塔里木盆地北缘—南天山造山带盆-山耦合和构造转换   总被引：1，自引：0，他引：1       下载免费PDF全文

汤良杰  邱海峻  云露  杨勇  黄太柱  王鹏昊  谢大庆  李萌  蒋华山 《地学前缘》2012,19(5):195-204

文章探讨了塔里木盆地北缘和南天山造山带的盆-山耦合和构造转换过程。塔里木盆地属于典型的叠合盆地,经历了多期构造演化。研究表明,在地史时期中,塔里木盆地北缘和相邻南天山造山带经历了多期和复杂的盆山耦合和盆山转换过程,形成多种类型盆山耦合和转换方式。(1)按时间域可划分为:早古生代陆内裂陷盆地-早期伸展造山-晚期挤压造山耦合,晚古生代陆内裂陷盆地-弧后造山-晚期碰撞造山耦合,中生代陆内前陆盆地-挤压造山耦合,古近纪前陆盆地-挤压造山耦合,新近纪—第四纪再旋回前陆盆地-挤压造山耦合;(2)按深度域可划分为:深部地幔俯冲型盆-山耦合,地壳分层滑脱拆离型盆-山耦合,基底滑脱拆离型盆-山耦合,古生代伸展和逆冲推覆型盆-山耦合,中—新生代逆冲推覆型盆-山耦合;(3)按运动学和动力学可划分为:逆冲推覆型盆-山耦合和接触关系、重力滑脱型盆-山耦合和接触关系、走滑转换型盆山耦合和接触关系、深部岩浆上涌焊接型盆-山耦合和接触关系、鳄鱼嘴型盆-山耦合和接触关系。  相似文献   

Structural Traps in Detachment Folds: a Case Study from the ‘Comb- and Trough-like’ Deformation Zone/s, East Sichuan, China   总被引：1，自引：0，他引：1  

WANG Zongxiu  ZHANG Jin  LI Tao  ZHOU Xingui  MA Zongjin  TANG Liangjie  XIAO Weifeng  YAN Xili 《《地质学报》英文版》2012,86(4):828-841

Detachment structures occur widely in the crust, and it is the commonest and most important deformation type developed in the region between orogenic belts and basins. The ‘comb-like’ and ‘tough-like’ fold belts in eastern Sichuan are caused by multi-layer detachment. The duplex structure is the most important deformation style in the region, exhibiting different characteristics from typical detachment structures. Different deformation styles, scales, and shortenings resulting from independent deformations of various detachment systems would lead to the phenomenon whereby most of the topographical heights in the region do not correspond to the structural heights in depth. Based on systematic structural analysis and combined with practical oil/gas prospecting, four types of structural traps are described from eastern Sichuan Province, which are: detachment and thrust trap; detachment folding trap; fault-flat blocking trap; and detachment layer trap. Meticulous studies on the deformation and distribution of detachment layers in the eastern Sichuan Province will contribute to oil/gas prospecting and selection of potential regions of marine-origin oil/gas prospecting in South China.  相似文献   

柴达木盆地北缘油气分布的构造控制作用   总被引：10，自引：6，他引：10  

曾联波  由福报等 《地球科学》2001,26(1):54-58

该区中新生代形成了伸展构造、扭动构造、逆冲－褶皱构造等构造样式。早、中侏罗世形成的正断层组合构造样式，可形成一些小规模油气藏。老第三纪形成的压扭性构造对油气的聚集有重要控制作用。而新第三纪－第四纪形成的塑冲－褶皱构造的含油气性差异很大，在早期断层基础上发育的逆冲－褶皱构造有利于油气分布，而新形成的逆冲－褶皱构造，通常不利于油气聚集，构造应力对油气的运移聚集有重要影响，构造应力变化速率引起的应力驱动，是油气沿断层垂向运移的主要动力，在断层附近应力值适中、岩石扩容量较大、微裂缝发育的区域，是油气聚集的有利场所。  相似文献   

