

东北地区1：150万大地构造相图是2018年出版的一份区域性大地构造图.该图依据不断积累和丰富的基础地质资料，将大地构造理论研究与综合应用汇总和集成，是东北地区科技创新成果和技术方法进步转化应用的重要体现.此次编图以板块构造理论和大陆动力学思维为指导，以多岛洋、弧-盆系发展演化观点为切入点，运用大地构造相分析方法，研究东北地区地壳形成、演化历史，以及大地构造环境及其与成矿作用的时空关系.较系统地阐述了东北地区的岩石构造组合、建造构造与构造演化阶段的宏观背景.  相似文献   

An introduction to the classification of the physiognomic landscape types: methodology and results of testing in the area of Kazimierz Landscape Park (Poland)     

Malwina Michalik-Śnieżek  S. Chmielewski  T. J. Chmielewski 《自然地理学》2019,40(4):384-404

The publication of the European Landscape Convention (2000) had a stimulating effect on the development of both new systems of landscape classification and new methods of their evaluation and mapping. As an example, a new classification of physiognomic landscape types was developed in Poland in 2014. The objectives of the paper are to (1) popularize, on the international scale, the classification of physiognomic landscape types in a new, improved version, (2) present the original method of physiognomic landscape types mapping with the use of the system of basic landscape units, and (3) present the results of testing of the method in the area of the Kazimierz Landscape Park, Poland. In the area of the Kazimierz Landscape Park, 491 basic landscape units were delimited, within which, on the basis of the leading traits of land relief and cover forms, the physiognomic landscape types were identified. Maps of this type can be important tools in implementing the recommendations of the European Landscape Convention. The total number of physiognomic landscape types identified within a specific area can be one of the key indicators of landscape diversity.  相似文献   

松辽盆地北部三肇凹陷升554断块特低渗油气储层流动单元研究          下载免费PDF全文

周路路  刘俊刚  舒广强  刘志伟  陈璋  王双桃  汤刚  黎勤国 《中国地质》2021,48(3):807-819

油气储层流动单元在高、中、低渗储层表征中已经得到普遍应用,但在特低渗储层研究中仍然很少涉及。以松辽盆地北部三肇凹陷升554断块下白垩统泉头组四段扶余油层特低渗储层为例,划分出E、G、P三种流动单元类型,从E类至P类流动单元,渗流能力逐渐减小。流动单元物性特征、空间分布特征均表明流动单元储层非均质性较强。分析了沉积相及开启型正断层对流动单元发育的控制作用。研究发现,在特低渗储层尺度内,流动单元自身的渗流能力对油藏开发的作用已经很小,而不同流动单元之间的渗流能力差异引起油藏开发效果的不同也已不明显,开发效果主要取决于砂体射开厚度、注水效果等开发因素以及断层渗流通道、泥岩渗流屏障、砂体厚度等地质因素。这与以往储层流动单元研究中普遍认为的"流动单元渗流能力越强,油藏注水开发效果越好"的观点是截然不同的。通过本文以期为特低渗油气储层流动单元研究提供一定借鉴,为特低渗油藏开发提供一定参考依据。  相似文献   

黑龙江省五常地区重力场特征及区域地质构造特征分析     

牛军平  李宁  关淑艳  张洪普  丁兆芹  华伟  张作新 《吉林地质》2011,30(3):73-77

区域重力调查工作,对断裂的空间位置及区域构造分区是主要地质任务之一。本文利用布格重力异常,进行深部场、浅部场的分析。通过场的分离对区域场与剩余场特征分析;经过异常转换信息划分区域地质构造界线,特别是对Ⅲ级构造单元的划分从重力异常成果中,获得三高二低趋势,通过深大断裂划分确定区域地质构造分区界线,从而重新划分该区Ⅲ级以上构造区块位置,本次工作成果将为今后该区研究工作带来新的信息。  相似文献   

潮水盆地阿右旗坳陷构造特征及其演化     

李翠  房玉涛  李道勇  邵银川  孔凡杜 《山东地质》2011,(11):14-16,22

潮水盆地是印支运动后在阿拉善地块之上发育形成的中、新生代断拗山间盆地,其经历了早、中侏罗世断陷、晚侏罗世坳陷及以后的改造3大阶段。位于盆地西北部的阿右旗坳陷是其重要的次级构造单元,由于控制坳陷展布的断层有正断层、逆冲断层和反转断层等,故分为5块主要的次级构造单元断块。不同时代的坳陷在空间上存在翘倾叠合、叠合保存、部分叠合改造等干涉方式。研究阿右旗坳陷构造特征对该处矿产资源的开发有重要意义。  相似文献   

http://www.sciencedirect.com/science/article/pii/S167498711100079X   总被引：1，自引：0，他引：1  

