检索结果-南通市图书馆

A new method to prepare clean cuticular membrane from fossil leaves with thin and fragile cuticles

Science china Earth sciences 2011年第2期54卷 223-227页

作者： wang li1,2.& leng qin1,3 1 {2. key laboratory of Palaeobiology and stratigraphy,nanjing institute of geology and palaeontology,chinese academy of sciences,nanjing 2.0008,china 2.Graduate School of chinese academy of sciences,Beijing 100049,china 3 Department of Science and Technology,Bryant University,Smithfield RI 02.17,USA 1. state key {2. of Palaeobiology and stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing 210008 China2. Graduate School of Chinese Academy of Sciences Beijing 100049 China3. Department of Science and Technology Bryant University Smithfield RI 02917 USA

Leaf cuticle analysis has long been a powerful tool for fossil plant identification, systematics, and palaeoclimatological recon- struction. In recent decades the application of stomatal frequency data that are relied on precise calculation of stomata on plant fossil cuticles to reconstruct ancient atmospheric CO2.concentration made the preparation of cuticular membrane with sufficient size a critical technique in palaeoclimatological research. However, for plants with originally thin and fragile cuticles, e.g., most deciduous plants, conventional techniques sometimes fail to obtain cuticular membranes with sufficient size, or sometimes unable to recover any. This has largely hampered the usage of fossil cuticle analysis in palaeobotanical and palaeo- climatological research. Here, we describe a new method using clear nail polish as a medium to ＂strengthen＂ the originally thin and fragile cuticles prior to maceration procedures. We demonstrate the method by using middle Eocene Metasequoia fossils that were notorious for the difficulty of recovering large-sized clean cuticular membranes due to their thin and fragile nature. Metasequoia, with well-documented and widely-distributed fossil records since the Late Cretaceous and with a living repre- sentative, 114. glyptostroboides, as a comparative reference, bas been widely used as a model genus for the study of evolution of plants, palaeoclimatological reconstruction, and plant adaptation to climate changes. But its deciduous habit produces thin cuticles and makes the preparation of clean cuticular membranes a tedious process. The new method successfully allows us to recover its delicate cuticular membranes with sufficient sizes for SEM observation and stomatal frequency analysis.

关键词： fossil leaf cuticle Metasequoia new method thin and fragile cuticle SEM observation stomatal frequency CO2

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Further Morphological Evidence of the Affinity Between Paomu Tree and Fossil Metasequoia and Its Environmental Implication

引用

地学前缘 2009年第S1期16卷 258-258页

作者： li wang~(1,2.,{2. leng~1 1.state key laboratory of Palaeobiology and stratigraphy,nanjing institute of geology and palaeontology,chinese academy of sciences,nanjing 2.0008,china. 2.Graduate School of the chinese academy of sciences,Beijing 100049,china

Leaves of a Metasequoia glyptostroboides tree in Paomu Village,Longshan County,Hunan Province (Paomu Tree) possess"Even Type"cuticles and frill-margined stomata similar to those of fossil Metasequoia by far known but different from all other living Metasequoia trees(common trees).Paomu Tree is thus hypothesized as the real"living fossil",which has been supported by preliminary DNA analyses. Techniques of clearing leaf,epidermis stripping,

关键词： Metasequoia Paomu Tree living fossil fossil affinity environment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Cretaceous integrative stratigraphy,biotas,and paleogeographical evolution of the qinghai-Tibetan Plateau and its surrounding areas

