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1.
盆地面积130平方公里,为中上元古界及寒武系所环绕。石炭二叠含煤岩系则主要隐伏在盆内中新生界之下,面积约10平方公里。煤系基底为寒武系,石炭系和二叠系下统山西组下段为含煤岩系。山西组含煤三层,其中B_2煤全区可采;煤系盖层缺失山西组上段至朱罗系一套地层。构造以断裂为主,褶皱次之。二叠纪后本区隆起,煤系中上部遭到风化剥蚀,燕山运动早期(朱罗纪时),使全区隆起形成一些小褶皱,小面积的煤系在向斜核部才得以保存。白垩纪时本区又趋于下降,沉积了九店组,喜山期除断裂活动外,沉积了第三系,上陶庄—西岭—任庄向斜是本区初序次的基本护煤构造;盆缘断裂限制煤系赋存的范围;盆内断裂影响煤系赋存深度;大占砂岩具较强的抗风化能力,亦起较大的护煤作用。鉴于上述:寒武系上统箇山组为煤系底板的最高层位,是找矿标志之一,向斜褶皱是煤系存在的基础。此类掩盖式煤田在河南尚属少见,盆地西北已封闭,东南尚有一定远景。 相似文献
2.
通过对北山－巴丹吉林地区石炭纪－二叠纪的沉积、古生物、岩浆岩、混杂岩、火山岩等的调查研究,认为 北山－巴丹吉林地区的构造古地理为由哈萨克斯坦板块、塔里木板块和华北板块３个板块和牛圈子洋(对应红柳 河－牛圈子－洗肠井蛇绿混杂岩带)、恩格尔乌苏洋(对应恩格尔乌苏蛇绿混杂岩带)２个大洋并存的格局.哈萨 克斯坦板块主要包括黑鹰山－马鬃山区;塔里木板块包括石板泉－杭乌拉区;华北板块主要包括乌力吉区.黑鹰 山－马鬃山区的构造古地理为黑鹰山弧后盆地和马鬃山岛弧;石板泉－杭乌拉区的构造古地理为被动大?边缘; 乌力吉区的构造古地理为乌力吉北岛弧和乌力吉弧后盆地.通过分析各构造古地理单元的特征和演化过程,认 为塔里木板块和哈萨克斯坦板块拼合时间为晚石炭世,塔里木板块与华北板块的拼合时间大致为晚二叠世. 相似文献
3.
通过对同处东海陆架盆地西部凹陷群的长江凹陷、瓯江凹陷以及处于陆架盆地东部凹陷群但与长江凹陷相连通的西湖
凹陷3凹陷在构造背景、形成演化、构造特征、地层分布与沉积环境变迁等方面的综合对比分析认为,长江凹陷古新统美人峰组中
上部、始新统长江组中上部应分别具有与瓯江凹陷古新统中上部的明月峰组、西湖凹陷始新统中上部的平湖组相似的含煤层系分
布,渐新统以上地层不存在或仅有部分煤线分布;与西湖凹陷相连通的南部大观园深凹内部广泛发育的连接浙闽隆起和翠秀堂低
凸的构造斜坡带是含煤层系分布的最有利区域。 相似文献
凹陷3凹陷在构造背景、形成演化、构造特征、地层分布与沉积环境变迁等方面的综合对比分析认为,长江凹陷古新统美人峰组中
上部、始新统长江组中上部应分别具有与瓯江凹陷古新统中上部的明月峰组、西湖凹陷始新统中上部的平湖组相似的含煤层系分
布,渐新统以上地层不存在或仅有部分煤线分布;与西湖凹陷相连通的南部大观园深凹内部广泛发育的连接浙闽隆起和翠秀堂低
凸的构造斜坡带是含煤层系分布的最有利区域。 相似文献
4.
