甘肃漳县王家店组孢子组合及其时代

本文首次报道甘肃漳县大草滩王家店组发现的丰富的化石孢子研究结果。在王家店组除孢子外,还发现少量疑源类(Acritarchs)和虫颚化石(Scole-codonts)。本文图示14个孢子属,23种和变种(包括未定种),根据孢子在地层中分布规律和演化特征,自下而上可划分为两个孢子带,下带称Retispora lepido-phyta-Knoxisporites literatus(LL)带,上带称Retispora lepidophyta-Hymenozonotrletes explanatus(LE)带。 甘肃漳县大草滩王家店组孢子带可以与华南和西藏珠穆朗玛峰地区的孢子带比较,同时可与西欧(Clayton et al,Higgs et al. ,1987)晚泥盆世晚期的Retis-pora lepidophyta-Knoxisporites literatus(LL)带和Retispora lepidophyta-Hymenozonotriletes explanatus(LE)带比较,时代为晚泥盆世晚期斯特隆阶(Strunian)早中期。     

扬子地台西缘石棉田湾矿区地层研究新进展

四川石棉矿区地层研究取得以下新进展：１）田湾矿区赋矿层时代原定为中泥盆世,该地层中发现晚震旦世疑源类化石,因而赋矿层时代为晚震旦世;２）矿区缺失早震旦世沉积,仅发育晚震旦世的观音崖组和灯影组;３）田湾方家山赋矿层原定为中晚泥盆世河心组,据发现的疑源类化石,应属晚震旦世灯影组;４）田湾杜河坝东侧原认为上三叠统河湖相的白果湾组,据有机质判定为海相沉积,时代暂属中元古代,称茨竹坪组。     

云南施甸晚志留世－早泥盆世孢子和疑源类（ACRITARCHS）

本文首次报道在滇西施甸向阳寺剖面晚志留世－早泥盆世地层中发现孢子和疑源类，根据孢子特征及其在地层中的分布和演化规律，自下而上可划分出３个孢子带：１．Ａｐｉｃｕｌｉｒｅｔｕｓｉｓｐｏｒａｓｐｉｃｕｌａ－Ｅｍｐｈａｎｉｓｐｏｒｉｔｅｓｎｅｇｌｅｃｔｕｓ（ＳＮ）带；２．Ｓｙｎｏｒｉｓｐｏｒｉｔｅｓｖｅｒｒｕｃａｔｒｓ－Ｓｔｒｅｅｌｉｓｐｏｒａ（ＶＮ）带；３．Ｂｒｅｃｏｎｉｓｐｏｒｉｔｅｓｂｒｅｃｏｎｅｎｓｉｓ－Ｃｙｍｂｏｓｐｏｒｉｔｅｓｄｉｔｔｏｎｅｎｓｉ（ＢＤ）带。滇西施甸晚志留世－早泥盆世孢子带可与滇东曲靖     

新疆三塘湖盆地老爷庙组古植物特征及其时代

老爷庙组的命名者认为这套地层属于泥盆—石炭系过渡层，在地质图上标为早石炭世。新材料表明，植物大化石Ｌｅｐｔｏｐｈｌｏｅｕｍｒｈｏｍｂｉｃｕｍ－Ａｒｃｈａｅｏｐｔｅｒｉｓｆｉｓｉｌｉｓ－Ｃｙｃｌｏｓｔｉｇｍａｓｐ．组合的时代应属晚泥盆世晚期，孢子化石Ｒｅｔｕｓｏｔｒｉｌｅｔｅｓｓｉｍｐｌｅｘ－Ａｐｉｃｕｌｉｔｕｓｉｓｐｏｒａｈｕｎａｎｅｎｓｉｓ（ＳＨ）组合显示的时代也为晚泥盆世晚期，从而纠正了这一地层属于泥盆—石炭系过渡层的观点。     