引用

Science china Earth sciences 2024年第4期67卷 1229-1289页

作者： Dangpeng XI Guobiao li Shijun JIANG Xin RAO Tian JIANG Tianyang wang Zuohuan {2. Yasu wang Jianzhong JIA Muhammad KAMRAN Zhongye SHI Yuyang WU Panxi wang lixin SUN {2.ggao ZENG Xiaoqiao WAN state key {2. of Biogeology and Environmental geology China University of GeosciencesBeijing 100083China College of Oceanography Hohai UniversityNanjing 213200China key laboratory of Palaeobiology and Petroleum {2. Nanjing Institute of Geology and PaleontologyChinese Academy of SciencesNanjing 210008China state key {2. of Tibetan Plateau Earth System Environmentand Resources(TPESER)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China china National Offshore Oil Corporation limited Beijing 100028China Shanghai Science and Technology Museum Shanghai 200120China Xizang Bureau of Geological and Mineral Exploration and Development Lhasa 850000China Tianjin Geological Survey Center of china Geological Survey Tianjin 300170China

The Cretaceous Period is a vital time interval in deciphering the evolutionary history of the Neo-Tethys Ocean and the convergence of different plates and blocks across the qinghai-Tibetan Plateau.A detailed stratigraphic framework and paleogeographic patterns are the basis for understanding the evolution of the Neo-Tethys Ocean and the formation of the qinghaiTibetan ***,the Cretaceous {2.,biota,paleogeography,and major geological events in the qinghai-Tibetan Plateau are analyzed to establish an integrative stratigraphic framework,reconstruct the paleogeography during the Cretaceous Period,and decode the history of the major geological *** Cretaceous rocks of the qinghai-Tibetan Plateau and its surrounding area are predominantly marine deposits,with a small amount of interbedded marine-terrestrial and terrestrial *** Indus-Yarlung Tsangpo Suture Zone was responsible for the deposition of deep marine sediments dominated by ophiolite suites and radiolarian *** the south,the Tethys Himalayas and Indus Basin received marine sediments of varying depths and lithology;to the north,the Xigaze and Ladakh forearc basins are also filled with marine *** Lhasa Block,Karakorum Block,western Tarim Basin,and West Burma block consist of shallow marine,interbedded marine-terrestrial,and terrestrial *** Qiangtang Basin and other areas are dominated by terrestrial *** Cretaceous strata of the qinghai-Tibetan Plateau and its surrounding areas are widely distributed and diversified,with abundant foraminifera,calcareous nannofossils,radiolarians,ammonites,bivalves,and *** the basis of integrated lithostratigraphic,biostratigraphic,geochronologic,and chemostratigraphic analyses,we proposed herein a comprehensive stratigraphic framework for the Cretaceous Period of the eastern *** analyzing the Cretaceous biota of different biogeographic zones from eastern Neo-Tethys and its surrounding a

关键词： qinghai-Tibetan Plateau Tethys Cretaceous stratigraphy Biota Paleogeography

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Paliurus(Paliureae,Rhamnaceae) from the Miocene of East {2. and its Macrofossil-based Phylogenetic and Phytogeographical History

引用

Acta Geologica Sinica(English Edition) 2014年第5期88卷 1364-1377页

作者： li Xiangchuan wang Haofei {2. qin XIAO liang GUO Junfeng HE Wenlong College of Earth sciences and Resources & key {2. of Western Mineral Resources and Geological Engineering of the Ministry of Education Chang'an University School of Earth sciences & key {2. of Mineral Resources of Western china Lanzhou University laboratory of Terrestrial Environments Department of Science and TechnologyCollege of Arts and SciencesBryant UniversitySmithfieldRI 02917USA College of geology and Environment Xian University of Science and Technology

