检索结果-南通市图书馆

Joint exploration of crustal structure in Fuzhou basin and its vicinities by deep seismic reflection and high-resolution refraction as well as wide-angle reflection/refraction

引用

Science China Earth Sciences 2005年第7期48卷 925-938页

作者： ZHU Jinfang1. XU Xiwei2, ZHANG Xiankang3. HUANG Zonglin1. CHEN Xiangxiong1. FANG Shengming3. LIU Baojin3. ZHENG Rongzhang2,4.1. Seismological Bureau of Fujian Province,Fuzhou 3.0003.China 2. Institute of Geology,China earthquake Administration,Beijing 1.0029,China {1.,China earthquake Administration,{3.,China 4. State Key Laboratory of earthquake Dynamics,Institute of Geology,China earthquake Administration,Beijing 1.0029,China Seismological Bureau of Fujian Province Fuzhou 350003 China Institute of Geology China Earthquake Administration Beijing 100029 China research {1. for exploration {3. China Earthquake Administration Zhengzhou 450002 China State Key Laboratory of earthquake Dynamics Institute of Geology China Earthquake Administration Beijing 100029 China

The Fuzhou basin and its vicinities are located at the northern end of the southeastern coastal seismic zone of the mainland of China. By the joint explorations of high-resolution seismic refraction and wide-angle reflection/refraction as well as deep seismic reflection in the region, which is the first synthetic profile in China, its fine velocity structure and geometric structure from the ground to Moho discontinuity is obtained. The result shows that the crust is obviously layered with a thickness of about {1. km. Basically, it consists of two parts: upper crust and lower crust. The velocity of the upper crust is 5.9-6.2 km/s in which there is a {1.4.km-thick weak low-velocity layer between the depths of 1.-1. km, while the velocity of the lower crust in the range of 6.{1.7.2 km/s. There exists a strong velocity gradient layer about {1.km thick above the Moho discontinuity whose velocity increases from 6.5 to 7.27 km/s. There exist high-angle normal faults that are small in size and extend only in the shallow crust. These faults are the secondary developed on the hanging wall of westward dipping low-angle normal faults. Thus, their seismogenic ability is limited, however, there exists a high-angle deep fault in the crust from Changle-Zaoan fault zone to seashore fault zone. This deep fault has cut the interface between the upper and lower crusts and Moho discontinuity, and may be the deep structure to trigger destructive {1. source in future to affect Fuzhou City. These results have advanced the detecting precision of the deep structure in the southeastern coastal seismic zone of the mainland of China. In the aspect of the combined feature of the deep and shallow extensional structures that consist of the westward dipping low-angle normal faults and secondary normal faults on their hanging walls in the upper crust, it is firstly obtained that a united structural interpretation has deepened the knowledge about the deep dynamic process in the southeastern coasta

关键词： deep seismic reflection high-resolution seismic refraction wide-angle.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A finite difference study on the basement structure beneath the Tianshan Orogen

引用

Science China Earth Sciences 2004年第Z2期47卷 16-23页

作者： ZHAO Junmeng1.2, WANG Qingchen3. GAO Xing1. DUAN Yonghong4. JIA Shixu4.& PAN Shuzhen4.1. Institute of Tibetan Plateau {1., Chinese Academy of Sciences, Beijing 1.0085, China 2. Institute of Geology, China Seismological Bureau, Beijing 1.0029, China 3. Institute of Geology and {1., Chinese Academy of Sciences, Beijing 1.0029, China 4. Geophysical exploration {3., China Seismological Bureau, Zhenzhou 4.0002, China Institute of Tibetan Plateau research Chinese Academy of Sciences Beijing 100085 China Institute of Geology China Seismological Bureau Beijing 100029 China Institute of Geology and geophysics Chinese Academy of Sciences Beijing 100029 China Institute of Tibetan Plateau research Chinese Academy of Sciences Beijing 100085 China Geophysical exploration {1. China Seismological Bureau Zhenzhou 450002 China