河南信阳群南湾组化石孢子的发现及其地质意义

作者在河南信阳附近信阳群南湾组中、上部的轻变质灰色砂板岩中发现了丰富的孢子,此外还有疑源类(Acritarchs),几丁虫(Chitinozoans)和虫颚(Scolecedonts)化石。该孢子组合可与华南和西秦岭中泥盆世晚期和晚泥盆世早期孢子组合比较,亦可与西欧、北美和苏联中泥盆世晚期季维特阶(Givetian)和晚泥盆世早期弗拉斯阶(Frasnian)比较,其时代为中泥盆世晚期至晚泥盆世早期。 信阳群南湾组微体化石的发现不仅解决了长期争论的信阳群南湾组的时代问题,而且对秦岭和大别山构造带的区域地质调查和构造带的演化研究都具有重要意义。     

河南西峡地区二郎坪群火神庙组中发现泥盆纪孢子化石

在河南省西峡地区二郎坪群火神庙组粉砂质板岩中发现丰富的陆生植物孢子(Spores)、少数疑源类(Acritarchs)和极少数几丁虫(Chitinozoa)化石.该化石孢子组合可与中国华南、西南地区和西秦岭中泥盆世早期孢子组合比较,亦可与西欧和北美中泥盆世早期的孢子带比较,时代为中泥盆世,并有可能为中泥盆世早期,相当于西欧艾菲尔期(Eifelian).     

新疆塔里木盆地西—西南缘泥盆—石炭纪四射珊瑚

塔里木盆地西—西南缘石炭纪地层层序清楚,化石丰富,是新疆研究石炭系的良好地区之一。目前海相泥盆纪地层中有化石佐证的只有中泥盆世,而早泥盆世地层存在与否尚难定论。描述珊瑚计22属22种。中泥盆统3属3新种,石炭纪19属12新种。塔里木盆地西—西南缘的中泥盆统称克孜勒陶组,上泥盆统为奇自拉夫组,属陆相沉积。石炭系自下而上为下统库山河组、克里塔克组、和什拉甫组;中统卡拉乌依组、阿孜干组;上石炭统塔哈奇组、克孜里奇曼组。     

塔里木盆地早三叠世疑源类的发现

笔者根据孢子花粉的研究，首次确定了塔里木盆地钻井中三叠系的存在。在早三叠世孢子花粉组合中共生了以具刺的Ｖｅｒｙｈａｃｈｉｕｍ和Ｍｉｃｒｈｙｓｔｒｉｄｉｕｍ为主的疑源类化石，共有１２个属，１１个老种和２个新种。该盆地下三叠统过去认为是陆相沉积，而具刺疑源类是生长在海水中的浮游生物，因此具剌疑源类的广泛发现，说明该盆地早三叠世沉积时，距海较近，有海水侵入。     

九瑞矿集区志留纪西坑组疑源类化石和碎屑锆石年代学研究及其地层意义

九瑞矿集区是长江中下游成矿带中一个最重要的铜金多金属矿集区,区内发育了城门山铜矿、武山铜矿、洋鸡山金矿等重要的多金属矿床。本文对该区域的城门山和望夫山两个剖面的疑源类化石及碎屑锆石开展了详细研究,在城门山剖面原来被认为是志留纪西坑组的地层中发现了化石面貌为新元古代或早寒武世的化石,结合碎屑锆石U-Pb定年工作,推测其时代为早寒武世,该地层与上覆地层泥盆系五通组之间存在一个明显的角度不整合。望夫山剖面仍旧为正常志留纪西坑组地层,疑源类化石和碎屑锆石U-Pb年代学研究表明九瑞西坑组沉积时代应该晚于特列奇阶。九瑞矿集区“扬子抬升”的开始时间应该晚于特列奇阶,结束时间应该晚于中泥盆世早期。     

青海北部早三叠世下环仓组孢粉组合

青海北部下环仓组孢粉组合,共计孢子花粉４３属７３种,其中包括１个新种,６个相似种、疑源类１１属。组合以Ｐｕｎｃｔａｔｉｓｐｏｒｔｔｅｓ－Ｌｕｎｄｂｌａｄｉｓｐｏｒａ－Ｃｙｃａｄｏｐｉｔｅｓ－Ｍｉｃｒｈｙｓｔｒｉｄｉｕｍ较多为特征,地质时代为旱三叠世期。     

