塔南凹陷岩性油藏成藏条件与4种成藏模式   总被引：1，自引：0，他引：1       下载免费PDF全文

刘绍军  李强  李红英  张湘娟  王立东 《地质科学》2011,46(4):1106-1118

本文分析了塔南凹陷岩性油藏的成藏条件,结果表明,开阔的复式箕状断陷结构使塔南凹陷形成了多凸多凹、凹隆相间的构造格局,为岩性油藏的形成创造了有利的空间;南屯组多沉积中心发育的优质烃源岩为岩性油藏发育提供了物质基础;同沉积断裂及其配置关系决定了塔南凹陷具有沟谷控源、转换带控扇、断坡控砂的成盆特点,水下扇中扇,三角洲前缘和远...  相似文献   

山西地区近期垂直形变场分析   总被引：2，自引：0，他引：2  

王秀文  郭跃宏  范雪芳 《大地测量与地球动力学》2001,21(2):64-69

利用山西及太原地区最新的 5 0年尺度的形变资料 ,分析、研究了区域形变场及其时空演化特征 ,认为山西地堑系的垂直形变场反映出其周围山区及次级隆起主要表现为持续上升 ,盆地主要呈趋势下降的总体特征。太原地区的地面沉降主要是由超量开采地下水引起的 ,南部地区的沉降速率大于北部。地堑系内这种垂直形变场的态势 ,说明本区构造的垂直差异活动既有继承性、又有新生性的特点。  相似文献   

"喀斯特断陷盆地关键带与生态地质"专辑特邀主编寄语     

曹建华 《地球学报》2021,42(3):309-312

自第三纪以来,康滇地块的地壳运动十分活跃,形成了喀斯特断陷盆地.由于该区"盆-山"地形变化剧烈,山地气候反差大;而西南季风的控制,使得该地区旱季是雨季的2倍,水资源的时空分配不均,土壤流/漏失严重,植被立地条件差,以至于石漠化问题缓解不明显.2016—2020年,在该区实施了国家重点研发计划典型脆弱生态修复与保护专项项目"喀斯特断陷盆地石漠化演变及综合治理技术与示范",为我们了解喀斯特断陷盆地关键带与生态地质特征、总结已实施石漠化综合治理工程成果提供了条件.在《地球学报》编辑部的大力支持下,从4个方面"水资源、水土流失、生态地质、生态服务",15篇文章构成"喀斯特断陷盆地关键带与生态地质"专辑,专辑并没有包括专项项目的全部内容,但对深入了解喀斯特断陷盆地的地质、气候、水文、生态和生态服务功能提供重要的参考价值.  相似文献   

藏南邛多江地堑的晚新生代沉积地层及对南北向裂谷形成时代的初步限定   总被引：3，自引：0，他引：3  

哈广浩  吴中海  何林 《地质学报》2018,92(10):2051-2067

邛多江地堑构成了藏南近南北向裂谷带最东侧的错那-沃卡裂谷中段,是由地堑西缘高角度正断层主控的半地堑式断陷盆地。详细的地质、地貌调查表明,该地堑内主要充填有晚新生代以来的多套河湖相、冰碛及冰水沉积地层。河湖相地层底部以黏土和粉砂为主,上部以砾石层为主,向上砾石砾径逐渐变大,顶部为早更新世冲积砾石层;冰碛主要发育于地堑中部山前地带,构成宽缓的冰碛台地或者终碛垄、侧碛堤。地层的测年结果表明,该区主要发育两套晚新生代河湖相地层,早期沉积时代早于5Ma,晚期为晚第四纪;而冰碛及冰水沉积的时代主要为中更新世。综合该区地质地貌、沉积和构造等分析结果表明,早期的河湖相沉积与盆地发生初始裂陷后的主边界正断层发生强烈垂直活动有关,而晚期的河湖相沉积主要形成于盆地后期萎缩过程中,成因可能与中更新世以来的冰川堰塞湖有关。由于邛多江地堑受控于西侧主边界正断层,早期沉积应晚于其初始裂陷时代。因此,进一步综合现有年龄数据资料认为,藏南近南北裂谷的初始裂陷时代应早于5~10Ma,但晚于约15Ma。  相似文献   

Use of principal component analysis for identification of Rockland and Trego Hot Springs tephras in the Hat Creek Graben,northeastern California,USA     

Solène Pouget  Marcus Bursik  Joaquín A. Cortés  Chris Hayward 《Quaternary Research》2014

Discontinuous tephra layers were discovered at Burney Spring Mountain, northern California. Stratigraphic relationships suggest that they are two distinct tephras. Binary plots and standard similarity coefficients of electron probe microanalysis data have been supplemented with principal component analysis to correlate the two tephra layers to known regional tephras. Using principal component analysis, we are furthermore able to bound our uncertainty in the correlation of the two tephra layers. After removal of outliers, within the 95% prediction interval, we can say that one tephra layer is likely the Rockland tephra, aged 565–610 ka, and the second layer is likely from Mt. Mazama, the Trego Hot Springs tephra, aged ~ 29 ka. In the case of the Rockland tephra, the new findings suggest that dispersal to the north was highly restricted. For Trego Hot Springs ash, the new findings extend the distribution to the southwest, with a rapid thinning in that direction. Coupled with considerations of regular tephra dispersal patterns, the results suggest that the primary dispersal direction for both tephras was to the south, and that occurrences in other directions are unlikely or otherwise anomalous.  相似文献   

