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Study on the basement structure in the southeastern North China by blasting seismic

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Geodesy and Geodynamics 2018年第4期9卷 312-319页

作者： Zhenyu Fan Jinren Zhao suzhen pan Cejun Ma Mingxin Qu Yan Hai Xiaoguo Deng Geophysical Exploration Center of China Earthquake Administration Zhengzhou 450002 China

Since the Mesozoic, southeastern North China Craton has experienced intense crustal thinning and lithosphere destruction. Some of the responses of the deep activity in the upper crust crystalline basement have been retained in a series of tectonic evolution. The study of the upper crust velocity structure,especially the properties of the basement interface, is of great significance for studying the tectonic evolution and seismic hazard in the southeastern part of North China. In this study, we selected Pg waves of the blasting seismic data in the southeastern part of North China in recent years, which reflect the west Shandong uplift, offshore sedimentary basins and the Tanlu Fault zone and the Sulu orogenic transition zone, to study the structural and seismological characteristics of basement in North China Craton. The results of this study showed as follows: First, the obvious lag of Pg wave arrival time in Dongying depression and North Jiangsu basin reveals the thick sedimentary, low velocity and unstable basement structure. Second, the advance Pg wave arrival time with high apparent velocity, which reflects the basement structure of the west Shandong uplift, indicates the thin sediments and the shallow basement. Third, combined with many geophysical phenomena, such as electrical structure, density structure and terrestrial heat flow, we hold that the Tanlu tectonic belt and the Sulu orogenic belt have experienced great lithosphere destruction and there is shallow crust and the thinnest lithosphere in the vicinity of the Tanlu fault zone.

关键词： Blasting seismic detection Southeastern North China Crystalline basement Pg arrival time

Crustal velocity structures and their tectonic implications in different tectonic block regions of the Chinese mainland

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Earthquake Science 2009年第4期22卷 337-346页

作者： Xiankang Zhang Yonghong Duan Jinren Zhao Chengke Zhang Shixu Jia Jianshi Zhang Fuyun Wang Zhuoxin Yang suzhen pan Geophysical Exploration Center China Earthquake Administration Zhengzhou 450002 China

In this paper, the typical velocity structures and average velocities of the crust in six different active tectonic block regions are presented on the basis of previous studies and their tectonic implications are discussed. The results show that different tectonic units have different features of crustal velocity structures. In general, there are low velocity distributions in the crust in regions with strong tectonic activities, and the scales of low velocity distributions are related to the tectonic activities. The average velocities are relatively low in such regions. This reflects strong crustal deformation and the variations of states of matter in the crust resulting from strong tectonic movements. These regions are also seismically active zones frequented by strong earthquakes. Therefore, studying crustal velocity structures of these regions is of great importance to understanding crustal geodynamic process and seismogenic tectonic background.

关键词： tectonic block wide angle reflection and refraction experiments velocity structure crust model

Deep seismic sounding data reveal the crustal structures beneath Zoigê basin and its surrounding folded orogenic belts

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Science China Earth Sciences 2010年第2期53卷 203-212页

作者： JIA ShiXu,ZHANG XianKang,ZHAO JinRen,WANG FuYun,ZHANG ChengKe,XU ZhaoFan,pan JiShun,LIU Zhi,pan suzhen & SUN GuoWei Geophysical Exploration Center,China Earthquake Administration,Zhengzhou 450002,China Geophysical Exploration Center China Earthquake Administration Zhengzhou China