冀北滦平盆地大北沟组叶肢介化石研究新进展

系统研究了采自滦平盆地火斗山乡张家沟剖面大北沟组(J3d)的叶肢介化石4属22种(包括11个新种)。其中,Nestoria属占绝对优势,并贯穿整个大北沟组,故大北沟组可称为Nestoria群。在该剖面大北沟组首次发现了Jibeilim-nadia属和Keratestheria属,分别产于该组下部和上部,可将Nestoria群进一步划分为下部Nestoria-Jibeilimnadi组合(带)和上部Nestoria-Keratestheria组合(带)。另外,在张家沟剖面大北沟组上部首次发现了中侏罗统土城子组中的重要分子cf.Pseudograpta属,进一步证明了大北沟组的叶肢介动物群与土城子组的叶肢介关系密切,具有重要的时代意义。     

湘中地区船山组四射珊瑚新属种

湘中地区船山组含丰富的四射珊瑚化石,主要为地方性分子,其发展具有明显的阶段性:下部主要为单体双带型珊瑚及互嵌状复体珊瑚;中部以单体三带型珊瑚和Kepingophyllidae科的原始分子繁衍为特征;而在上部,Kepingophyllidae科的进化分子非常繁盛,并出现了一些早二叠世的分子,如Vesotabularia,Lonsdaleiastraea。这些阶段性的变化对揭示石炭纪和二叠纪四射珊瑚的演化具有重要意义。 笔者在船山组中上部建立了两个四射珊瑚组合,自下而上为:（1）Eokepingophyllum-Qinglongshanophyllum组合; （2）Kepingophyllum-Parawentzellophyllum组合。此外,描述1新属Paraivanovia及10新种。     

江苏东台廉贻地区大湾组动物群的发现及其意义

<正> 1979年,在东台县廉贻公社张岳庄村边的荻3井2747—2827.5米井段钻遇一套灰岩地层,在岩芯中,陈永祥首次发现三叶虫和腕足类化石,古生物组确定该段地层为大湾组。我们对该井段的岩芯和岩屑进行了系统分析,获得了多种化石。其中大湾组牙形刺14属16种(包括4个未定种),三叶虫5属5种(包括1个未定种),腕足类5属,腹足类2属,     

西秦岭关家沟组晚奥陶世苔藓植物孢子和陆生维管束植物小孢子化石

西秦岭文县东峪口—关家沟一带分布的关家沟组为一套粗碎屑流和浊流沉积组合,因缺乏古生物化石,其形成时代长期存在争议。在文县关家沟滴水岩剖面中、下部4件灰色粉砂质板岩样品中分离并鉴定出了晚奥陶世苔藓植物孢子(隐孢子)(cryptospores)和陆生维管束植物小孢子(miospores)化石8属18种(包括未定种)、疑源类(acritarchs)8属10种、几丁虫(chitinozoa)3属4种和虫颚(scolecodonts)3属3种,这些微体化石的地质时代相当于西欧Carodoc-Ashgill阶。在这些样品中发现苔藓植物孢子和早期陆生维管束植物小孢子,不仅是中国奥陶纪地层中首次发现和报道,而且也为研究早期陆生植物演化提供新的直接依据。     

New Bradoriid Arthropods from the Early Cambrian Balang Formation of Eastern Guizhou, South China

The Early Cambrian Balang Formation is comprised of mudrock and shale, which was deposited in a shelf environment in the eastern part of Guizhou, south China. The Balang Fauna, which consists of seven phyla, occurs in the middle and upper parts of the Balang Formation. Arthropods are important constituents of the Balang Fauna and include a great number of trilobites, large bivalved arthropods, and newly-discovered well-preserved bradoriid fossils. The bradoriids present include three genera and four species : Comptaluta inflata (Cheng, 1974) emend Hou et al., 2002; Comptaluta kailiensis sp. nov., and Alutella elongeta sp. nov., Aluta sp. This faunal assemblage in the Balang Formation is distinguished from the Tsunyiella Chang, 1964, Songlinella Yin, 1978 and Kunmingella Hou, 1956 assemblage which occurs in the Niutitang and Mingxinsi formations of the Yangtze Platform in middle region of Guizhou and which is earlier than the Balang Formation in age. However, this assemblage resembles the Comptaluta pik, 1968 assemblage from the Early Cambrian Heilinpu Formation in Wuding County, Yuanan Province and from the Ordian Stage of the Cambrian of Australia. The great abundance of Comptaluta pik, 1968 and overall taxonomic diversity of the Comptaluta pik, 1968 assemblage set it distinctly apart from the Alutella Kobayashi et Kato, 1951 and Aluta Hou, 1956 assemblages of the Balang Formation. Alutella Kobayashi et Kato, 1951 and Aluta Hou, 1956 also occur in the Early Cambrian Niutitang Formation of the Yangtze Platform of Guizhou. Individual Bradoriids from the Balang Formation are characterized by large size (3 mm). The discovery of new Bradoriid assemblages not only expands the group’s geographical range and assemblage affinities, but also indicates that Bradoriids migrated eastward from shallow-water to deeper-water environments during the Early Cambrian, indicating that they were capable of life in deeper-water, and adaptation to a new ecological setting.     