We use the Pg seismic phase along the Korla-Jimsar profile across the Tianshan orogen and the 3. finite difference method to inverse the velocity structure of the upper crust beneath the basement of this mountain. Based on the velocity structure, the Korla-Jimsar profile can be divided into three parts, i.e. the north edge of the Tarim basin, the Tianshan orogen, and the south margin of the Junggar basin. Within the Tianshan there is a pattern of four convexities and three concavities, which correspond to the southern Tianshan, the Yanqi basin, the middle Tianshan, the Turpan basin, and the Bogda Mountains. In the north edge of the Tarim basin, the basement is about 1.km deep with small lateral variations of velocity. In the Tianshan the velocity varies greatly laterally. The basement depth of the Yanqi basin is 6 km, which becomes shallow rapidly northward, and almost to the surface at the middle Tianshan. South to Kumux there is a small intermountain basin, where the maximum basement depth is 3.km, and also turns very shallow near Kumux. The Luntai fault, which bounds the Tarim basin and Tianshan, has vertical dislocation of about 5 km. The Turpan basin is covered with so thick a sediment that its basement is 7 km deep. The boundary fault between the Tianshan and Turpan is the Bolohoro fault which is characterized by quick deepening basement and 7 km vertical dislocation. In the Junggar basin the basement is 8 km deep. On the Korla-Jimsar profile, the velocity distribution of the upper crust and the structure are featured by NS symmetry on both sides of the axis of the Middle Tianshan, consistent with the deep structure revealed by this profile. It means that the Tarim ba-sin and the Junggar basin underthrust toward the Tianshan from south and north, respectively. Such a structural style is different from that of another profile, i.e. the Xayar-Burjing profile, sug-gesting that there may be an important tectonic boundary between these two profiles.

关键词： finite difference, Tianshan orogen, structure of the upper crust.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The Crust-mantle Structure and Seismic Risk in Tangyin Graben and Its Adjacent Area

引用

earthquake {1. in China 1998年第4期12卷 66-76页

作者： Ren Qingfang, Zhang Xiankang, Zhang Chengke, Zhao Jinren, and Zhou Xuesong research {1. of exploration {3., CSB, {4., China

1.D and 2-D calculation and interpretation are carried out with the DSS data from the western section of Heze-Changzhi profile and the southern section of zhengzhou-Jinan profile. 2-D velocity structure is determined in Tangyin graben and its adjacent area. The result shows that velocity structure of the crust and upper mantle is obviously different in vertical and lateral directions. Crustal thickness varies apparently in this area, and there are local low velocity blocks in the interior crust. The swelling M-discontinuity corresponds to Tangyin graben and Moho depth at the highest swelling position is {1. km. Toward the east, its depth gradually increases to {1. km in Xunxian swelling; toward the west, M-discontinuity becomes a steep zone at the piedmont uplift of Taihang Mountain and reaches 4. km at depth near Changzhi. Through analyzing the relationship between historical {4.s and deep structure in North China, we infer that seismic risk exists in Tangyin graben and its adjacent area.

关键词： Tangyin graben and its adjacent area Crust/mantle structure Seismic risk.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The Activity of Major Faults and the Hydrothermal Alteration Zone at Tianchi Volcano of Changbaishan

引用

earthquake {1. Advances 2004年第3期000卷 45-54页

作者： Liu Mingjun 1., Gu Menglin 1., Sun Zhenguo 1., Wei Haiquan 2) and Jin Bolu 3. 1. Geophysical {1. {1., CEA, zhengzhou 4.0002, China 2) Institute of Geology, CEA, Beijing 1.0029, China 3. The No.6 Geological Survey of Geological and Mineral Resource Administration of Jilin Province, Yanji 1.0}001. Jilin, China Geophysical exploration {1. CEA Zhengzhou 450002China Institute of Geology CEA Beijing 100029China The No.6 Geological Survey of Geological and Mineral Resource Administration of Jilin Province Yanji 133001JilinChina

