共查询到20条相似文献，搜索用时 156 毫秒
1.
利用Q型聚类分析研究鄂尔多斯盆地多种能源矿产间的关系 总被引：1，自引：0，他引：1
为揭示鄂尔多斯盆地多种能源矿产间的关系,根据盆地石油、油气伴生水以及煤、煤层夹矸、铀矿及围岩样品的氯仿沥青中57种元素的分析结果,进行了Q型聚类分析。结果表明:侏罗系下统延安组石油、侏罗系中统直罗组石油与三叠系延长组石油有相近的成因特征;三叠系延长组石油沥青、三叠系延长组含油砂岩沥青与侏罗系中统直罗组石油沥青具有类似的成因特征;神木侏罗系下统延安组煤沥青、东胜侏罗系中统直罗组煤沥青、铜川陈家山侏罗系下统延安组煤层石油以及铜川陈家山侏罗系下统延安组煤沥青成因特征相近;铜川陈家山侏罗系下统延安组煤层石油沥青可能与准格尔黑岱沟石炭二叠系煤沥青具有成因上的联系;侏罗系下统延安组石油沥青与放射性铀矿的形成具有密切关系;天然气的物质来源复杂,且与石油和煤的进一步演化有一定关系。鄂尔多斯盆地多种能源矿产成因较复杂、相互间关系密切,且具有多源性成藏(矿)特征。 相似文献
2.
作者把辽宁本溪田师傅盆地及凤城赛马—阳盆地的早中侏罗世植物群简称田师傅植物群。该植物群由34属77种植物组成。本文是在已确定的名单基础上,着重讨论植物群的性质.组合序列的划分,与同期植物群的比较及其所属地理区和气候带等。田师傅植物群属我国北方锥叶蕨—拟刺葵植物群范围,可划分出早、中、晚3期组合,它与北票、门头沟等植物群最为相似,同属西伯利亚区的中国北方省,反映出温热潮湿的温带或温带—亚热带气候。 相似文献
3.
Anomozamites (Bennettitales) from Middle Jurassic Haifanggou Formation,western Liaoning,China 总被引：1，自引：0，他引：1
The Middle Jurassic Hangfanggou Formation is well exposed in Shangsanjiao and Xiasanjiao villages area,Baimashi town of Huludao,western Liaoning,China.Recently,abundant fossil plants were collected from the Hangfanggou Formation.One new species,Anomozamites sanjiaocunensis sp.nov.(Bennettitales),is described in this study.This is the first report of the genus Anomozamites from the Haifanggou Formation based upon the leaf morphology and epidermal structures.The discovery of the new species extends significantly the stratigraphic and geographic distribution of Anomozamites in the Middle Jurassic.It also shows that Anomozamites was a common member of Bennettitales once lived in the Middle Jurassic warm temperate region.The new species also improves the knowledge on understanding the leaf morphology,epidermal features and the diversity of Anomozamites during the Middle Jurassic.The epidermal characters of the new species and its associated plants reveal that the plants grew in a warm and moderately humid environment in the warm temperate zone.The presence of some deciduous plants,such as ginkgoaleans,czekanowskialeans and conifers,indicate the climate with seasonal fluctuations in temperature. 相似文献
4.
根据砂岩岩石薄片、石英阴极发光和重矿物组合分析,结合沉积构造及地震解释成果,对塔里木盆地库车坳陷东部上三叠统—中侏罗统物源体系及其演化进行详细分析,确定了物源方向及母岩性质。结果表明:塔里木盆地库车坳陷东部上三叠统—中侏罗统物源主要来自北部南天山造山带物源区,以岩浆岩和变质岩母岩为主,兼有少量沉积岩物源的影响。其中,塔里奇克组砂岩中陆源碎屑岩岩屑含量较高,阴极发光条件下不发光石英含量较高,重矿物组合具有高锆石、白钛矿和磁铁矿含量以及低石榴子石含量的特征,母岩可能为上奥陶统—上三叠统早期沉积;阿合组及阳霞组砂岩中岩浆岩岩屑含量升高,重矿物组合以较高的石榴子石含量为特征,阴极发光条件下石英主要为蓝紫色及棕褐色发光,其母岩主要来自二叠系及其下伏地层;克孜勒努尔组及恰克马克组砂岩中变质岩岩屑含量明显升高,石榴子石含量极高,阴极发光条件下棕褐色发光石英含量增多,表明变质岩母岩的影响增强。晚三叠世—中侏罗世,研究区物源区母岩演化具有明显规律性,即晚三叠世受较多沉积岩母岩影响,早侏罗世岩浆岩母岩供给增多,中侏罗世以变质岩母岩为主。晚三叠世,库车坳陷东部南天山造山带大幅抬升,导致大量变质岩母岩卷入造山带遭受剥蚀;早—中侏罗世,南天山造山带中段构造活动具有东西分段的特点,吐格尔明30团剖面以东早侏罗世砂岩率先具有高石榴子石含量的特点,而西部地区中侏罗世砂岩才大量出现石榴子石,表明南天山造山带中段的虎拉山及额尔宾山在早侏罗世隆升-剥蚀强烈,而哈尔克山在中侏罗世才进入强烈抬升期。 相似文献
5.