Cephalopods of the ＂Falang Formation＂ （Triassic） from Guanling and Zhenfeng Counties, Guizhou Province, China

The “Falang Formation“ of western Guizhou was previously called the “Halobia Bed“ and considered to be Ladinian in age. It was subdivided upward into the Zhuganpo, Laishike and Longchang members based on ammonites and the Trachyceras multitubertulatum Zone of the Longchang Member was put in the Lower Camian. Here in the present paper, 4 genera and 9 species of ammonites and I nautiloid genus and species collected from the upper part of the “Falang Formation“ (i.e. the Wayao Formation used in this paper, equivalent to the Laishike Member from Guanling and Zhenfeng counties are described. The geological and geographical distribution of these cephalopods, as well as the co-existing conodonts, put the Wayao Formation to the late early Camian.     

Cephalopods of the “Falang Formation” (Triassic) from Guanling and Zhenfeng Counties, Guizhou Province, China

The "Falang Formation" of western Guizhou was previously called the "Halobia Bed" and considered to be I .adinian in age. It was subdivided upward into the Zhuganpo, Laishike and Longchang members based on ammonites and the Trachyceras multitubertulatum Zone of the Longchang Member was put in the Lower Carnian. Here in the present paper, 4 genera and 9 species of ammonites and 1 nautiloid genus and species collected from the upper part of the "Falang Formation" (i.e. the Wayao Formation used in this paper, equivalent to the Laishike Member from Guanling and Zhenfeng counties are described. The geological and geographical distribution of these cephalopods, as well as the co-existing conodonts, put the Wayao Formation to the late early Carnmian.     

贵州紫云石头寨晚二叠世—中三叠世牙形石动物群及生态意义

本文所研究的贵州紫云石头寨上二叠统长兴组—中三叠统新苑组牙形石,共计5属14种,其中Hindeodus julfensis在华南系首次发现。文中对下三叠统罗楼组上部—中三叠统新苑组下部共建立了3个牙形石带,它们是Neospathodus timorensis带、Neogondolella regale带和N.constricta带。其中N.regale在华南属首次报导。此外就N.timorensis带的时代归属作了讨论,认为该带应属早三叠世晚期。而N.regale带为安尼阶最下部的牙形石带。文中还对牙形石的生态作了初步探讨。     

新疆准噶尔盆地东缘下石炭统滴水泉组孢粉组合

新疆准噶尔盆地东缘克拉美丽地区双井子剖面滴水泉组孢粉组合中有孢粉化石２９属３０种，具环孢占优势，含量为５７．９％，其中Ｃｒａｓｓｉｓｐｏｒａ（２３．６％）、Ｓｔｅｎｏｚｏｎｏｔｒｉｌｅｔｅｓ（１４．３％）的含量最高；无环孢居次，含量为３４．５％，以Ｐｕｎｃｔａｔｉｓｐｏｒｉｔｅｓ（１２％）和Ｅｅｉｏｔｒｉｌｅｔｅｓ（７．１％）为主。地质时代为早石炭世晚期，可能属韦宪期早期，大致相当于甘肃靖远臭牛沟组下段Ⅰ孢子组合带和西欧的Ｐｕ孢子组合带。当时为亚热带温暖湿润气候。     

吉林中部中—上志留统三叶虫动物群

描述了吉林中部永吉县中—上志留统张家屯组与二道沟组的三叶虫群6科的10属、12种及2未定种,其中新属3个、新种8个,并简要讨论了华北板块北缘三叶虫群的生物古地理特征。