马门溪龙属(Mamenchisaurus)的分类位置及演化

文章对马门溪龙属（Ｍａｍｅｎｃｈｉｓａｕｒｕｓ）的分类位置进行了讨论，认为它应归属于勺齿蜥龙超科（Ｂｏｔｈｒｏｓａｕｒｏｐｏｄｏｉｄｅａ）中的马门溪龙科（Ｍａｍｅｎｃｈｉｓａｕｒｉｄａｅ），从而对蜥脚类科一级的分类提出了新的划分方案。文章还对马门溪龙属的演化进行了探讨，提出其祖先应为中侏罗世的峨眉龙属（Ｏｍｅｉｓａｕｒｕｓ）。     

四川盆地晚侏罗世蜥脚类一新种

文章记述了在四川盆地上侏罗统上沙溪庙组采到的一批巨型蜥脚类恐龙化石新材料,建立了一新种——井研马门溪龙（Ｍａｍｅｎ－ｃｈｉｓａｕｒｕｓｊｉｎｇｙａｎｅｎｓｉｓｓｐ．ｎｏｖ．）。新种的发现进一步证明马门溪龙属（ＭａｍｅｎｃｈｉｓａｕｒｕｓＹｏｕｎｇ,１９５４）及马门溪龙科（ＭａｍｅｎｃｈｉｓａｕｒｉｄａｅＹｏｕｎｇｅｔＣｈａｏ,１９７２）的分类位置应归勺齿蜥龙超科（Ｂｏｔｈｒｏｓａｕｒｏ－ｐｏｄｏｉｄｅａＹｏｕｎｇ,１９５８）。     

中国恐龙足迹类群

对在中国发现的恐龙足迹化石从产地与层位上进行了分类比较，并较为系统地将它们按产地和层位划分出不同的类群；同时，对形成恐龙足迹的古生态，古环境作了进一步的探讨，本文将中国恐龙足迹归结为如下类群：（1）晚三叠世恐龙足迹类群（Dinosaur Footprint Group of Late Triassic Epoch)；（2）早侏罗世恐龙足迹类群（Dinosaur Footprint Group of Early Jurassic Epoch)；（3）中株罗世恐龙足迹类群（Dinosaur Footprint Group of Middle Jurassic Epoch)；（4）晚侏罗世恐龙足迹类群（Dinosaru Footprint Group of Late Jurassic Epoch);(5)早白垩世恐龙足迹类群（Dinosaur Footprint Group of Early Cretaceous Epoch)；（6）晚白垩世恐龙足迹类群（Dinosaur Footptint Group of Late Cretaceous Epoch)。     

山东侏罗—白垩纪地层划分与对比

山东中生代地层主要发育侏罗系和白垩系,沂沭断裂带以西的鲁西南、鲁中、鲁北地区发育侏罗纪至早白垩世地层,而断裂带以东的鲁东地区主要发育白垩纪地层。用古生物、火成岩年代分析结果对山东侏罗－白垩系地层进行了划分和对比。将沂沭断裂带以西的坊子组归于早－中侏罗世,三台组归于中侏罗世,分水岭组暂归于晚侏罗世至早白垩世,西洼组归地早白垩世;将沂沭断裂带以东的莱阳组和青山组归于早白垩世,王氏组归于晚白垩世。     

山西天镇晚白垩世一新甲龙

记述了发现于山西省天镇县上白垩统灰泉堡组一中等大小,体长约５ｍ,归属甲龙科的一新属种－－杨氏天镇龙（Ｔｉａｎｚｈｅｎｏｓａｕｒｕｓ ｙｏｕｎｇｉ ｇｅｎ．ｅｔ．ｓｐｎｏｖ．）,该属种与蒙古南戈壁省耐梅盖特（Ｎｅｍｅｇｔ）盆地上白统巴鲁恩戈约特组（Ｂａｒｕｎ ｇｏｙｏｔ ｆｏｒｍａｔｉｏｎ）中的库尔三美丽龙（Ｓａｉｃｈａｎｉａ ｃｈｕｌｓａｎｅｎｓｉｓ）较相近,但以其头骨较小,呈长等腰三角形,前上颌     

