共查询到18条相似文献，搜索用时 93 毫秒
1.
Wang Wenli Institute of Natural History Beijing Natural History Museum Yang Zunyi 《《地质学报》英文版》1993,67(3)
A new insect family Liaoximordellidae (fam. nov.) has been named for a well-preserved specimen which was collected from the Upper Jurassic outcropping west of Daxinfangzi Village, Lingyuan County, Liaoning Province. The specimen can not be put into Mordellidae or Praemordellidae because it possesses some original and intermediate characters in morphology. It serves the study of mordellid evolution. Besides, the fossil group associated with the insect is important for the stratigraphic division of the Mesozoic in western Liaoning. 相似文献
2.
Junchang JI Qiang Institute of Geology Chinese Academy of Geological Sciences Beijing 《《地质学报》英文版》2005,79(2):157-163
Based on a nearly complete skeleton with skull from the Early Cretaceous of Liaoning Province, a new ornithocheirid pterosaur: Boreopterus cuiae gen. et sp. nov. is erected. Boreopterus cuiae is different from other pterosaurs preserved with skulls known from the western Liaoning Province and its neighboring areas. Tiffs new oterosaur has more and larger teeth than those in other ornithocheirids. Its anterior nine pairs of teeth are larger than other teeth. The fourth pair of upper and lower teeth are slightly larger than the third pair. Overall, Boreopterus cuiae shows much small range of tooth size variation than Anhanguerapiscator and Coloborhynchus robustus. The new taxon shares with other ornithocherids in having a relatively large size of the third and fourth pairs of teeth. 相似文献
3.
Two incomplete bones referred to ankylosaur scapulocoracoid and humerus are described, which were discovered from the Early Cretaceous Jiufotang Formation of Dachengzi Town, Kazuo County, Liaoning Province. Ankylosaur dinosaurs have ever been found in the Lower Cretaceous Yixian, Fuxin and Sunjiawan Formations of western Liaoning. The occurrence of ankylosaurs within Jiufotang Formation improves our knowledge on the ankylosaur stratigraphic distribution. Based on the length of scapulocoracoid, the new dinosaur is estimated to exceed 6.0 meters long, representing the largest ankylosaur in western Liaoning. 相似文献
4.
A New Specimen of Liaoceratops yanzigouensis (Dinosauria: Neoceratopsia) from the Early Cretaceous of Liaoning Province, China 
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下载免费PDF全文 A new specimen of basal neoceratopsian dinosaur Liaoceratops yanzigouensis is described. The specimen comes from the Lujiatun Bed of the Lower Cretaceous Yixian Formation in Beipiao City of western Liaoning Province, and is represented by a very well preserved three-dimensional partial skull and mandible. It is also the smallest among the three specimens of L. yanzigouensis, and several features in the new specimen, such as the short preorbital length and the round rostroventral orbital rim, can be ontogenetically-related. The superb exposure of the palatal complex may be caused by the removing of its brain by a small predator in the contemporary Jehol Biota. 相似文献
5.
New Fossil Xyelidae (Insecta, Hymenoptera) from the Yixian Formation of Western Liaoning, China 总被引：1，自引：0，他引：1
In this paper one new genus and two new species, Brachyoxyela brevinodia sp. nov. and Brachyoxyela gracilenta sp. nov., in the subfamily Macroxyelinae of the family Xyelidae, are described and illustrated. The specimens were collected from the Yixian Formation, the Upper Jurassic to Lower Cretaceous, of Beipiao City, Liaoning Province, northeastern China. The new genus is established based on the characters that vein Sc meets R only beyond origin of Rs, third antennal segment is almost equal in length to the rest flagellomeres combined, terminal flagellomeres increasingly shortened toward apex, and vein 2r-rs inclined toward the apex of wing. 相似文献
6.
A New Genus of Fossil Cycads Yixianophyllum gen. nov. from the Late Jurassic Yixian Formation, Western Liaoning, China 总被引：2，自引：2，他引：0
ZHENG Shaolin LI Nan LI Yong ZHANG Wu BIAN Xiongfei Shenyang Institute of Geology Mineral Resources Ministry of Land Resources Shenyang Liaoning Botanical Gardens of Xianhu Shenzhen Guangdong 《《地质学报》英文版》2005,79(5):582-592
A new genus of fossil Cycads, Yixianophyllum gen. nov., is reported here. The specimens were collected from the southern hill of Jinjiagou village, Toudaohezi Town, Yixian County, western Liaoning Province, China. The fossil plant-beating bed belongs to the lower part, the Zhuanchengzi bed, of the Upper Jurassic Yixian Formation （Yixianian）. The new genus in leaf shape, venation and epidermal structure shows a transitional form between Mesozoic Cycads （Ctenis, Nilssonia） and modem Cycads （Stangeria and Encephalartos）. Since the features of these specimens differ from any known genera of Cycads, a new generic name Yixianophyllum is proposed for these leaves. Typical species, Yixianophyllum jinjiagouense gen. et sp. nov. is described here. A supposed evolutionary tendency of Cycadean leaf-forms with Taeniopteris-type is discussed. 相似文献
7.