塔里木盆地库车前陆褶皱带中段盐相关构造特征与油气聚集   总被引：24，自引：2，他引：24  

汤良杰贾承造  金之钧皮学军陈书平  谢会文 《地质论评》2003,49(5):501-506

塔里木盆地北部库车前陆褶皱带古新统一始新统发育盐岩层系，将库车前陆褶皱带构造变形和圈闭样式分为三层，即盐上构造、盐层(盐间)构造和盐下构造。盐上构造包括盐上背斜、盐上逆冲断层及断层相关褶皱、盐上背冲断块构造、强制褶皱、盐上逆冲断层遮挡构造和盐推覆构造等；盐层(盐间)构造主要包括盐枕构造、盐间断褶构造、盐焊接构造和外来盐席等；盐下构造主要有背冲断块构造、断层相关褶皱、叠瓦冲断带和双重构造等。库车前陆褶皱带盐构造的形成可能受挤压作用、重力滑动和重力扩展作用多重控制。笔者等讨论了盐相关构造油气成藏条件和模式，认为库车前陆褶皱带盐岩层变形与丰富的圈闭构造形成密切相关，烃源岩主要位于盐下，盐岩层作为优质盖层构成石油和天然气藏最优越的遮挡条件，断裂对盐下、盐间和盐上油气成藏都起重要控制作用，但盐下是最有利的油气聚集场所。  相似文献   

采场底板突水相似材料模拟研究   总被引：15，自引：0，他引：15  

黎良杰  钱鸣高 《煤田地质与勘探》1997,25(1):33-36

利用相似材料模拟试验，模拟了采场底板突水机理。实验表明，在无断层构造条件下，底板在承压水作用下呈Ｏ－Ｘ型破坏，并且在Ｏ与Ｘ的交点处最容易产生突水通道；在有断层构造条件下，断层突水的实质是在承压水作用下断层两盘的关键层向上产生相对移差。当断层越易产生最大位移差时，越容易突水；在突水的同时还伴随着断层带充填的冲刷。  相似文献   

龙门山冲断带构造特征研究主要进展及存在问题探讨   总被引：25，自引：0，他引：25  

金文正  汤良杰  杨克明  万桂梅  吕志洲 《地质论评》2008,54(1):37-46

在前人研究成果基础上,对龙门山冲断带差异构造变形特征,构造几何样式,构造演化等几个方面进行了综述。研究表明,龙门山冲断带具有明显差异构造变形特征,即东西分带、南北分段、上下分层,同时发育大量构造变形样式,如断层相关褶皱、三角带、飞来峰、双重构造等等,在经历了多期复杂构造演化之后,构造变形样式具有多期叠加特征,最后提出详细地表构造地质建模、地震剖面精细解释及合理模型的建立,同时结合多种量化测试分析手段能够有效推进龙门山冲断带复杂构造样式与多期构造演化阶段分析研究工作,以及推动该地区的油气勘探。  相似文献   

Geodynamic Indications on Igneous Rocks of Transitory Geologic Setting during the Late Hercynian in North Tarim Basin     

汤良杰  黄太柱  崔泽宏  杨素举  朱毅秀  金仙梅 《中国地质大学学报(英文版)》2008,19(6):577-590

Basic and intermediate-acidic igneous rocks were developed during the late Hercynian in North Tarim basin.The geochemistry characteristics of the rocks show that basic volcanic rock has K2O/Na2O = 0.18-0.61 < 1 and falls into a category of basalt of sodium system.The rocks contain enriched large-ion lithophile elements (LILE) (K,Rb,Ba,Th) and high-field strength elements (HFSE) (Nb,Ta,Ti,Zr,P),with the magmatic material from the upper mantle.The intermediate-acidic volcanic rocks have σ = 1.91-2.96 < 3.3,K2O/Na2O =1.25-1.59 > 1,as well as the enriched LILE and depleted HFSE (Nb,Ta,Ti,P),presenting the same trace element compositions and characteristics as in the granitic rocks of South Tianshan Mt.; they are either shoshonitic igneous rocks or high-K calc-alkaline igneous rocks,with a distinct crust-derived component feature.The comprehensive analyses on the characteristics of the trace elements,the graphic tectonic discrimination,and the distribution features of the two types of igneous rocks show that they were formed under different tectonic settings and geodynamic environments:the basalt was formed in the active rifting period when the active mantle upwelling caused the thinning of lithosphere; the intermediateacidic volcanic-intrusive rock was formed in the island arc area of the active continental margin in North Tarim; the formation is associated with the plate subduction during the course of South Tianshan Ocean closure-the subduction of Middle Tianshan Mountain toward the Tarim plate.The basic and intermediate-acidic igneous rocks reveal a tectonic regime of extension-extrusion transition,which is significant in determining the key tectonic revolution period of North Tarim basin.  相似文献   