早白垩世热河群暴龙类化石及其演化意义

暴龙超科恐龙是晚白垩世陆地生态系统的优势生物,曾广泛分布于劳亚古大陆,甚至作为冈瓦纳古大陆一部分的澳洲也有其化石的发现。最早的暴龙超科发现于中-晚侏罗世,如五彩冠龙(guanlong wucaii),并在白垩纪早-中期迅速分化,一些巨型暴龙超科如雷克斯暴龙(tyrannosaurus rex)、勇士特暴龙(tarbosaurus bataar)、强壮惧龙(daspletosaurus torosus)等,在晚白垩世成为处于食物链顶端的强大掠食动物。而热河群暴龙超科的发现为进一步了解暴龙超科早期演化提供了机会,该文总结近几年来辽西热河群暴龙超科恐龙化石:奇异帝龙、华丽羽王龙、喀左中国暴龙,并分析其在暴龙超科早期演化及鸟颈类主龙演化中的意义。     

山东侏罗 - 白垩纪地层划分与对比

山东中生代地层主要发育侏罗系和白垩系,沂沭断裂带以西的鲁西南、鲁中、鲁北地区发育侏罗纪至早白垩世地层,而断裂带以东的鲁东地区主要发育白垩纪地层。用古生物、火成岩年代分析结果对山东侏罗白垩系地层进行了划分和对比。将沂沭断裂带以西的坊子组归于早中侏罗世,三台组归于中侏罗世,分水岭组暂归于晚侏罗世至早白垩世,西洼组归于早白垩世;将沂沭断裂带以东的莱阳组和青山组归于早白垩世,王氏组归于晚白垩世。     

中国中生代反鸟类研究概述

对发现于中国中生代地层中的反鸟类化石进行了简单的总结.化石的系统分析表明,从晚侏罗世到早白垩世存在的反鸟亚纲的成员不仅数量多,而且存在较大的分异,与今鸟类存在较大的差异.它们繁盛于早白垩世,灭绝于晚白垩世.     

内蒙古二连盆地的构造反转历史

二连盆地中生代经历了复杂的发育历史,是一个多期叠加的盆地系统,它经历了早—中侏罗世的小规模断陷盆地;晚侏罗世的构造反转盆地(伴随着强烈的火山作用);早白垩世的大规模断陷盆地及早白垩世晚期的构造反转等盆地发展阶段;晚白垩世以来本地区处于整体隆升状态。     

大港探区中生代原型盆地恢复及成盆模式

对大港探区中生代残留盆地进行原型盆地恢复．原型盆地可分为：早中侏罗世坳陷型盆地,晚侏罗至早白垩世断坳共存盆地及晚白垩世热坳陷盆地．中生代原型盆地分布方向为ＮＥ－ＮＮＥ向,分布范围有限,且沉积厚度较小,这与中生代中国东部受伊泽奈崎板块斜向俯冲和华北与扬子板块碰撞所致的挤压环境有关     

华北东部侏罗—白垩纪原型盆地及其演化

在残留盆地展布、地层发育特征以及控盆因素分析的基础上,恢复了华北东部侏罗—白垩纪的原型盆地格局。研究表明,早—中侏罗世,华北东部处于古亚洲构造域向滨太平洋构造域演化的过渡阶段,为弱挤压成盆期,发育中小型山间盆地,早期盆地走向以近EW向为主,晚期NNE向盆地更为发育;盆地早期的沉积表现为对印支期造成的低洼地区的充填,晚期则表现为披覆式沉积。晚侏罗—早白垩世,华北东部构造演化主要受滨太平洋构造域的控制,进入大规模裂陷或断陷盆地发育阶段,火山活动强烈,原型盆地的展布具有明显分区性,受NW/NWW向、NE/NNE向断裂系统的控制,拉张断陷、拆离断陷、反转断陷及走滑拉张型盆地在不同的地区分布。晚白垩世,华北东部隆起剥蚀,仅少数地区沉积充填。     