H.A. Wanas 《地学前缘(英文版)》2011,2(4):491-507

Lower Paleozoic rocks exposed in various regions of Egypt (south central Sinai, north Eastern Desert and southwest Western Desert), in addition to occurring in the subsurface such as north Western Desert and the Gulf of Suez. The Lower Paleozoic rocks in Egypt include surface and subsurface rock units of formational status. The surface rock units are the Taba, Araba and Naqus formations. The subsurface rock units include the Shifa, Kohla and Basur formations. The Infracambrian Taba Formation has been discovered recently in the outcrops of the south eastern Sinai in the Taba-Ras El-Naqab area. It is missing and/or not recognized in the subsurface. The Taba Formation consists mainly of reddish brown, unfossiliferous gravelly fine-to medium-grained sandstones cemented by kaolinite and have subordinate beds of paleosols. The Cambrian Araba Formation and its subsurface equivalent (the Shifa Formation) are essentially composed of reddish brown, fine-grained laminated sandstone and siltstone with abundant Skolithos and Cruziana sp. In contrast, the Ordovician-Silurian Naqus Formation and its subsurface equivalents (Kohla Formation and Basur Formation) are mainly composed of white, unfossiliferous, cross-bedded, medium- to coarse-grained sandstones with haphazardly distributed pebbles and cobbles. Sedimentological analysis indicates that the Araba Formation and its equivalents were deposited in a marginal-marine environment, whereas the Naqus Formation and its equivalents were laid down in a fluvio-glacial environment. Integrated stratigraphic and sedimentological studies of the Lower Paleozoic rocks permit reconstruction of the paleogeography of Egypt at that time. Egypt has been largely controlled since the Cambrian by the pre-existing structural framework of the pre-Phanerozoic basement rocks inherited from the Late Proterozoic Pan-African event. Additionally, sedimentation processes were controlled during Cambro-Ordovician times by tectonic movements, whereas glacio-eustatic control predominated during the Late Ordovician-Silurian Period. These studies suggest that most areas of Egypt were exposed lands with episodically transgression by epicontinental seas related to the paleo-Tethys. These lands formed a part of a stable subsiding shelf at the northern Gondwana margin.  相似文献   

迈陈凹陷构造特征与油气勘探方向分析     

王鹏  赵志刚  柳永杰  李建红  肖伶俐 《海洋地质译丛》2011,(2):13-19

迈陈凹陷位于北部湾盆地南部坳陷,是北部湾盆地的一个三级构造单元。从迈陈凹陷石油地质条件与各构造单元特征入手,详细讨论了迈陈凹陷断裂演化特征以及构造样式和构造带展布。在此基础上分析了迈陈凹陷油气成藏的主控因素和有利区带、层系。指出了迈陈凹陷可分为四个次级洼陷,其中东1洼流二段烃源岩发育情况最好,其斜坡带发育有大量的构造圈闭,与迈陈凹陷成藏匹配关系良好,是迈陈凹陷下一步勘探的主要方向。  相似文献   

潮水盆地阿右旗坳陷构造特征及其演化     

李翠  房玉涛  李道勇  邵银川  孔凡杜 《山东国土资源》2011,27(11)

潮水盆地是印支运动后在阿拉善地块之上发育形成的中、新生代断拗山间盆地,其经历了早、中侏罗世断陷、晚侏罗世坳陷及以后的改造3大阶段。位于盆地西北部的阿右旗坳陷是其重要的次级构造单元,由于控制坳陷展布的断层有正断层、逆冲断层和反转断层等,故分为5块主要的次级构造单元断块。不同时代的坳陷在空间上存在翘倾叠合、叠合保存、部分叠合改造等干涉方式。研究阿右旗坳陷构造特征对该处矿产资源的开发有重要意义。  相似文献   

Assessment of Heavy Metal Contamination of Wetland Soils from a Typical Aquatic–Terrestrial Ecotone in Haihe River Basin,North China     

Rong Xiao  Junhong Bai  Qinggai Wang  Haifeng Gao  Laibin Huang  Xinhui Liu 《洁净——土壤、空气、水》2011,39(7):612-618

Surface soils were collected in the aquatic–terrestrial ecotone (ATE) of Yongnianwa wetland, downstream of Haihe River basin of North China in June of 2007. Samples were subjected to a total digestion technique before they were analyzed for total concentrations of Cr, Cu, Ni, Pb, and Zn to investigate their pollution levels in the ATE. The contamination index, integrated contamination index, geoaccumulation index, toxic units, and sum of toxic units were adopted to assess the heavy metal contamination levels and ecotoxicity, respectively. The results showed all the selected element concentrations in upland soils of the ecotone were relatively higher than those in the lowland soils. No Cr pollution was observed in all soil samples, but almost all samples were slightly polluted by Cu, Ni, Pb, and Zn except for Site 1. The contamination indexes and geoaccumulation indexes consistently presented no contamination for Site 1 and slight contamination for other sites. The ΣTUs increased from lowland to upland, but the whole level of toxicity in this ecotone was relatively low.  相似文献   

中蒙边界中东部地区奥陶纪地层划分与对比          下载免费PDF全文

唐文龙  李俊建  付超  Orolmaa 《地质找矿论丛》2015,30(4):582-587

在中蒙边界1∶100万系列地质图件编制过程中,有关中东部地区奥陶纪地层层序和时代归属问题存在一定的异议。文章根据中蒙两国1∶20万区域地质图件及生物地层学资料结合野外地质踏勘,讨论了中蒙边界中东部地区奥陶纪地层层序和时代归属。详尽的地质资料及野外踏勘显示,中蒙边界蒙古地区发育的奥陶纪地层可以和相邻地区的中国奥陶纪地层进行对比。蒙古北山地区的Ehenhaya组和Adagbaishint组下段可以和罗雅楚山组相对比;Adagbaishint上段可与咸水湖组相对比;Naransevestei组与白云山组应为同一套地层。在Saishand地区,除自中国境内延伸来的乌宾敖包组和巴彦呼舒组延伸到蒙古外,Zeeriinhural组可以与裸河组进行对比;Naransevestei组与白云山组应为同一套地层。蒙古东部Khalkh gol地区的Bukhat uul组应分为两部分,下段与多宝山组相似,其时代属于早-中奥陶世;上段可以与裸河组进行对比,时代为中-晚奥陶世。  相似文献