谭庄-沈丘凹陷油气形成条件分析及勘探思路   总被引：2，自引：0，他引：2  

金维平  付代国  张庆甫 《西北地质》2009,42(1):105-114

谭庄-沈丘凹陷位于周口坳陷中部凹陷带,是一个中、新生代两期断陷叠合的次级构造单元,面积近2800km^2。勘探证实凹陷内沉积了巨厚的中生代早白垩纪地层（分布面积2000km^2）,其中暗色泥岩平均厚达1250m,在多口探井中见到级别不同、层数不一、厚度不等的油气显示,并在周参10、周11、12、19等多口井见到油气流,显示了该凹陷良好的勘探前景;但至今仍未取得实质性的突破,表明它具有一定的复杂性。究其原因,除了生油岩类型不太理想外,后期改造强烈导致保存条件较差及所采用的技术方法不过关也是非常重要的因素。如何寻找改造弱、破坏小、保存好的构造,是下一步勘探突破的重点,而先进适用的技术方法是关键因素。  相似文献   

东准噶尔库布苏南岩体中闪长质包体特征及地质意义   总被引：1，自引：0，他引：1  

杨高学  闫存兴  李永军  金朝  吴宏恩  司国辉  夏昭德 《地质科技情报》2009,28(1)

新疆东准噶尔卡拉麦里地区库布苏南晚古生代后碰撞准铝质过铝质花岗闪长岩体中广泛发育大量的暗色微粒闪长质包体.岩石学、矿物学、主量元素和微量元素地球化学研究表明,包体在地球化学特征上表现为与寄主花岗岩既相互联系又受其制约.库布苏南花岗闪长岩体具有低锶初始比值I(Sr)和正εNd(t)值,表明花岗岩的来源有地幔物质参与,而大量发育的暗色微粒闪长质包体是壳幔岩浆混合作用最直接的证据,微粒包体是基性源岩部分熔融作用形成的残余体.与准噶尔碱性花岗岩一样,载荷包体的准铝质过铝质花岗岩是晚古生代后碰撞阶段构造岩浆活动的岩石类型之一,其形成和演化标志了准噶尔地区后碰撞幔源岩浆底侵作用导致大陆地壳垂向生长的过程.  相似文献   

Structural Evolution of the Eastern Qiulitagh Fold and Thrust Belt,Northern Tarim Basin,China   总被引：4，自引：3，他引：1  

YANG Minghui  JIN Zhijun  LU Xiuxiang  SUN Dongsheng  TANG Xuan  PENG Gengxin  LEI Ganglin 《《地质学报》英文版》2009,83(2):347-358

The eastern Qiulitagh fold and thrust belt (EQFTB) is part of the active Kuqa fold and thrust belts of the northern Tarim Basin. Seismic reflection profiles have been integrated with surface geologic and drill data to examine the deformation and structure style of the EQFTB, particularly the deformational history of the Dina 2 gas field. Seismic interpretations suggest that Dongqiu 8 is overall a duplex structure developed beneath a passive roof thrust, which generated from a tipline in the Miocene Jidike Formation, and the sole thrust was initiated from the same Jidike Formation evaporite zone that extends westward beneath the Kuqatawu anticline. Dongqiu 5 is a pop-up structure at the western part of the EQFTB, also developed beneath the Jidike Formation evaporite. Very gentle basement dip and steep dipping topographic slope in the EQFTB suggest that the Jidike Formation salt provides effective decoupling. The strong deformation in the EQFTB appears to have developed further south, in an area where evaporite may be lacking. Since the Pliocene, the EQFTB has moved farther south over the evaporite and reached the Yaken area. Restoring a balanced cross-section suggests that the minimum shortening across the EQFTB is more than 7800 m. Assuming that this shortening occurred during the 5.3 Ma timespan, the shortening rate is approximately 1.47 mm/year.  相似文献   

Permian High Ba-Sr Granitoids: Geochemistry, Age and Tectonic Implications of Erlangshan Pluton, Urad Zhongqi, Inner Mongolia   总被引：1，自引：0，他引：1  

LUO Hongling  WU Tairan  ZHAO Lei  HE Yuankai  JIN Xu 《《地质学报》英文版》2009,83(3):603-614

Abstract: Erlangshan Pluton from Urad Zhongqi, central Inner Mongolia, is located in the middle segment of the northern margin of the North China Plate. The rocks consist mainly of diorites with gneissic structure. Petrochemical characteristics reveal that the diorites belong to metaluminous, high-potassium calc-alkaline series, with chemical signatures of I-type granites. They are characterized by low SiO2 contents (56.63%–58.53%) and A/CNK (0.90–0.96), high Al2O3 contents (17.30%–17.96%) and Na2O/K2O ratios (1.20–1.70), enrichment in large ion lithophile elements (LILE, e.g., Ba=556–915 ppm, Sr=463–595 ppm), and relative depletion in high field strength elements (HFSE, e.g., Nb, Ta, Ti) in primitive mantle-normalized spidergram, and right-declined rare earth element patterns with slightly negative Eu anomalies (d?Eu=0.72–0.90). They have Sr/Y ratios (20–25) evidently less than Kebu Pluton (49–75) to its east. Sensitive high resolution ion micro-probe U-Pb zircon dating of the diorites has yielded an intrusive age of 270±8?Ma. This leads us to conclude that Erlangshan diorites were formed by mixing between the middle or lower crustal-derived magma and minor mantle-derived mafic magma, followed by fractional crystallization, which was trigged by crustal extension and fault activity in post-collisional setting.  相似文献   