辽西地区逆冲断层和推覆体构造 总被引：2，自引：0，他引：2
辽宁西部侏罗纪盆地西缘,如金岭寺-羊山、北票、木头城子、汤神庙、牛营子-郭家店等盆地西缘发育着逆冲断层和推覆体构造群,呈北东向带状展布,断面北西倾斜,外来系统为中上元古界和古生界,原地系统为侏罗纪煤系。主要成生于燕山早期,喜山早期仍有活动,印支期可能已出现。属华夏类型构造成分。中生代以来亚洲大陆相对太平洋南移,产生的侧向挤压作用形成上述构造。侏罗纪盆地含煤建造被外来系统地层掩盖,外来系统地层在滑动过程中上古生界煤系也经常被埋藏,因此,研究逆冲断层和推覆体构造对寻找上古生界、侏罗系煤层有重要意义。 相似文献
5.
根据井田地层、构造和侵入岩等资料,分析了大杨树煤田振兴煤矿一号井含煤地层构造特点,以及可采煤层1下和2下煤层的煤质特征。得出了振兴煤矿一号井含煤地层为白垩系下统大磨拐河组含煤岩系,总体为一单斜构造;该区煤种为低硫、低磷、中低灰分长焰煤,可作为动力用煤和民用煤。 相似文献
6.
西湾煤系是广西重要含煤层位之一,以碳酸盐岩夹煤层为特征,自下而上分天堂组和大岭组,主要煤层赋存于大岭组中。煤系时代有晚三叠世与早侏罗世之争。1988年笔者之一冯少南,曾报道了天堂组产植物化石Danaeopsis fecunda Halle,为煤系时代归属提供了重要古生物依据。今年笔者在大岭组的灰岩中分析出牙形刺,认为大岭组的时代应属晚三叠世,并进一步说明大岭组为潮坪泻湖→滨海沼泽相沉积。 相似文献
7.
本文系统地总结了百色盆地的第三纪地层,运用多重地层学的理论和方法进行了新的研究和对比,初步提出了划分依据。对古生物七个门类27个组合(带)进行了对比和厘定,重新研究洞均组古脊椎动物化石确定时代为中始新世晚期;在原定更新世长蛇岭组中新发现植物和孢粉,确定地层时代为上新世;研究物性地层解决六吜组与那读组的对比;研究地震地层序列4个,对深部地层划分和构造特征和演化取得了一些新的资料。分析年代地层,提出盆地主干断裂—南伍断裂的初始活动时间为29Ma。为油田开发和油层对比提供了可靠的基础资料。 相似文献
8.
北山盆地群侏罗系是我国西北地区潜在的油气勘探新领域,为深化其石油地质认识,进一步明确资源潜 力,优选北山盆地群中勘探程度相对较高的中口子盆地侏罗系为研究对象,以有机质丰度、类型及成熟度等有机 地球化学分析数据为基础,分析了侏罗系烃源岩基础特征,并基于生物标志化合物资料,探讨了该区侏罗系烃源 岩的有机质来源及沉积环境.结果表明,中口子盆地侏罗系烃源岩有机质丰度较高,生烃潜力较好,主要为中等 －好烃源岩,干酪根类型以Ⅱ２ 型为主,生烃母质主要是?源高等植物,主要形成于氧气量适中的弱氧化－弱还原 古环境,靠近或λ于凹陷中心的烃源岩形成环境还原性稍强,较有利于有机质保存.区内黑帐房凹陷烃源岩已经 成熟,而南泉凹陷烃源岩主要为低熟.因此建议黑帐房凹陷中心或者临近中心区域,寻找保存条件好的油藏是取 得下步油气勘探突破的重点.这些认识可供西北地区侏罗系沉积古环境和资源潜力研究时对比参考. 相似文献
9.
中生代义马盆地不仅以中原唯一的中生代产煤盆地而著名，而且早中侏罗世的义马组含煤地层和晚三叠世地层中，保存了大量完美的各类动植物化石。长期以来，随着煤田勘查和开发，许多著名的地质、古生物学家进行了大量地质调查及地质古生物科学研究工作，取得了多项有世界性影响的科研成果。其中银杏化石植物群的发现，在世界上引起轰动，这是全世界迄今发现最古老的银杏化石群，被国际地质、古生物学术界命名为“义马银杏”， 相似文献
10.