巴彦浩特盆地沉降史分析

运用回剥分析技术对巴彦浩特盆地的沉降史作了定量方面的研究，认为巴彦浩特盆地是在早古生代的古隆起基础上发育起来的，共经历了两个隆升期和三个沉降期，两个隆升期是：三叠纪—早侏罗世、晚白垩世；三个沉降期是：志留纪—二叠纪、中侏罗世—早白垩世及第三纪—第四纪．相应地形成了四种类型的盆地，即志留纪—二叠纪前陆盆地（南部坳陷带）、石炭纪—二叠纪裂陷槽（东部坳陷带及其以东地区，为贺兰裂陷槽的一部分）、中侏罗世—早白垩世断陷盆地及新生代的坳陷盆地．晚古生代时，沉降主要发生在盆地的南部坳陷带及东部坳陷带内，侏罗纪时，南部坳陷带隆起，西部坳陷带及东部坳陷带为主要沉降区，受断陷活动控制，其间为中央隆起带分隔．早白垩世盆地全面下沉，成为统一盆地     

华北东部侏罗—白垩纪盆地演化及其对构造运动的响应

华北东部侏罗—白垩纪盆地演化的阶段性反映了燕山运动的幕式过程.在华北东部侏罗—白垩纪残留盆地分布、沉积充填特征研究的基础上,结合区域构造演化背景,恢复了晚中生代华北东部的原型盆地格局.结果表明:早—中侏罗世华北东部处于由古亚洲构造域向滨太平洋构造域演化的过渡阶段,早期发育一些小的山间沉积盆地群,表现为对印支期造成的低洼地区的充填,晚期表现为披覆式沉积;晚侏罗世进入中生代重要的构造转折期,华北东部构造演化受控于西太平洋区板块活动,晚侏罗—早白垩世伸展断陷盆地发育,盆地的展布具有明显的分区性,沉积充填受北东—北北东向和北西—北西西向断裂系统控制;晚白垩世,郯庐断裂带以西的华北东部地区持续隆升,仅局部洼陷有红色碎屑沉积充填.     

Mesozoic basin development and its indication of collisional orogeny in the Dabie orogen

The Dabie orogen underwent deep continental subduction, rapid exhumation, and the huge amount of erosion during the Mesozoic. Its tectonic evolution, especially how its evolution was recorded by sedimentary basins at the flanks of the Dabie orogen is one of the most important issues of the world’s attention. These years, newly studies of basin sedimentology, combined with structural geology, have shown a fundamental progress. The overall distribution of different basin types in the orogen indicates that shortening and thrusting at the margins of the orogen from the Late Triassic to the Early Cretaceous controlled the foreland basins, and extension, doming and rifting were initiated in the core of the orogen from the Jurassic to the Early Cretaceous and were expanded to the whole orogen after the Late Cretaceous. Therefore, The Dabie orogen records gradual transition from overall shortening and thrusting to dominantly extension and rift basin formation expanded from its core to its margins, although these shortening and extension overlapped in time from the Jurassic through Early Cretaceous at crustal levels. The unroofing ages of the ultra-high pressure (UHP) metamorphic rocks in the Dabie orogen change from Early Jurassic to Late Jurassic westward. The depth of exhumation increases eastwards. The sediment sources for the Hefei basin are mostly composed of the deeply exhumed, axial Dabie metamorphic complex, and the sediment sources for the Middle Yangtze basin are mostly from cover strata in the southern orogen and related strata with subjacent (i.e. subsequently overthrusted) Mianlue suture belt. Geodynamic analysis represents that continental collision between the North China Block and the South China Block along the Shangdan and Mianlue sutures, subsequently northwestward progradation of the Jiangnan fold and thrust belt, and the underthrusting of the North China Block along the Northern Boundary Fault of Qinling Range led to crustal thickening, gravitational spreading and balanced rebound of the resultant thick crustal welt, and multi-episodic exhumation of the HP/UHP metamorphic rocks. The future studies by the methods of tracing the Dabie orogeny through deposition in the marginal basins should focus on eastward extension of the Mianlue suture, thrust and overlap of the Dabie HP/UHP metamorphic block on different lithotectonic zones and basins along the northern South China Block, the structural framework of the source area of the basins in the syn-depositional stage, the basin lateral extension, huge amount of erosion and sediment transportation from the Dabie blanket and basement rocks, and recovery of subducted and re- moved structural units within the Dabie orogen, etc.     