Plio-Quaternary development of the Baklan–Dinar graben: implications for cross-graben formation in SW Turkey     

《International Geology Review》2012,54(1):33-50

In the Dnepr-Donets trough, salt domes having their origin in Devonian rocks were formed by four stages of cyclic tectonic activity from Late Devonian through Cretaceous. Three types of domes were formed: open piercement core, crypto-diapir, and crypto-diapiroid. - M. Russell.  相似文献   

浅析吉林市圣德泉地热资源成因     

陈永城  张璐  杨益国 《吉林地质》2012,(3):108-110

吉林圣德泉生态园观光旅游区地处伊—舒地堑盆地中部,开发利用第三系砂岩-砂砾岩中的地下热水资源。该地区地热成因属于断裂构造和盆地增温复合型。目前大部分开采的地热田埋藏深度为950～2 000 m,储热层厚度200～300 m,日开采量200～300 m3,水温59～62℃,属于低温地下热水。  相似文献   

Geology of the northern side of the Gulf of Edremit and its tectonic significance for the development of the Aegean grabens     

Yücel Yılmaz  Zekiye Karacık 《Geodinamica Acta》2013,26(1-3):31-43

Abstract

This paper describes the Neogene evolution of north-Western Anatolia based on geological data collected in the course of a new mapping program. The geological history of the region, as recorded by the Neogene sedimentary and magmatic rocks that overlie the Paleozoic-Triassic basement, began after a lake invasion during the Early Miocene period with the deposition of shale-dominated successions. They were accompanied by calc-alkaline intermediate lavas and pyroclastic rocks ejected through NNE trending fractures and faults. The Lower-Middle Miocene successions were deformed under a compressional regime at the end of the Middle Miocene. The deposition of the overlying Upper Miocene-Lower Pliocene successions was restricted to within NE-SW trending graben basins. The graben bounding faults are oblique with a major strike-slip displacement, formed under approximately the N-S extension. The morphological irregularities formed during the Miocene graben formations were obliterated during a severe erosional phase to the end of the deposition of this lacustrine succession. The present E–W graben system as exemplified from the well-developed Edremit graben, postdates the erosional phase, which has formed during the Plio-Quaternary period. © 2001 Éditions Scientifiques et médicates Elsevier SAS  相似文献   

The Çubukludağ graben,south of İzmir: its tectonic significance in the Neogene geological evolution of the western Anatolia     

Can Ş. Genç  Şafak Altunkaynak  Zekiye Karacık  Metin Yazman  Yücel Yılmaz 《Geodinamica Acta》2013,26(1-3):45-55

Abstract

Field studies on the Neogene successions in south of ?zmir reveal that subsequent Neogene continental basins were developed in the region. Initially a vast lake basin was formed during the early-Middle Miocene period. The lacustrine sediments underwent an approximately N-S shortening deformation to the end of Middle Miocene. A small portion of the basin fill was later trapped within the N-S-trending, fault-bounded graben basin, the Çubukluda? graben, opened during the Late Miocene. Oblique-slip normal faults with minor sinistral displacement are formed possibly under N–S extensional regime, and controlled the sediment deposition. Following this the region suffered a phase of denudation which produced a regionwide erosional surface suggesting that the extension interrupted to the end of Late Miocene–Early Pliocene period. After this event the E–W-trending major grabens and horsts of western Anatolia began to form. The graben bounding faults cut across the Upper Miocene–Pliocene lacustrine sediments and fragmented the erosional surface. The Çubukluda? graben began to work as a cross garden between the E–W grabens, since that period. © 2001 Éditions scientifiques et médicales Elsevier SAS  相似文献   

Nature and onset age of neotectonic regime in the northern core of Isparta Angle,SW Turkey     

Ali Koçyiğit  Şule Gürboğa  Doğan Kalafat 《Geodinamica Acta》2013,26(1-2):52-85

The Isparta Angle (IA) is a reverse Λ-shaped morphotectonic structure located to the north of Antalya Gulf in the Eastern Mediterranean Sea. It resulted from the northward curvature of the originally E–W-trending Tauride orogenic belt owing to the nappe emplacements and related clockwise and anti-clockwise rotations in a time period of Early Paleocene to Early Pliocene. The IA is included in the southwest Anatolian tensional neotectonic domain and characterized by a series of grabens and horsts bounded by active normal faults of dissimilar length and trend. The evolutionary history of the graben-horst system is episodic. It is evidenced by two graben fills. These are older and modern (younger) graben fills separated by an intervening angular unconformity. The modern graben fill is nearly flat-lying (non-deformed) whereas older graben fill was deformed into a series of anticlines and synclines with ENE-trending curvi-linear axes by a short-term compressive tectonic regime operated in NNW–SSE direction during Late Pliocene. The diagnostic structures taking a part in the development of grabens and shaping the northern section of the IA are the margin-boundary normal faults. They occur in numerous single and several fault zones displaying a basin ward facing step-like land shape. Most of fault segments, particularly the master faults, are active and have a capacity of creating destructive earthquakes with a magnitude (up to Mw?=?7.0). This is evidenced by both the historical and instrumental period earthquakes. Both the focal mechanism solution of earthquakes and the stereographic plots of slip-plane data, measured on the active margin-boundary faults of various grabens comprising the IA, on the Schmidt lower hemisphere net obviously reveal that the IA is under the influence of the tensional neotectonic regime, not a compressive tectonic regime, i.e. the sinistral strike-slip shearing along the Pliny arc has not propagated yet onshore, and its commencement age is Early Quaternary.  相似文献