平邑盆地老第三纪沉积了一套以内陆湖相为主的岩石组合 ,称官庄群。其早期形成的固城组以砾岩为主 ,夹含砾砂岩及砂质泥岩。《山东省岩石地层》定义的固城组层序因断层影响而与平邑盆地实际情况不符 ,其所划的下部红色粘土岩实为卞桥组一段 ,而红色粘土岩之下真正的固城组则被错划为白垩纪青山群。本文将固城组重新厘定为 :不整合于早白垩世火山岩地层之上 ,整合于古新世卞桥组之下的一套以砾岩为主 ,夹含砾砂岩和砂质泥岩的岩石组合 ,并引述了有关的地层剖面。 相似文献
11.
WANG Dehai KANG Haiping ZHAO Yanwei ZHAO Dalin LV Shicong WU Jianan CHEN Chunguang 《世界地质(英文版)》2013,16(1):35-42
A number of isolated fault sags in Late Jurassic--Early Cretaceous were developed in the early stage of southern Songliao Basin,and unified to a depression basin in the late stage.Therefore,multiple isolated lower petroliferous systems were formed with fault sags as source rocks.The source rocks of fault sags in Late Jurassic--Early Cretaceous were mainly described with gas generation as favorable source rocks,leading to the southern Songliao Basin rich in natural gas resources combined with organic gas resources in Nenjiang Formation.A number of tectonic movements in southern Songliao Basin led to the formation of abundant structural traps and complex fault systems,and controlled the distribution strata and positions of sources rocks in Late Jurassic--Early Cretaceous fault sags.The oil-gas reservoirs can be divided into two types,i.e.,primary and secondary ones.The primary oil-gas reservoirs were distributed in the fault sag strata and the bottom of overlying depression strata(lower Quan-1 Member).The oil-gas reservoir accumulation depended on the trap development situation and the distance from source rocks.The preservation conditions of oil-gas reservoirs depended on the degree of reconstruction in the late tectonism.The secondary oil-gas reservoirs were distribution in the Quantou Formation of depression strata,where oil and gas reservoir accumulation depended on three conditions,i.e.,trap development situation,deep gas sources and the fault to connect the shallow traps and deep gas sources.The southern Songliao Basin is rich in lower coal type gas,upper oil-gas and biogas resources,which are important resources in the future. 相似文献
12.
In the Korean Peninsula the Meso-Cenozoic basins were mainly formed due to fault block and block movement. The Mesozoic fracture structures correspond basically to modern large rivers in direction. Such faults were usually developed to rift and formed lake-type tectonic basin, such as the Amrokgang-, Taedonggang-, Ryesonggang-, Hochongang-, Jangphari-, Susongchon-, Pujon-, and Nampho basins. The Mesozoic strata are considered to be divided into the Lower Jurassic Taedong System, Upper Jurassic Jasong System, Upper Jurassic－early Lower Cretaceous Taebo System, and the Upper Cretaceous－Paleocene (Chonjaebong, Hongwon, Jaedok Series) . The Cenozoic block movement succeeded the Mesozoic fault block movement. The Kilju-Myonchon Graben and Tumangang Basin, etc, are the basins related to the fault zones developed from the Oligocene to Miocene. In addition, the Tertiary basins were formed in many areas in the Miocene ( e. g. Sinhung, Oro, Hamhung, Yonghung, Anbyon, Cholwon, etc) . The Cenozoic sedimentation occurred mainly from the late Oligocene to Miocene. The Kilju-Myongchon Graben was the fore deep connected to the sea and the basins inclined in the Chugaryong Fault Zone are intramountain basins. Therefore, coal-bearing beds and clastic rocks in the intramountain basins and rare marine strata and terrigenous clastic rocks are main sedimentary sequences in the Cenozoic. 相似文献
13.