The extant genus Paliurus Miller is divided into P. ramosissimus and P. spina-christi groups and is diagnostically characterized by distinctive orbicular-winged fruits with a trilocular （or often bilocular） ovary and basally triveined leaves with a subentire to serrate margin. Here, structurally preserved winged fruits and associated compressed leaves of Paliurus （Paliureae, Rhamnaceae） are reported from the Middle-Upper Miocene Shengxian Formation of Tiantai, Zhejiang, eastern china. The fruits can be identified as Paliurus microcarpa Xiang-Chuan lisp. nov., the diagnostic characters of external morphology and anatomy of which differ from those of both extant and fossil generic members; the leaves can be designated as Paliurus sp. The species based on winged fruits, P. microcarpa, might represent an ancient intermediate link exclusively known across the P. ramosissimus and P. spina-christi groups, showing a closer affinity to the P. ramosissimus group based on the resemblant smaller fruits with a narrower wing, and to the P. spina-christi group based on the similar wing structure and texture, respectively. Morphological analyses of the present and previous fossil fruit records around the world indicate that diversification of Paliurus had begun in northern transpacific regions by the Late Eocene. The macrofossil records, i.e., fruits and leaves of Paliurus globally when projected on paleoenvironmental maps in view of changing continental positions through time （from Eocene to Miocene） display that the past distribution of the genus was much wider than the present and belongs to a tropical and warm temperate realm of the Northern Hemisphere. Therefore, the modern restricted disjunction in tropical and warm temperate regions of East Asia and South Europe （even eastwards West Asia） might represent glacial refugia for some of the generic ancient lineages to survive severe cold at least since the terminal Pliocene.

关键词： paleobotany systematics Paliurus microcarpa winged fruit phytogeography Middle-LateMiocene Zhejiang Province

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

冲绳海槽中段末次冰消期以来的元素地层

引用

海洋学报 2003年第4期25卷 50-58页

作者：刘焱光孟宪伟李铁刚吴世迎王湘芹辛春英任红国家海洋局第一海洋研究所中国科学院海洋研究所山东青岛266071

在对冲绳海槽中段180号岩心进行高分辨率取样的基础上,测定了沉积物中的2.个地球化学指标,通过对各元素与Al_2._3含量的比值在岩心中的垂向变化规律的分析,结合氧同位素、黏土矿物、粒度、AMS^(14)C测年和R型因子分析方法,可将岩心从上... 详细信息

在对冲绳海槽中段180号岩心进行高分辨率取样的基础上,测定了沉积物中的2.个地球化学指标,通过对各元素与Al_2._3含量的比值在岩心中的垂向变化规律的分析,结合氧同位素、黏土矿物、粒度、AMS^(14)C测年和R型因子分析方法,可将岩心从上至下划分为5层:第1,3,5层具有相似的元素组合特征,第2.4层为明显的异常变化层位,将元素的地球化学行为、元素组合与物质来源联系起来,并与碎屑矿物、古生物资料对比,探讨岩心中元素组合垂向变化的制约因素,据此讨论了冲绳海槽中段末次冰消期以来陆源、火山源及生物源物质的分布规律。结果表明,冲绳海槽中段末次冰消期以来的沉积物来源以陆源物质为主,但在局部层位可因生源组分和火山源组分的强烈影响而发生实质性的变化。

关键词：冲绳海槽元素地层学海洋沉积学末次冰消期海洋地球化学

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

First Asian fossil record of Platydictya (Amblystegiaceae) from the lower Miocene and its paleoenvironmental significance

引用

Frontiers of Earth Science 2023年第1期17卷 351-360页

作者： liyan GUO liang XIAO Ya li Xiangchuan li qin leng Nan SUN Junfeng GUO Chaofeng FU Jianan wang Deshuang JI College of Earth sciences and Resources&key {2. of Western Mineral Resources and Geological Engineering(the Ministry of Education) Chang᾽an UniversityXi᾽an 710054China state key {2. of Palaeobiology and stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China laboratory for Terrestrial Environments Bryant UniversitySmithfieldRI 02917USA Shaanxi key laboratory of Early {2.fe and Environments&state key Laboratoty of Continental Dynamics Northwest UniversityXi᾽an 710069China

Mosses form a diverse land plant group in modern vegetation but have rarely showed up in the fossil record compared with vascular plants. Here, we report an extraordinarily-preserved early Miocene moss fossil from the lower Laoliangdi Formation in the Pingzhuang Coal Mine in Chifeng, Inner Mongolia Autonomous Region, northern {2.. Although lacking rhizoids and most reproductive organs, the well-preserved fossil allows us to assign it to Platydictya cf. jungermannioides (Amblystegiaceae) based upon its detailed gross and micro-morphology. The diagnostic characteristics include a small-sized body with slender stems bearing spirally arranged ovate-lanceolate leaves that lack costae. Leaf margins are mostly partly entire and partly dentate, a few dentate, and rarely completely entire. It represents the first fossil record of Platydictya in Asia. The specific living microenvironment of the extant P. jungermannioides enriched our understanding of the early Miocene environment that was previously based upon vascular plant fossils and sedimentary lithofacies in the area. Our early Miocene Platydictya cf. jungermannioides fossil lived in a warm and humid lush forest with a dense understory that received adequate water supplies.