甘蒙地区北山盆地群发育大量煤系地层,但由于构造演化期次复杂,地震、钻井及相关的古生物资料缺乏,导致煤系地层的时代归属一直存在争议,资源潜力尚未明确。为了明确北山盆地群含煤系地层的时代归属,进一步确定资源潜力,为研究区的能源资源勘探提供基础资料,在系统总结前人研究成果的基础上,以古生物年代学为抓手,以北山盆地群黑鹰山盆地、公婆泉盆地及中口子盆地煤系地层中丰富的孢粉、古生物资料为主要依据,结合煤系地层的岩石组合特征、煤岩工业特性、地震资料等证据对北山盆地群煤系地层时代归属进行了整体研究,重新厘定了北山盆地群煤系地层的时代归属。认为北山盆地群中各个盆地均发育了一套含煤层系,但这套含煤层系的时代归属并不相同,有的属侏罗纪、有的属白垩纪。仅北山盆地群最南部的中口子盆地南部区域以及盆地群最北部的黑鹰山盆地东部的含煤岩系为侏罗系,其他次级盆地的含煤岩系均属于白垩系。盆地群南部中口子盆地含煤岩系的归属问题呈现出和构造相一致的"南北差异",南缘出露煤系地层时代为中侏罗世,北部煤系地层时代为白垩纪。含煤层系归属问题的厘定为进一步确定盆地区的资源潜力提供了依据,可为北山盆地群含煤层系的原型盆地恢复及构造演化等研究提供参考。 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.
辽东本溪田师傅和新开岭地区出露的一套沉积碎屑岩,范国清(1982年)称为东营坊组,时代隶属晚侏罗世。本文依据 Euestheria ziliujinensis 群将东营坊组时代置于中侏罗早中期,与辽西海房沟组、冀北九龙山组叶肢介动物群主体基本一致。依据 Pagiophyllum cf.maculosum,P.cf.shahoziensis,Brachyphyllumcf.mamillare,Coniopteris sp.等植物化石和区域地层接触关系,东营坊组应置于转山子组、大堡组和三个岭组之上。 相似文献
8.
辽西南天门断裂及其与北票组发育的关系 总被引：1，自引：0，他引：1
通过对辽西地区ＴＭ图像地质解译和对南天门断裂的研究表明，虽然南天门断裂现今在地形地貌上表现为其西的北票、朝阳、建昌盆地和其东的金羊盆地的区域性分隔断裂，但是实际上在早侏罗世末以前，则是一个统一盆地内的潜伏（基底）断裂，即非现今的盆地边缘断裂。由于盆地内普遍发育含有油气性良好的下侏罗统北票组，因此，辽西地区应具有良好的油气勘探开发前景。 相似文献
9.
本文记述了产于四川龙门山地区中、上泥盆统界线附近观雾山组和土桥子组的四射珊瑚。在大量珊瑚标本鉴定的基础上,建立了中泥盆世晚期至晚泥盆世初期的四个四射珊瑚化石组合。根据四射珊瑚的演化规律,确定以Peneckiella珊瑚类的兴起和Pseudozaphrentis hejiazhaiensis,Temnophyllun(Truncicarinulum)beichua-nensis珊瑚类的消失作为龙门山地区识别中、上泥盆统界线的标志。 相似文献
10.