赵虹 《地球科学与环境学报》1998,(Z1)
北山盆地群侏罗系和下白垩统砂岩储层主要属长石岩屑砂岩和岩屑长石砂岩,其次为岩屑砂岩,成分和结构成熟度均较低;储层孔隙类型以次生孔隙为主,孔隙结构及物性总体较差。储层分类评价及综合分析表明,中侏罗统储层属较有利储层,在北山盆地群具有较重要的储集意义。 相似文献
14.
Sedimentary basins in the Yellow Sea can be grouped tectonically into the North Yellow Sea Basin (NYSB), the northern basin of the South Yellow Sea (SYSNB) and the southern basin of the South Yellow Sea (SYSSB). The NYSB is connected to Anju Basin to the east. The SYSSB extends to Subei Basin to the west. The acoustic basement of basins in the North Yellow Sea and South Yellow Sea is disparate, having different stratigraphic evolution and oil accumulation features, even though they have been under the same stress regime since the Late Triassic. The acoustic basement of the NYSB features China-Korea Platform crystalline rocks, whereas those in the SYSNB and SYSSB are of the Paleozoic Yangtze Platform sedimentary layers or metamorphic rocks. Since the Late Mesozoic terrestrial strata in the eastern of the NYSB (West Korea Bay Basin) were discovered having industrial hydrocarbon accumulation, the oil potential in the Mesozoic strata in the west depression of the basin could be promising, although the petroleum exploration in the South Yellow Sea has made no break-through yet. New deep reflection data and several drilling wells have indicated the source rock of the Mesozoic in the basins of South Yellow Sea, and the Paleozoic platform marine facies in the SYSSB and Central Rise could be the other hosts of oil or natural gas. The Mesozoic hydrocarbon could be found in the Mesozoic of the foredeep basin in the SYSNB that bears potential hydrocarbon in thick Cretaceous strata, and so does the SYSSB where the same petroleum system exists to that of oil-bearing Subei Basin. 相似文献
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16.
There are eighty sedimentary basins in five different types in African continent, i. e. craton sag basin, foreland basin, intermountain basin, passive margin basin and rift basin, which underwent the stress environment of stable depression-compression-extension. The first three types of basins had been intensely influenced by Hercynian and Alpine tectonic movement, while the later two types of basins always exist in a stable extension environment. Different basin evolution caused the obviously hydrocarbon distribution difference. In North Africa, marginal craton sag and rift basins show great expedition potential of hydrocarbon, marginal craton sag basins had good formation and preservation of Lower Silurian hot shale, tectonic-strata traps and migration pathway formed by Hercynian unconformity, and rift basins had excellent Upper Cretaceous marine source rocks and good hydrocarbon preservation with little tectonic activity. Meanwhile, in the salt-containing passive margin basins and delta basins of West Africa, thick strata containing high quality source rocks and plastic strata were well developed. Source rocks of high maturity, good hydrocarbon preservation, growth faults and deformational structure traps were formed by abundant overlying sediments and sources supplied from Tertiary large water system. 相似文献
17.
蒙阴盆地是在库拉板块向亚洲大陆下俯冲，中国东部隆升伸展板块裂解阶段发育起来的。在中生代，盆地的成生演化经历了侏罗纪拗陷盆地发育阶段和早白垩世拗陷—裂陷阶段。在相应沉积演化过程中，形成侏罗纪湖相红色碎屑岩建造，早白垩世早期滨浅湖—半深湖相灰绿色细粒陆屑岩沉积，早白垩世中期河湖相凝灰质复陆屑岩类夹火山碎屑岩类沉积，早白垩世晚期中基性火山熔岩、火山碎屑岩组合。沉积中心在侏罗纪和早白墨世早期皆偏于西北部，此后，向东南部迁移。晚白垩世，盆地处于风化剥蚀阶段。古近纪，受新生太平洋板块向亚洲大陆下俯冲影响，盆地又处于拗陷—裂陷阶段，相应形成山间河湖相—山麓堆积相类磨拉石建造。古近纪末期，该盆地整体隆起处于长期风化剥蚀状态。 相似文献
18.