关键词： moss the Pingzhuang Coal Mine Inner Mongolia Platydictya paleoenvironment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The Jurassic fossil wood diversity from western liaoning,NE china

引用

Journal of Palaeogeography 2019年第1期8卷 78-88页

作者： Zi-Kun Jiang Yong-Dong wang Ning Tian Ao-Wei Xie Wu Zhang li-{2. li Min Huang chinese academy of Geological {2. state key {2. of Palaeobiology and stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Center for Excellence in life and Palaeoenvironment Chinese Academy of Sciences College of palaeontology Shenyang Normal University key laboratory for Evolution of Past {2.fe in Northeast Asia Ministry of Land and Resources University of chinese academy of sciences Shenyang institute of geology and Mineral Resources

Western liaoning is a unique region in china that bears diverse types of Jurassic plants, including leaves, fern rhizomes,and wood, providing significant proxy for vegetation and palaeoenvironment reconstruction of the well-known Yanliao Flora in East Asia. In particular, the silicified wood is very abundant in the fossil Lagerst?tte of the Jurassic Tiaojishan Formation in Beipiao, western liaoning. Previous and recent systematic investigations documented a high diversity of the Jurassic wood assemblages. These assemblages are dominated by conifers, followed by cycads and *** total, about 30 species belonging to 2. genera of fossil wood have been recorded so far, which are represented by Cycadopsida, Ginkgopsida, Coniferopsida, and Gymnospermae incertae sedis. The evolutionary implications of several distinctive fossil wood taxa as well as palaeoclimate implications are summarized based on their anatomical structures and growth ring patterns. This work approaches the vegetation development and evolutionary significances of the wood taxa and their relatives, and provides clues for the further understanding of the diversity of the Jurassic Yanliao Flora in East Asia.

关键词： Fossil wood Diversity Evolution Tiaojishan Formation Jurassic

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Field Excursion Introduction for IGCP 679 1<sup>st</sup>International Symposium: Progress in Cretaceous geology in Shandong Province, china

引用

Open Journal of geology 2019年第10期9卷 722-725页

作者： Kemin Xu Gang li Zhenguo Ning Youping wang Jie {2. Fuzhong Zhang Xiuzhang li Xueqiang Zhu institute of geology Shandong Institute of Geological Survey Jinan China state key {2. of Palaeobiology and stratigraphy Center for Excellence in Life and Palaeoenvironment Nanjing Institute of Geology and Palaeontology Nanjing China

The non-marine Cretaceous sequences are well developed in the relict basins, i.e. the Luxi basin in the west, and the Jiaolai basin in the east of Shandong Province. The Lower Cretaceous Santai Formation (140 - 136 Ma) in the Luxi basin contains aeolian dune deposits, which were formed under the control by westerly. The Cretaceous strata of the Jiaolai basin are divided into three groups: i.e. in ascending order, the Laiyang, {2.gshan and wangshi groups. New SHRIMP zircon U-Pb radiometric dating data demonstrated six Cretaceous volcanism episodes. The lower part of the wangshi Group should be assigned to the upper Lower Cretaceous. An Ir anomaly recovered in the lower Jiaozhou Formation suggests that the Cretaceous/Palaeogene boundary would be in the interval between 537.3 - 537.4 m in the borehole JK1. At last the detailed information about the pre-symposium field excursion was introduced.