More than 35 species belonging to 22 genera of fossil plants are recognized by the authors from the Shansonggang flora in the 8hansonggang Basin of Jilin, China. Among them, the coexistence of Coniopteris and Cycadocarpidium demonstrates that the present flora possesses the characters of the early assemblage of Early Jurassic floras in Eurasia. Therefore, the age of the Shansonggang flora is considered the Early Jurassic.This study would be beneficial for better understanding the paleoecological and paleoclimatic characteristics of the Shansonggang Basin. Based mainly on the characters of the flora, the authors suggest that the Lower Jurassic coal-bearing strata, the Shansongang Formation, should namely be renewed. 相似文献
11.
1IntroductionThe Shansonggang Basin, one of the Mesozoic coal-bearing basins in northeastern China, is located in southern Jilin Province, China and covering about 30 km2(Fig.1). The basin is lying in the northwest-ern margin of the Longgang anticline, just opposite to the Yihe Basin which lies in the southeastern margin of the anticline. During 1940s~1970 s, a lot of work on the survey of coal geology was made in the basin, but there has been a little knowledge about the plant fossils… 相似文献
12.
13.
依据化石的层位分布和组成内容，登封二叠纪煤系地层植物群由下而上可划分为三个植物化石组合带：１．早二叠世中期山西组Ｅｍｐｌｅｃｔｏｐｔｅｒｉｓｔｒｉａｎｇｕｌａｒｉｓ－Ｔａｅｎｉｏｐｔｅｒｉｓｍｕｌｔｉｎｅｒｖｉｓａｓ－ｓｅｍｂｌａｇｅｚｏｎｅ；２．早二叠世晚期下石盒子组Ｇｉｇａｎｔｏｐｔｅｒｉｓｎｉｃｏｔｉａｎａｅｆｏｌｉａ－Ｃｈｉｒｏｐｔｅｒｉｓｒｅｎｉｆｏｒｍｉｓａｓｓｅｍｂｌａｇｅｚｏｎｅ；３．晚二叠世早期上石盒子组Ｌｏｂａｔａｎｎｕｌａｒｉａｈｅｉａｎｅｎｓｉｓ－Ｐｔｅｒｏｐｈｙｌｌｕｍｅｒａｔｕｍａｓ－ｓｅｍｂｌａｇｅｚｏｎｅ。另外，文中还讨论了这些植物组合的主要特点 相似文献
14.
早侏罗世经历了赫塘期、辛涅缪尔期、普林斯巴期和土阿辛期, 其中土阿辛期大洋缺氧事件(T-OAE)被广泛研究。但在辛涅缪尔阶-普林斯巴阶界线处, δ 13Corg及δ 13Ccarb曲线均发生负偏, 局部伴随黑色页岩沉积。其在英国、法国、意大利、葡萄牙以及中国等地区都有记录, 碳同位素的变化伴随着环境、气候的变化, 研究显示该事件可能是全球性的, 被称为“S-P界线事件”(SPBE)。此次地质事件与T-OAE事件类似, 也显示了一次大洋缺氧事件, 其发生时有轻碳同位素被排入了大气系统中, 但是轻碳同位素的来源尚不明确, 部分学者认为是大火成岩省喷发时排放的轻碳物质注入了海洋-大气系统所致。目前对该事件的研究主要集中于欧洲海相地层, 其对陆地生态系统的影响还知之甚少。我国四川盆地下侏罗统湖相沉积发育良好, 下侏罗统自流井组东岳庙段沉积有与大安寨段(T-OAE发生层段)类似的黑色页岩及介壳灰岩, 其有机碳同位素负偏, 显示了S-P界线事件的影响, 其与T-OAE类似也对四川盆地早侏罗世古湖泊产生了影响。 相似文献
15.
《世界地质(英文版)》2015,(3)
Subgenus Phoenicopsis( Phoenicopsis) assigned to Czekanowskiales is recognized and a new species,Phoenicopsis( Ph.) ordosensis sp. nov. is first reported from the Middle Jurassic Yan'an Formation of the Ordos Basin,alternate based upon the leaf gross morphology and epidermal structures. The new species has linear leavs in bundles of five to six attached on a short shoot,more than 100 mm long by 5-6 mm wide,containing 10-12 parallel veins at upper portion. The leaf is hypostomatic. Epidermal cells are longitudinally arranged with smooth periclinal wall on the upper cuticle. The narrow non-stomatal zones and wide stomatal zones alternate in the lower cuticle. Stomata in four to five irregular spaced rows are longitudinally oriented in each stomatal zone.Guard cells for each are surrounded by four to five subsidiary cells with undeveloped papillae. Anticlinal walls of ordinary epidermal cells are nearly straight and periclinal walls slightly papillate. The new species shallow stomatal pits kept open and surrounded by unevenly undeveloped bulges. These characters are consistent with those of growth in a humid,rather than an arid climate. The presence of subgenus Phoenicopsis and other taxa of Czekanowskiales in the coal-bearing Yan'an Formation supports the view that the climate in the Ordos Basin was humid and warm with seasonal changes during the Middle Jurassic. 相似文献
16.