The Cretaceous of Afghanistan is marked by great facies diversity. The evolution of Cretaceous basins is part of a complex accretionary history involving three distinct tectonic units namely the Asian (Russian) Block separated from the Indian plate by a rather well defined transcurrent fault (Chaman-Nuski). The southwestern component is representedby the Iran-Afghanistan plate. The Lower Cretaceous of the Asian Block is represented by the Red-Grit Series which isconformable to the underlying Upper Jurassic sequences. The transition is marked by evaporitic facies dominated by salt,gypsum and marl deposits. In south Afghanistan volcanic rocks occur at Farah, with the emplacement of plutonics inwest-central Afghanistan. The Upper Cretaceous of north Afghanistan is marked by richly fossiliferous, lime stone-dominated sequences. The Upper Cretaceous of southern Afghanistan is marked by strong ophiolitic magrmatism. 相似文献
19.
In the Korean Peninsula the Meso-Cenozoic basins were mainly formed due to fault block and block movement. The Mesozoic fracture structures correspond basically to modem large rivers in direction. Such faults were usually developed to rift and formed lake-type tectonic basin, such as the Amrokgang-, Taedonggang-, Ryesonggang-, Hochongang-, Jangphari-, Susongchon-, Pujon-, and Nampho basins. The Mesozoic strata are considered to be divided into the Lower Jurassic Taedong System, Upper Jurassic Jasong System, Upper Jurassic-early Lower Cretaceous Taebo System, and the Upper Cretaceous-Paleocene （ Chonjaebong, Hongwon, Jaedok Series）. The Cenozoic block movement succeeded the Mesozoic fault block movement. The Kilju-Myongchon Graben and Tumangang Basin, etc, are the basins related to the fault zones developed from the Oligocene to Miocene. In addition, the Tertiary basins were formed in many areas in the Miocene （e. g. Sinhung, Oro, Hamhung, Yonghung, Anbyon, Cholwon, etc）. The Cenozoic sedimentation occurred mainly from the late Oligocene to Miocene. The Kilju-Myongchon Graben was the fore deep connected to the sea and the basins inclined in the Chugaryong Fault Zone are intramountain basins. Therefore, coal-beating beds and clastic rocks in the intramountain basins and rare marine strata and terrigenous clastic rocks are main sedimentary sequences in the Cenozoic. 相似文献
20.
聚龙山向斜三叠系含水层经历了多期次岩溶综合作用, 其岩溶发育演化规律对于深入认识该地区水文地质条件及分析地下水流场具有重要意义。运用历史比较法, 结合研究区三叠系含水层水化学、同位素、钻孔等资料, 对聚龙山向斜构造演化与岩溶发育史进行了探讨, 进而恢复了地下水流场的演化过程。结果表明, 震旦纪-中三叠世, 研究区构造运动总体表现为垂向上的升降, 沉积的海相地层为岩溶发育提供了物质基础, 但不具备岩溶发育条件, 主要在二叠系茅口组和三叠系嘉陵江组顶面形成古岩溶作用。晚三叠世-早侏罗世, 聚龙山向斜以缓慢隆升为主, 在荆当凹陷的湖盆中相继沉积陆源碎屑, 由于广泛覆盖在碳酸盐岩之上的三叠系巴东组碎屑岩刚接受剥蚀, 导致该时期主要表现为位于水下的埋藏型岩溶。中侏罗世-早白垩世, 燕山运动产生的挤压应力促使研究区形成EW-NW向褶皱、断裂及裂隙, 控制了碳酸盐岩的平面分布格局。部分碳酸盐岩裸露, 岩溶开始发育, 这时期地表水和地下水向荆当凹陷汇集。晚白垩世-古近纪, 随着江汉断陷盆地形成, 盖层巴东组碎屑岩剥蚀线逐渐向南退却, 岩溶发育进一步加强, 产生的老岩溶水系和部分地下水向最低基准面江陵断陷排泄。新近纪以来, 构造运动的间歇性快速抬升使岩溶不断向深部发育, 形成五级岩溶台面和多级地下水流系统, 地表水和地下水最终排泄至长江。地下水流场具有山区到凹陷-断陷盆地-长江的多级次演化机制。 相似文献