关键词： Cretaceous lithostratigrphy Chronostratigraphy Shandong Province china

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

浙东中新世菱属果实化石的数量分类

引用

地学前缘 2020年第4期27卷 110-123页

作者：肖良王兴李雪梅李相传贾慧孙楠梁嘉琪王钦李江啸雍媛媛长安大学地球科学与资源学院陕西西安710054 中国石油长庆油田分公司勘探开发研究院陕西西安710018 西安石油大学地球科学与工程学院陕西西安710065 中国科学院南京地质古生物研究所现代古生物学和地层学国家重点实验室江苏南京210008 西北大学陕西省早期生命与环境重点实验室陕西西安710069

在浙东天台晚中新世嵊县组发现大量菱属果实化石。该化石保存完好,特征丰富。由于其种类多、性状冗杂不明显,菱属植物的鉴定与分类一直存在很大争议。本研究基于菱属果实化石性状特征多、便于测量记录的特点,通过聚类分析和主成分分析... 详细信息

在浙东天台晚中新世嵊县组发现大量菱属果实化石。该化石保存完好,特征丰富。由于其种类多、性状冗杂不明显,菱属植物的鉴定与分类一直存在很大争议。本研究基于菱属果实化石性状特征多、便于测量记录的特点,通过聚类分析和主成分分析等数值统计方法对菱属果实进行鉴别、归类,寻找鉴定分类中的指导性性状。首先,利用上述方法对现生菱属果实进行数量分析,取得了较好结果。然后,采用同样方法对菱属果实化石进行研究,认为聚类分析和主成分分析法能够对化石种进行有效的鉴定分类,可以成功剔除冗余性状。最后,研究得出果体形状、是否有果冠、果冠是否外翻、顶部形态、肩角生长方向、腰角生长方向、腰角长度、瘤状退化腰角数目等特征是菱属果实化石鉴定的关键性状。基于以上性状,嵊县组菱属果实化石可以分为两个类群。

关键词：中新世嵊县组菱属植物果实化石聚类分析主成分分析

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

鄂西秭归盆地下侏罗统香溪组泥岩地球化学特征及其古环境意义

引用

地层学杂志 2021年第1期45卷 58-68页

作者：代军王永栋周宁李丽琴南京大学地球科学与工程学院江苏南京210023 南京大学生物演化与环境科教融合中心江苏南京210023 中国科学院南京地质古生物研究所和生物演化与环境卓越创新中心现代古生物学和地层学国家重点实验室江苏南京210008 西北大学地质系陕西西安710069

泥岩中主量元素、微量元素的变化与沉积环境和古气候的变化息息相关。本文利用XRF和ICP-MS等技术手段分析了鄂西秭归地区头道河剖面下侏罗统香溪组泥岩中的主量元素和微量元素,揭示香溪组沉积时期的沉积环境和古气候特征。头道河剖面香... 详细信息

泥岩中主量元素、微量元素的变化与沉积环境和古气候的变化息息相关。本文利用XRF和ICP-MS等技术手段分析了鄂西秭归地区头道河剖面下侏罗统香溪组泥岩中的主量元素和微量元素,揭示香溪组沉积时期的沉积环境和古气候特征。头道河剖面香溪组上段第1—12.Sr含量均值为113.8×10^(-6),第13层均值骤增为2.38.3×10^(-6),指示水体盐度大幅上升, Ba含量及Sr/Ba比值变化指示了相同的结果。这可能是由于香溪组沉积晚期气候变得炎热干旱,水体蒸发量迅速增大导致。Ni/Co、Cu/Zn及Ceanom等指标指示香溪组沉积水体介质由早期的富氧条件转变为晚期的还原条件。Sr、Mg/Ca及CIA等指标反映了香溪组沉积晚期发生了气候升温干热化事件。这些元素分析结果揭示了香溪组上部炎热干旱的古气候特征,可能与早侏罗世托阿尔期(Toarcian)缺氧事件(T-OAE)有关。

关键词：早侏罗世香溪组秭归盆地地球化学古气候湖北

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：