Songpan-Garze massif is located at the turning position of tectonics from the nearly west-east direction to the nearly north-south direction in the northeastern margin of Tibetan Plateau,with Zoigê basin in the centre of the *** this paper,we build a crustal structure model of Zoigê basin and its surrounding folded orogenic belts using the deep seismic sounding data in this *** also discuss structures and properties of the basement in Zoigê basin,tectonic relations between Zoigê upland basin and its surrounding folded orogenic belts,crustal deformation and thickening in the northeastern margin of Tibetan Plateau,and decoupling and relaxing processes in the *** results indicate that a special "Mesozoic basement" is formed of Triassic rocks with high density (2.65-2.75 g/cm3) and high velocity (5.6 km/s) in Zoigê ***-Garze tectonic massif was transformed into two types of tectonic units with different crustal structures,i.e.,relatively stable Zoigê upland basin and active folded orogenic belts around the basin,in the course of the crustal material of Tibetan Plateau flowing eastward and obstructed by surrounding stable *** thickening of the crust in the northeastern margin of Tibetan Plateau mainly occurred in the mid and lower crust,and the structure characterized by low velocities and multiple reflectors obviously appears in the folded orogenic belts around Zoigê *** implies that the mid and lower crust underwent a strong tectonic deformation in the folded orogenic *** thickness of the crust is about 50 km in Zoigê basin and the folded orogenic belts at the both southern and northern sides of Zoigê *** "Mountain root" cannot be *** is inferred that during the later orogenic period the eastwards flowing deep materials moved clockwise along the relatively relaxing southern side around the eastern tectonic knot under the obstructing of surrounding rigid massifs,and it resulted in the strong stretching action

关键词： Zoigê basin folded orogenic belt deep seismic sounding basement structure crustal structure and tectonics

2D multi-scale hybrid optimization method for geophysical inversion and its application

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Applied Geophysics 2009年第4期6卷 337-348,394页

作者：潘纪顺王新建张先康徐朝繁 Zhao Ping 田晓峰潘素珍华北水利水电学院郑州450011 中国地震局地球物理勘探中心中国郑州450002 PGS AustraliaPty Ltd 1060 Hay St West Perth Western Australia6005 Australia

Local and global optimization methods are widely used in geophysical inversion but each has its own advantages and disadvantages. The combination of the two methods will make it possible to overcome their weaknesses. Based on the simulated annealing genetic algorithm （SAGA） and the simplex algorithm, an efficient and robust 2-D nonlinear method for seismic travel-time inversion is presented in this paper. First we do a global search over a large range by SAGA and then do a rapid local search using the simplex method. A multi-scale tomography method is adopted in order to reduce non-uniqueness. The velocity field is divided into different spatial scales and velocities at the grid nodes are taken as unknown parameters. The model is parameterized by a bi-cubic spline function. The finite-difference method is used to solve the forward problem while the hybrid method combining multi-scale SAGA and simplex algorithms is applied to the inverse problem. The algorithm has been applied to a numerical test and a travel-time perturbation test using an anomalous low-velocity body. For a practical example, it is used in the study of upper crustal velocity structure of the A＇nyemaqen suture zone at the north-east edge of the Qinghai-Tibet Plateau. The model test and practical application both prove that the method is effective and robust.

关键词： multi-scale seismic travel-time tomography hybrid optimization method inversion A'nyemaqen suture zone

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长白山天池火山区浅部构造特征研究

地震学报 2006年第4期28卷 399-407页

作者：潘纪顺顾梦林赵成斌潘素珍中国地震局地球物理研究所中国北京100081 中国地震局地球物理勘探中心中国郑州450002

2002年在长白山天池火山区完成了10条测线的浅层地震探测和6条测线的超浅层地震探测.结果表明,在整个勘探区内存在3个稳定的浅层地层界面,个别区段的浅层地层界面多达7个,而在500m深度以下没有出现明显的反射震相.天池西南部的地层层位... 详细信息

2002年在长白山天池火山区完成了10条测线的浅层地震探测和6条测线的超浅层地震探测.结果表明,在整个勘探区内存在3个稳定的浅层地层界面,个别区段的浅层地层界面多达7个,而在500m深度以下没有出现明显的反射震相.天池西南部的地层层位个数明显多于天池西北部,这表明天池西南部的断层对火山喷发熔岩流向较天池西北部的断层有更强的控制作用.探测中发现6条浅部断层,这些断层大都近于直立,成地堑式,多分布在天池火山口的西南侧,这说明天池西南部的火山活动比天池西北部更为强烈,从而推测天池火山的主控断裂即北东向的六道沟—天池—甑峰山断裂比北西向的白山镇—天池—金策断裂的活动性更强.