It is found by field investigation that the near horizontal top surface of the brown or brick-red hydrothermal alteration zone varies obviously in elevation at different sections of the same layer on the caldera’s inner wall of Tianchi, with that at the north section near the Tianwen Peak about 1.0 m higher than that at the south near the Jiangjun Peak in Korea. The top surface of the hydrothermal alteration zone can be taken as key horizon to tectonic movement. The difference indicates that the total uplift height of the NW wall of the Liudaogou-Tianchi-Jingfengshan fault, the principal fault trending NE at Tianchi, is bigger than that of the SE wall ever since the occurrence of hydrothermal alteration. This also explains why the topography in the northwest side of Tianchi is steeper and with more developed river system than in the southeast. The uplifting of the northeastern wall is bigger than that of the southwest along the principal NW-trend fault, namely, the Baishanzhen-Tianchi-Jince fault. It is observed from characters of hydrothermal alteration and the palaeoresiduum, that the recent vertical movement rate along the principal NE-trend fault is larger than that of the principal NW-trend fault. The two faults intersect at Tianchi, dividing the volcano into 4.blocks, with the uplift magnitudes decreasing successively in the order of the north, the west, the east and the south block. The biggest uplift of the north block corresponds well to the shallow magma batch in the north of Tianchi observed by DSS and telluric electromagnetic sounding, and etc. and they may be related with the causes.

关键词： Tianchi volcano Major fault Caldera’s inner wall Hydrothermal alteration Different uplift

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

The Crust-Mantle Structure in Zhangbei-Shangyi earthquake Area

引用

earthquake {1. in China 1999年第4期13卷 59-68页

作者： Zhu Zhiping, Zhang Jianshi, Zhang Xiankang, Zhang Chengke, Liu Mingqing, and Nie Wenyingresearch {1. of exploration {3., CSB, {4., China

The seismic data obtained from the wide angle reflection and refraction profiles that pass through Zhangjiakou area of Hebei Province were interpreted. Some conclusions drawn from the result are as follows: (1. The nearly EW-trending Zhangbei-Chongli crustal fault zone and WNW-trending Zhangjiakou-Bohai Sea deep crustal fault zone meet in the Zhangbei earthquake (Ms = 6.2) area; (2) At the intersection, the two deep crustal fault zones that stretch to the Moho and the discontinuities of interfaces within the crust form the path for large area basalt eruption in Hannuoba; ({1. In the earthquake area, the local velocity reversal in the middle-upper crust and abnormal low velocity zone in the lower crust imply that the magmatic activity there is still fairly violent; and (4. The recent activity of Zhangjiakou-Bohai Sea deep crustal fault zone may be the main cause of the Zhangbei earthquake.

关键词： Zhangbei and adjacent area crust-upper mantle velocity structure deep crustal fault wide angle reflection and refraction.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

黄骅坳陷第三系油气成藏体系定量评价

引用

石油与天然气地质 2004年第5期25卷 544-547,602页

作者：陈善勇金之钧刘小平中国科学院地质与地球物理研究所中国石化石油勘探开发研究院北京100083 石油大学盆地与油藏研究中心北京102249

根据油气成藏体系概念和层次分析法基本原理 ,将黄骅坳陷第三系划分为 4.成藏体系和 1.个亚成藏体系 ,初步建立了成藏体系的定量评价方法。优选出烃源体、输导体和圈闭体所涉及的 2 2个地质单因素 ,包括有机碳含量、有机质类型、成熟... 详细信息