LI Jianjun LI Zhiheng ZHANG Yuguang ZHOU Zhonghe BAI Zhiqiang ZHANG Lifu BA Tuya 《《地质学报》英文版》2008,82(6):1115-1123
An incomplete postcranial avian skeleton is described from the Lower Cretaceous Jingchuan Formation of Otog Banner of western Inner Mongolia and referred to a new species of Cathayornis, C. chabuensis sp. nov. This is the first report of a Cathayornis from outside Liaoning Province. The new discovery indicates that Cathayornis coexisted with Otogornis genghisi, and a more detailed comparison between these two enantiornithine genera shows that Otogornis represents a more primitive genus than Cathayornis. Our analyses further indicate that Cathayornis is an arboreal bird. The discovery of a Cathayornis from this region also confirms that the avian fossil-bearing Jingchuan Formation is comparable to the Jiufotang Formation of the upper Jehol Group in western Liaoning, and should be referred to the middle-late Early Cretaceous. 相似文献
8.
A New Troodontid Dinosaur from the Lower Cretaceous Yixian Formation of Liaoning Province, China 总被引：1，自引：1，他引：0
SHEN Caizhi Lü Junchang LIU Sizhao Martin KUNDRáT Stephen L. BRUSATTE GAO Hailong 《《地质学报》英文版》2017,91(3):763-780
A new troodontid dinosaur,Daliansaurus liaoningensis gen.et sp.nov.,is erected based on a nearly complete specimen from the Lower Cretaceous Yixian Formation of Beipiao City,Liaoning Province,China.This well preserved skeleton provides important new details of the anatomy for Liaoning troodontids,and gives new insight into their phylogenetic relationships and evolution.Daliansaurus is distinguished from other troodontids by an enlarged ungual on pedal digit IV,which is approximately the same size as the sickle-shaped second ungual,and is differentiated from other Liaoning troodontids by a number of characters of the skull,manus,pelvis,and hindlimb.A phylogenetic analysis recovers Daliansaurus within a subclade of Liaoning troodontids that also includes Sinovenator,Sinusonasus,and Mei.We erect a name for this group—Sinovenatorinae—and argue that it reflects a localized radiation of small-bodied troodontids in the Early Cretaceous of eastern Asia,similar to previously recognized radiations of Liaoning dromaeosaurids and avialans.As more Liaoning theropods are discovered,it is becoming apparent that small,feathered paravians were particularly diverse during the Early Cretaceous,and future work is needed to clarify how this diversity arose,which species coexisted,and how these numerous species partitioned niches. 相似文献
9.
LU Yuanf CHENG Yuchuan LI Huaqing XUE Chunji CHENG Fuwen Yichang Institute of Geology Mineral Resources Yichang Hubei Chinese Academy of Geological Sciences Beijing Chang’an University Xi’an Shaanxi 《《地质学报》英文版》2005,79(3):414-425
1 Introduction Metallogenic chronology is one of the keys in the research of mineral deposits. Determination of metallogenetic epoch is very important for understanding the relationships between mineralization and regional tectonomagmatic events, in studying the origin of mineral deposits, and for summarizing regional mineralization and instructing regional prospecting. The eastern Liaoning region hosts the main concentration of boron resources in China. The boron reserve in eastern Liaoning… 相似文献
10.
A New Species of Cathayornis from the Lower Cretaceous of Inner Mongolia, China and Its Stratigraphic Significance 总被引：2，自引：1，他引：1
LI Jianjun LI Zhiheng ZHANG Yuguang ZHOU Zhonghe BAI Zhiqiang ZHANG Lifu BA Tuya 《《地质学报》英文版》2008,82(6):1115-1123
An incomplete postcranial avian skeleton is described from the Lower Cretaceous Jingchuan Formation of Otog Banner of western Inner Mongolia and referred to a new species of Cathayornis, C. chabuensis sp. nov. This is the first report of a Cathayornis from outside Liaoning Province. The new discovery indicates that Cathayornis coexisted with Otogornis genghisi, and a more detailed comparison between these two enantiornithine genera shows that Otogornis represents a more primitive genus than Cathayornis. Our analyses further indicate that Cathayornis is an arboreal bird. The discovery of a Cathayornis from this region also confirms that the avian fossil-bearing Jingchuan Formation is comparable to the Jiufotang Formation of the upper Jehol Group in western Liaoning, and should be referred to the middle-late Early Cretaceous. 相似文献
11.