麻江古油藏周缘露头层序地层与南方海相油气藏保存条件   总被引：6，自引：0，他引：6  

向才富  汤良杰  金之钧  李儒峰  王鹏万  董立 《地质学报》2008,82(3):346-352

中国南方发育了巨厚的碳酸盐岩,由于经历了多起构造活动、多期生排烃和多幕次的油气充注和破坏,油气的保存条件是决定现今南方是否存在具有经济价值的油气藏的关键.通过对麻江古油气藏周缘野外露头层序地层学分析,识别出3种不同背景条件控制下发育的层序即缓坡型(无明显坡折)、生长断层型和陆架坡折型.通过考察层序地层与油气显示的关系,发现主要的油气显示(沥青脉)多赋存于海泛体系域直接覆盖的低位体系域或下伏层序的高位体系域中,充分说明海泛体系域是南方海相油气藏最主要的盖层.暗示南方海相油气藏勘探应重视区域性和全球性的海泛面所形成的区域盖层对油气藏的保存作用,局部海泛所形成的局部盖层不足以使油气藏在多期构造反转和抬升剥蚀中免于破坏.同时应加强构造活动中不同层序发育模式中不同体系域保存条件的差异性分析,采用不同的油气勘探战略.  相似文献   

Ecological compensation for winter wheat abandonment in groundwater over-exploited areas in the North China Plain   总被引：5，自引：1，他引：4  

Xue Wang  Xiubin Li  Liangjie Xin  Minghong Tan  Shengfa Li  Renjing Wang 《地理学报(英文版)》2016,26(10):1463-1476

The land fallow policy was adopted by central and local governments to encourage the abandonment of water-intensive crops, such as winter wheat, in groundwater over-exploited areas. At the same time, since the 1990s, many households in the North China Plain (NCP) have chosen to replace the winter wheat and summer maize double-cropping system with the spring maize single-cropping system. Therefore, it is crucial to identify target land parcels for winter wheat abandonment and to design reasonable and proper standards for ecological compensation prior to the implementation of the land fallow policy in the NCP. In this study, multi-level logit models were used with household survey data in order to detect determinants across land parcel, household and village levels on household cropping system decisions; the opportunity costs for winter wheat abandonment were also calculated using cost–benefit analysis. The results show that: (1) land quality and irrigation condition at parcel level are two essential elements influencing household cropping system decisions. Nearly 70% of the total area of poor land and more than 90% of the total area of unirrigated land has suffered winter wheat abandonment. Target land parcels for the land fallow policy should be those that are irrigated and of high quality. (2) There were no significant differences between net profits from spring maize and summer maize under similar farming conditions, and the opportunity cost for winter wheat abandonment should be equal to the net profit of winter wheat. (3) The primary purpose of the land fallow policy is to induce groundwater recovery and restoration as a preliminary stage. A higher level of 350 yuan/mu is recommended as subsidy for ecological compensation at this stage. Later, the primary purpose of the policy should be a transition to a balance between exploitation and supplementation of water resources, and a lower level of 280 yuan/mu is recommended as a subsidy at this stage.  相似文献   

特低渗透—致密砂岩成岩作用特征及其差异性分析——以鄂尔多斯盆地陇东地区延长组为例   总被引：1，自引：0，他引：1       下载免费PDF全文

庞军刚李文厚  国吉安马治国 东 玉 常梁杰 《地质科学》2021,56(1):109-120

根据大量岩石薄片观察、扫描电镜和X?衍射分析,研究陇东地区典型区块三叠系延长组长6—长8段特低渗透—致密砂岩的岩石学特征、孔隙成因等,探讨成岩作用类型及主要控制因素,剖析延长组长6与长8成岩作用的差异性。研究表明:该区砂岩经历的成岩作用主要有压实作用、胶结作用、溶解作用等,建立了三角洲和重力流成岩演化模式序列,研究区目前处于中成岩A?B期;并从储层形成的物源、沉积环境、古气候等方面的差异性,探讨了华庆区块长63和马岭区块长81成岩作用差异性的成因。由于长6较长8粒度细、杂基含量较高,其压实作用强,原生粒间孔保存较少,早期绿泥石膜胶结不发育,含铁碳酸盐胶结物及自生伊利石含量高,砂岩储层物性较差。  相似文献