根据油气成藏体系概念和层次分析法基本原理 ,将黄骅坳陷第三系划分为 4.成藏体系和 1.个亚成藏体系 ,初步建立了成藏体系的定量评价方法。优选出烃源体、输导体和圈闭体所涉及的 2 2个地质单因素 ,包括有机碳含量、有机质类型、成熟度、源岩厚度、供烃面积系数及生烃强度、断层、储层、不整合面及其空间组合等 ,定量评价了黄骅坳陷成藏体系和亚成藏体系的元素及成熟度。结果表明 ,黄骅坳陷 4.成藏体系的烃源体、输导体和圈闭体三元素存在明显的差异 ,中部歧北成藏体系各元素发育条件最好 ,其次是中部歧南成藏体系 ,南部成藏体系较差 ,北部成藏体系最差。中部歧北成藏体系和中部歧南成藏体系成熟度较高 ;南部成藏体系和北部成藏体系成熟度较低。

关键词：成藏体系元素成熟度定量评价黄骅坳陷第三系

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

^(4.)Ar-^(3.)Ar thermochronology of two ductile shear zones from Yiwulüshan,West Liaoning Region: Age constraints on the Mesozoic tectonic events

引用

Chinese Science Bulletin 2002年第13期47卷 1113-1118页

作者： ZHANG Xiaohui, LI Tiesheng & PU Zhipingresearch {1. of Mineral Resources exploration, Institute of Geology and {3., Chinese Academy of Sciences, Beijing 1.01.1. China Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 51 research {1. of Mineral Resources exploration Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou China

Two ductile shear zones trending EW and NNE respectively not only controlled the tectonic framework of the northern North China, but also constrained the geody-namic background for gold mineralization in this region. Field observations and microstructural analyses reveal that the EW trending ductile shear zones are mainly contributed to dextral compressional deformation resulting from top-to-the-southeast oblique thrust shearing, whereas the NNE trending ones are genetically related to sinistral strike-slip and extensional faulting. One sample from the former yielded an 4.Ar-3.Ar plateau age of (21.±4. Ma (Bi) and two samples from the latter gave 4.Ar-3.Ar plateau ages of (1.6± 2) Ma (Bi) and (1.7±3. Ma (Bi). These ages provide constraints on the top-to-the-southeast oblique thrusting event occurring in Late Triassic and the sinistral extensional and strike-slip faulting event which occurred in Early Cretaceous.

关键词： 4.Ar-3.Ar age biotite ductile shear zone West Liaoning Region.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

福山凹陷下第三系流沙港组沉积体系及演化特征

引用

石油与天然气地质 2003年第2期24卷 140-145页

作者：刘丽军旷红伟佟彦明王赟中国地质大学能源系北京100083 江汉石油学院地球物理系湖北荆州434023 中国海洋石油研究中心南海西部研究院广东湛江524057 中国科学院地质与地球物理研究所北京100101

运用地质、测井、地震及岩芯等综合方法 ,对福山凹陷下第三系流沙港组的沉积体系进行了研究。流沙港组主要发育辫状河三角洲相和湖泊相两种沉积体系。根据沉积环境和沉积物特征 ,将辫状河三角洲沉积相划分为辫状河三角洲平原亚相、辫状... 详细信息

运用地质、测井、地震及岩芯等综合方法 ,对福山凹陷下第三系流沙港组的沉积体系进行了研究。流沙港组主要发育辫状河三角洲相和湖泊相两种沉积体系。根据沉积环境和沉积物特征 ,将辫状河三角洲沉积相划分为辫状河三角洲平原亚相、辫状河三角洲前缘亚相和前辫状河三角洲亚相。其中以三角洲前缘亚相为沉积主体 ,其内沉积构造丰富 ,侧积交错层理发育。湖泊相沉积体系也可划分为 4.亚相 ,即浅湖亚相、半深湖亚相、深湖亚相及湖底扇亚相。其中湖底扇亚相比较发育 ,特点是扇相砂体、砂砾岩体与深水泥岩页岩间互出现 ,垂向上表现为推进式复合叠置、向上变厚变粗的层序。流沙港组自盆地中心至盆地边缘的沉积模式为湖底扇—深湖—半深湖—三角洲前缘—三角洲平原。沉积物源主要来自福山凹陷的南部。流沙港组二段发育一大套黑色泥岩 ,为主要生油岩层和盖层 ,流沙港组三段和一段南部的辫状河三角洲前缘亚相带为储集性能较好的厚层砂体 ,从而使该组构成了良好的生储盖配置关系 ,因此流沙港组是福山凹陷值得进一步勘探的有利层位。