辽西冀北晚中生代的化石蜥蜴类(爬行纲:有鳞目)

个蜥矢部部龙趾大具有辽西冀北晚中生代已记录的蜥蜴类化石共4属5种,及2个未命名属种。这些化石自下而上可划分4蜴类化石带：中侏罗世杨氏矢部龙带(Yabeinosaurus youngi Zone)、早白垩世早期长趾大凌河蜥-细小龙组合带(Dalinghosaurus longidigitus-Yabeinosaurus tenuis Assemblage Zone)、早白垩世早期细小矢带(Yabeinosaurus tenuis Zone)及早白垩世晚期炭德氏蜥带(Teilhardosaurus canbonarius Zone)凌河蜥-细小矢部龙组合带中的蜥蜴类属种最为丰富且分布较广,为研究早期蜥蜴类的地理地史分重要价值。布长等     

The existing time of Sihetun vertebrate in western Liao- ning, China---Evidence from U-Pb dating of zircon

In different opinions, the stratigraphic time of the feathered dinosaurs and early birds in Sihetun and its neighboring areas in Beipiao, western Liaoning is appointed to different epoches of eras, such as Late Jurassic, Early Cretaceous and Late Jurassic-Early Cretaceous. Even the recently dating data are still very different. This note first reported the U-Pb age of (125.2±0.9) Ma of zircon separated from tuff of Sihetun vertebrates horizon. The age reveals that Sihetun vertebrate belongs to Early Cretaceous. The method is more objective, because of the strong ability of disturbance resistance and high U-Pb blocking temperature of zircons.     

The existing time of Sihetun vertebrate in western Liaoning, China

In different opinions, the stratigraphic time of the feathered dinosaurs and early birds in Sihetun and its neighboring areas in Beipiao, western Liaoning is appointed to different epoches of eras, such as Late Jurassic, Early Cretaceous and Late Jurassic-Early Cretaceous. Even the recently dating data are still very different. This note first reported the U-Pb age of (125.2±0.9) Ma of zircon separated from tuff of Sihetun vertebrates horizon. The age reveals that Sihetun vertebrate belongs to Early Cretaceous. The method is more objective, because of the strong ability of disturbance resistance and high U-Pb blocking temperature of zircons.     

New fossil elaterid (Coleoptera: Polyphaga: Elateridae) from Yixian Formation of western Liaoning, China

A new species of the elaterid genus Cryptocoelus Dolin and Nel, 2002 from the Late Jurassic to Early Cretaceous Yixian Formation in the western Liaoning, China is described. Diagnosis of the genus is revised, and the systematic position of the genus is briefly discussed. Because the elaterids originated in the Early to Mid-Jurassic, this new material from the Late Jurassic-Early Cretaceous will enhance our understanding of the transition between ancient elaterids and extant ones, bridge the gap of cryptic relationships between the Mesozoic cupedids and elaterids, and expand our knowledge of their evolutionary history.     

New fossil elaterid (Coleoptera: Polyphaga: Elateridae) from Yixian Formation of western Liaoning, China

A new species of the elaterid genus Cryptocoelus Dolin and Nel, 2002 from the Late Jurassic to Early Cretaceous Yixian Formation in the western Liaoning, China is described. Diagnosis of the genus is revised, and the systematic position of the genus is briefly discussed. Because the elaterids originated in the Early to Mid-Jurassic, this new material from the Late Jurassic-Early Cretaceous will enhance our understanding of the transition between ancient elaterids and extant ones, bridge the gap of cryptic relationships between the Mesozoic cupedids and elaterids, and expand our knowledge of their evolutionary history.