樊家川油田河流相储层高分辨率层序地层特征 总被引：2，自引：2，他引：0
针对河流相储层标志层缺乏、砂体叠置掘蚀严重、难以精细等时对比的难点，应用基准面旋回原理，重点解剖典型取心井及其测井响应模式，将樊家川油田主要含油层系中侏罗世延安组Y8～Y10油组划分为7个短期、3个中期、2个长期基准面旋回层序，对应于不同级次的储层成因单元，同时建立以中期旋回为年代地层格架。短期旋回为等时地层对比单元的层序地层格架，对河流相多期叠覆储层进行了精细等时划分与对比，详细分析了河流相储层短期基准面旋回类型及其叠加式样。探讨了各级基准面旋回对储层分布的控制作用。 相似文献
17.
A new dinosaur tracksite was discovered in a steeply inclined sandstone layer of the Middle Jurassic Sanjianfang Formation in the Shanshan area of the Turpan Basin. The site is the first record of dinosaur footprints from Xinjiang Province in northwestern China. More than 150 tridactyl theropod dinosaur footprints are preserved as positive hyporeliefs on the lower bedding plane of a fine-grained sandstone body. Most of the footprints are isolated and appear to be randomly distributed. Some show well defined phalangeal pads, heels and rarely indistinct impressions of the distal part of the metatarsus. Two distinct morphotypes are present: a larger type with relatively broad pads shows similarities to Changpeipus and Megalosauripus, and a slightly smaller, slender and gracile type which is similar to Grallator, Eubrontes and Anchisauripus. In both morphotypes, digit III is the longest with a length between 11.4 and 33.6 cm. A single imprint shows prominent scratches, probably formed during slipping of the track maker. 相似文献
18.
The first dinosaur tracksite from Xinjiang, NW China （Middle Jurassic Sanjianfang Formation, Turpan Basin） a preliminary report 总被引：1，自引：0，他引：1
A new dinosaur tracksite was discovered in a steeply inclined sandstone layer of the Middle Jurassic Sanjianfang Formation in the Shanshan area of the Turpan Basin. The site is the first record of dinosaur footprints from Xinjiang Province in northwestern China. More than 150 tridactyl theropod dinosaur footprints are preserved as positive hyporeliefs on the lower bedding plane of a fine-grained sandstone body. Most of the footprints are isolated and appear to be randomly distributed. Some show well defined phalangeal pads, heels and rarely indistinct impressions of the distal part of the metatarsus. Two distinct morphotypes are present: a larger type with relatively broad pads shows similarities to Changpeipus and Megalosauripus, and a slightly smaller, slender and gracile type which is similar to Grallator, Eubrontes and Anchisauripus. In both morphotypes, digit III is the longest with a length between 11.4 and 33.6 cm. A single imprint shows prominent scratches, probably formed during slipping of the track maker. 相似文献
19.
20.
煤矿安全生产信息系统的设计与实施 总被引：1，自引：0，他引：1
煤矿生产安全管理是一项复杂的系统工程,安全生产管理中的生产条件合理评估,应急情况下人员的避灾及救援是煤矿安全生产的研究热点。本文在分析国内煤矿安全生产现状的基础上,对煤矿安全生产信息系统进行了总体设计,探讨了系统的总体结构、数据组织,详细设计了井下运输、矿井通风、井下给排水、井下供电、安全应急等煤矿安全生产的业务应用功能,从技术实现的角度阐述了系统的开发环境、数据建库和系统集成等关键技术,以某煤矿为例,在Supermap平台上实现了避灾路径分析、运输网络、通风网络、供电网络、给排水网络分析等分析功能,为煤矿管理与安全生产提供了科学的决策支持。 相似文献