关键词：沉积体系沉积模式演化特征流沙港组下第三系福山凹陷

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Investigation of igneous rocks in Huanghua depression,North China,from magnetic derivative methods

Investigation of igneous rocks in Huanghua depression,North ...

引用

中国科学院地质与地球物理研究所第1.届（201.年度）学术年会

作者： Ya Xu~(1.4.,Tianyao Hao~1.Baimin Zhao~(1.2),Zhou Lihong~3.Lili Zhang~1. Zhiwei Li~1.and Song Huang~1.~1.ey Laboratory of Petroleum Resources {1.,Institute of Geology and {1.,Chinese Academy of Sciences,Beijing 1.0029,People’s Republic of China ~2 China Aero Geophysical Survey and Remote Sensing center for Land and Resources,Beijing 1.0083. People’s Republic of China ~3.0} Institute of exploration and Development,Dagang Oil field,Tianjin 3.0280,People’s Republic of China

The igneous rock study plays an important role in understanding the tectonic evolution of sedimentary *** distribution of igneous rocks is one of the basic aspects in the igneous rock *** on the magnetic susceptibility contrast of igneous and other rocks,magnetic methods are usually used in the igneous rock *** this paper,we delineated the distribution of igneous rocks in Huanghua depression based on the reduction to pole(RTP) magnetic anomaly and its derivative processing *** main methods used to enhance the anomaly character of igneous rocks include total horizontal derivative,analytic signal modules and the tilt *** on the RTP anomaly and the derivative results,three types of igneous rock distribution areas are predicted in Huanghua *** large scale igneous rocks are mainly distributed in the north part of Huanghua *** string bead-shaped igneous rocks are mainly located in the north and southwest *** craters are located in the middle-south *** distribution of igneous rocks is controlled by the deep buried fault along the coastal boundary and the associated tertiary *** study verified the validity of the magnetic derivative methods for the planar distribution study of igneous *** study results of Huanghua depression are the basis of the seismic interpretation of igneous rocks and the tectonic study in this area.

关键词： magnetic anomaly igneous rocks magnetic derivative methods Huanghua depression

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

合肥盆地与北淮阳构造带印支期的推覆构造及其油气意义

引用

石油与天然气地质 2003年第2期24卷 116-122页

作者：曹高社李学田刘德良周松兴高一军郑州大学地球科学中心中国科学技术大学地球与空间学院安徽合肥230026 胜利油田地质研究院中国科学技术大学地球与空间学院江苏石油勘探局安徽勘探处

在分析合肥盆地钻测井和地震等地球物理资料的基础上 ,对北淮阳构造带推覆构造进行了研究 ,确定了印支期推覆构造的存在 ,探讨了印支期推覆构造的模式、动力学背景和油气意义。认为 ,印支期合肥盆地与北淮阳构造带组成统一的推覆构造系... 详细信息

在分析合肥盆地钻测井和地震等地球物理资料的基础上 ,对北淮阳构造带推覆构造进行了研究 ,确定了印支期推覆构造的存在 ,探讨了印支期推覆构造的模式、动力学背景和油气意义。认为 ,印支期合肥盆地与北淮阳构造带组成统一的推覆构造系统 ,其动力学背景是华北陆块深部地壳向造山带内部的陆内俯冲。印支期构造运动为典型的大陆内部构造 ,并非经“B”式俯冲形成的碰撞造山运动。印支期逆冲推覆构造对油气的保存是有利的。

关键词：推覆构造陆内俯冲合肥盆地北淮阳构造带

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：