Application of 3-D Geoscience Modeling Technology for the Estimation of Solid Mineral Reserves   总被引：1，自引：0，他引：1  

PAN Mao  LI Jun  WANG Zhangang  JIN Jiangjun 《《地质学报》英文版》2009,83(3):655-660

Abstract: Applying new approaches, methods, and technologies for the estimation of reserves can effectively improve the efficiency and accuracy of assessments of solid mineral resources. After analyzing the development of 3-D geoscience modeling technology (3-D GMT), this paper discusses the application of 3-D GMT for the estimation of solid mineral reserves, emphatically introducing its workflow and two key technologies, 3-D orebody surface modeling, and property modeling. Moreover, the paper analyzes the limitations of traditional methods, such as the section method and geological block method, and points out the advantages of 3-D GMT: building more accurate 3-D orebody models, expressing the internal inhomogeneous attributes of an orebody, reducing the potential for errors in the estimation of reserves, and implementing dynamic estimations of reserves.  相似文献   

基于VC++6.0实现计算机与全站仪通讯   总被引：3，自引：0，他引：3  

靳海亮  赵长胜  周兴东  韩奎峰 《测绘通报》2005,(7):17-20

为解决测量工作中计算机与全站仪的数据通讯问题,在VC 6.0中使用串行通讯控件ActiveX实现计算机与全站仪的数据通讯及生成成图软件所要求的坐标展点格式文件的方法,并给出较为详细实用的实例程序,可在此基础上进行功能扩充,编写成全站仪和成图软件之间的通用接口软件.  相似文献   

一种快速角点探测算子研究   总被引：3，自引：0，他引：3  

何凯  安如  周绍光  金夏玲 《测绘学报》2005,34(3):223-227

基于SUSAN和角点几何结构分析的思想提出一种改进的快速角点探测算子.首先进行角点粗探测,然后再对粗探测的结果进行角点几何结构分析,即图像中的像元如果为角点,它必须满足角点的圈层结构.通常认为角点处各个方向上灰度差变化都较大,所以角点响应函数采用反映角点突出性的响应函数,使提取的角点含有更高的信息量.实验证明,本算法提取的角点定位准确,快速有效,可以适用于实时图像处理.  相似文献   

远洋渔船动态监控系统研究   总被引：5，自引：0，他引：5  

季民  靳奉祥  李云岭  邵全琴 《测绘科学》2005,30(5):92-94

针对远洋渔业生产中的渔船监控问题,以卫星通讯、GIS、GPS、数据库等技术手段为支撑,进行了远洋渔船GPS动态监控系统的研究和开发工作。本文在介绍了系统总体框架的基础上,系统阐述了通讯文件的解包和数据质量的控制过程,并对渔船的动态监视和轨迹分析功能进行了论述。  相似文献   

基于虚拟土理念的中国耕地资源价值核算初探   总被引：2，自引：0，他引：2  

赵新新  金晓斌  周寅康 《地理与地理信息科学》2013,29(3)

在经济高速发展带来土地资源日趋紧张的形势下,深化对耕地资源价值的认识,有助于实现耕地资源空间布局优化和耕地市场化流转.该文在明确虚拟土内涵与类型划分的基础上,从经济、社会和生态价值属性出发,运用收益还原法、替代法等方法,以省级为单位,分别测算了中国产能虚拟土、资源虚拟土和生态虚拟土价值,通过SPSS聚类分析和GIS空间分析,从虚拟土角度分析我国耕地资源价值的空间分布差异.研究结果表明,产能虚拟土得分最高的广东省是得分最低的内蒙古自治区的8.94倍;资源虚拟土得分最高的上海市是得分最低的黑龙江省的96.10倍;生态虚拟土得分最高的上海市是得分最低的贵州省的9.25倍.在空间分布上,产能虚拟土与纬度气候带分布基本一致,资源虚拟土分布受经济影响较大,而生态虚拟土分布则受气候和经济因素共同作用.  相似文献   

大地电磁测深中大地电场的高精度采集技术     

王辉  叶高峰  魏文博  金胜  张巍 《地球物理学进展》2013,28(3):1199-1207

大地电磁测深需要采集正交的天然电磁场信号,其中大地电场信号微弱且易受环境噪声影响.为了提高大地电场的测量精度,本文通过试制新型Pb-PbCl2不极化电极和改变电极的掩埋方式,室内和野外对比实验结果表明:试制电极具有级差小、稳定时间长的优点;采用加桶加水的方式掩埋电极,不仅可以提高电极极差的稳定性,还有利于减小电极极差突变的机率;电极掩埋深度对电极的稳定性影响很大,深埋电极可以有效抑制电极极差的漂移.另外,野外大地电磁数据采集时难免会遇到了一些沙漠、河流等特殊地形,采用传统的测量方式无法采集到精确的大地电场信号,本文通过对比实验,总结了在特殊地形条件下大地电磁信号采集的技术要点,如在沙漠地区,电极坑中应加入大量泥浆以减小电极的接地电阻,当测点在河流附近时,电极对不应跨过河面,减小自然电位对大地电场的影响.  相似文献