辽宁省大地构造位置处于华北陆块北缘东段,省内金矿资源较为丰富.在研究典型金矿的基础上,总结了辽宁省金矿的成因类型、矿产预测类型以及金矿的时空分布规律.基于对辽宁省大地构造演化与金矿成矿关系的新认识,结合重大构造事件与金矿成矿效应的耦合关系,运用成矿系列理论揭示了省内金矿的成矿动力学演化机制,将全省金矿划分为3个成矿系列... 相似文献
12.
金刚石矿是辽宁省的重要矿产之一,辽宁瓦房店地区已探明的原生金刚石矿资源/储量占中国金刚石资源量的一半以上。通过开展三维建模工作,对该区金伯利岩管的形态、深部找矿方向等提出了一些新的认识。研究认为,三维模型可以更好地展示金伯利岩型金刚石矿体的空间展布形态,并可为勘查工作提出指导性意见。 相似文献
13.
基于GIS技术的矿产资源规划管理信息系统 总被引：5，自引：0，他引：5
结合正式颁布实施第一轮辽宁省矿产资源规划,论述了本系统通过对GIS功能和数据库功能的组合和集成,实现了分布式远程数据库管理,图形、文档指标3类数据的互动式管理,并支持空间数据的统计和分析,同时还可进行规划项目实施的远程办理,为矿产资源规划管理部门提供一种全新的宏观管理和决策支持的手段和依据. 相似文献
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15.
辽东不整合脉超大型铀矿床找矿前景分析 总被引：1，自引：0，他引：1
不整合脉超大型铀矿床是20世纪60年代后期在加拿大和澳大利亚发现的一种新类型.其最大特点是矿床均产于不整合面附近,矿床既大又富,矿床储量达数十万吨,品位最高达50%,是世界上经济效益很好的铀矿类型.辽东地区在前寒武纪地层内存在5个不整合面,且著名的连山关铀矿床产于元古宇-太古宇不整合面附近,具有不整合脉型铀矿的特征,显示出该区不整合脉超大型铀矿床较好的找矿前景.虽然20世纪90年代曾在该区进行过此类型找矿工作,但由于战略调整而停止.随着我国"十五"期间核电迅猛发展对铀矿资源的需求,继续开展该类型铀矿床的找矿工作具有重要的现实意义. 相似文献
16.
辽宁省金矿集中区及其与构造样式的关系 总被引：1，自引：0，他引：1
本文将辽宁省金矿划分四种类型,十个主要金矿集中区。这些集中区均受华北地台东西向基底构造活动带及中生代太平洋板块俯冲影响、所产生的北西向构造挤压带和北东向构造—岩浆岩带的复合作用控制。它们分别处于太不洋成矿带的内带(辽东)和外带(辽西)。并以郯庐断裂为轴线,构成了两大“U”字形,类似共轭曲线展布的构造样式。根据深部地球物理资料,综合分析了控制金矿集中区构造样式的形成机制。区内脉状金矿大都分布在深断裂(深度大于五公里断裂)带附近。 相似文献
17.
【研究目的】一直以来辽西牛营子凹陷油气勘探的目的层为中新元古界。由于构造抬升等因素,该凹陷地表未见辽西其他盆地出露的重要油气勘探层系—侏罗系北票组。【研究方法】本次通过辽凌地1井钻探,在牛营子凹陷中元古界碳酸盐岩推覆体下发现了一套厚层暗色泥岩,对其岩性及孢粉组合特征进行研究,并与辽西北票盆地实测的三宝四坑剖面北票组进行岩性组合对比。【研究结果】证实辽凌地1井中元古界碳酸盐岩推覆体以下厚层泥岩为侏罗系北票组。【结论】有机地球化学指标表明,该泥岩具有有机质丰度高、生烃潜力大的特点,是值得关注的优质烃源岩。该套厚层暗色沉积地层的发现表明侏罗系北票组是牛营子凹陷新的勘探层系,这一认识为研究辽西地区构造演化、油气地质条件提供了重要的基础地质资料。创新点：采用孢粉组合特征及岩性组合特征等方法确定辽凌地1井中元古界推覆体以下暗色泥岩为侏罗系北票组地层,依据地球化学指标确定该套地层为优质烃源岩。 相似文献