关键词：天池火山地震勘探浅部构造地层断层

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在中职VB教学中培养学生编程能力

职业技术 2018年第7期17卷 94-96页

作者：潘素珍河南省项城市中等专业学校河南项城466200

目前,对于大多数就读于中职计算机专业的学生来说,独立完成程序设计是他们的学习难题,导致其在编写程序时往往遇到困难。经相关调查研究,总结出以下两方面因素:第一,尽管各中职院校将VB作为中职计算机专业的主要教学语言,但却忽略了对... 详细信息

目前,对于大多数就读于中职计算机专业的学生来说,独立完成程序设计是他们的学习难题,导致其在编写程序时往往遇到困难。经相关调查研究,总结出以下两方面因素:第一,尽管各中职院校将VB作为中职计算机专业的主要教学语言,但却忽略了对学生实践能力的培养;第二,学生本身缺乏学习信心,程序编写的难度高,无法在VB程序学习中独立解决问题。

关键词：中职 VB教学编程能力

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天然地震识别与震相自动拾取技术进展

中国地震 2018年第4期34卷 606-620页

作者：孙印潘素珍刘明军中国地震局地球物理勘探中心郑州市文化路75号450002

震相拾取是地震数据处理过程中最基本的步骤之一。在传统的人工拾取技术不能满足庞大的地震数据处理需求的情况下,震相自动拾取技术从产生到发展至今经历了漫长的过程。本文回顾并总结了震相自动拾取技术的发展状况,重点介绍了长短时窗... 详细信息

震相拾取是地震数据处理过程中最基本的步骤之一。在传统的人工拾取技术不能满足庞大的地震数据处理需求的情况下,震相自动拾取技术从产生到发展至今经历了漫长的过程。本文回顾并总结了震相自动拾取技术的发展状况,重点介绍了长短时窗法、赤池准则法、模板匹配技术、基于自相关盲搜索的FAST法、S波偏振分析法、人工智能方法等,以及近年发展起来的多频率震相识别、全波形叠加、二次方自回归模型等方法,同时分析了每种方法的优势和局限性。

关键词：震相自动拾取长短时窗赤池准则模板匹配神经网络 FP方法

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中药复方洁肤净洗剂中粉防己碱的含量测定

现代医院 2010年第11期10卷 79-80页

作者：潘素珍周辉新丰县中医医院广东新丰511100

目的建立复方洁肤净洗剂中粉防己碱的含量测定方法。方法采用薄层扫描法,薄层板:硅胶G薄层板,展开剂:氯仿-甲苯-乙醇-浓氨水(10∶5∶2∶0.5),显色方法:稀碘化铋钾溶液显色。结果粉防己碱在1.0～4.0μg范围内呈现良好的线性关系。平均回... 详细信息

目的建立复方洁肤净洗剂中粉防己碱的含量测定方法。方法采用薄层扫描法,薄层板:硅胶G薄层板,展开剂:氯仿-甲苯-乙醇-浓氨水(10∶5∶2∶0.5),显色方法:稀碘化铋钾溶液显色。结果粉防己碱在1.0～4.0μg范围内呈现良好的线性关系。平均回收率为102.1%,RSD为1.0%。结论此方法准确、可靠,可用于复方洁肤净洗剂中粉防己碱的含量测定。

关键词：复方洁肤净洗剂粉防己碱薄层扫描法

维普期刊数据库博看期刊

Study on Crustal Structure in Haiyuan Strong Earthquake Region

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Earthquake Research in China 2001年第3期15卷 230-238页

作者： Li Songlin,Zhang Xiankang,Zhang Chengke,Ren Qingfang,Shi Jinhu,Zhao Jinren,Fang Shengming,Liu Baofeng,pan suzhen, and Zhang Jianshi Research Center of Exploration Geophysics, CSB, Zhengzhou 450002 , China Research Center of Exploration Geophysics CSB Zhengzhou 450002 China

The crust/upper-mantle velocity structure and deep tectonic features are obtained in Haiyuan M = 8. 5 earthquake region from data processing of Xiji-Zhongwei deep seismic sounding (DSS) profile. The result shows that there is a great difference between the velocity structures on the two sides of the epicenter. The crust consists of alternative high and low velocity layers on the southern side while on the northern side it consists of a series of layers with positive velocity gradient. There exists a deep fault cutting Moho or an anomalous deep structural zone in the epicentral region.

关键词： Haiyuan earthquake Crustal structure Deep crustal fault Anomalous structural zone.