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Response to paleoatmospheric CO_2 concentration of Solenites vimineus(Phillips)Harris(Ginkgophyta)from the Middle Jurassic of the Yaojie Basin,Gansu Province,China

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Science China Earth Sciences 2009年第12期52卷 2029-2039页

作者： yan defei SUN BaiNian XIE SanPing LI XiangChuan WEN WenWen Key Laboratory of Western China’s Environmental Systems of the Ministry of Education Lanzhou UniversityLanzhou 730000China LPS Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China

Solenites vimineus (Phillips) Harris (Ginkgophyta) specimens with well-preserved cuticles were collected from five different beds in the oil shale member of the Middle Jurassic Yaojie Formation in the Yaojie Basin, Gansu Province, northwestern China. Gross morphology and fine structures of the fossil leaves were studied, and stomatal parameters were analyzed, according to which, the paleoatmospheric CO2 concentration can be deduced as 1512-1896 ppm that would have caused an increase in mean temperature of about 6.5-7.4℃. Carbon isotopes from the fossils indicate that the carbon isotopic discrimination and water use efficiency (WUE) of S. vimineus were raised nearly obtaining the ideal physiologic state in increased CO2 concentrations and temperature conditions, suggesting that S. vimineus records the paleoenvironmental information of the Middle Jurassic Yaojie Basin and can be used for environmental reconstruction.

关键词： Solenites vimineus stomatal parameters paleo-CO_(2)concentration carbon isotopes Middle Jurassic northwestern China

An exceptionally well-preserved herbaceous eudicot from the Early Cretaceous(late Aptian–early Albian)of Northwest China

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National Science Review 2021年第12期8卷 46-54页

作者： Baoxia Du Mingzhen Zhang Bainian Sun Aijing Li Jing Zhang defei yan Sanping Xie Jingyu Wu Key Laboratory of Mineral Resources in Western China (Gansu Province) Lanzhou University Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Key Laboratory of Petroleum and Resources Gansu Province

A fossil eudicot, Gansufructus saligna gen. et sp. nov., is reported from the Early Cretaceous(late Aptian–early Albian) of the Gansu Province, Northwest China, based on numerous well-preserved axes with attached leaves and infructescences. The leaves are alternate, short petiolate and linear-lanceolate with low rank pinnate to reticulate venation. The infructescences are loose panicles bearing fruits in different stages of maturity, each containing four partly free carpels borne in a whorled arrangement. Each carpel has three to five seeds borne along its ventral margin. The nature of the leaves and axes indicates a terrestrial,herbaceous habit. In general organization, Gansufructus is closely similar to the fruit-bearing axes of Sinocarpus decussatus from the Early Cretaceous Jehol Biota, as well as other more or less contemporaneous angiosperms from the Far East, which together provide evidence of diverse eudicot angiosperms of low stature colonizing areas close to environments of deposition.

关键词： eudicot Early Cretaceous Northwest China Jehol Biota Gansufructus paleoecology

Fossil Liverworts from the Lower Cretaceous Huolinhe Formation in Inner Mongolia, China

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Acta Geologica Sinica(English Edition) 2016年第3期90卷 838-846页

作者： LI Ruiyun WANG Xuelian JIN Peihong MA Fujun yan defei LIN Zhicheng SUN Bainian School of Earth Sciences&Key Laboratory of Mineral Resources in Western China(Gansu Province) Lanzhou University Northwest University Museum Northwest University Key Laboratory of Economic Stratigraphy and Palaeogeography Nanjing Institute of Geology and PalaeontologyCAS School of Petroleum Engineering Chongqing University of Science & Technology

A new genus and species, Rebouliothallus huolinhensis sp. nov., and two uncertain species, Ricciopsis sp. and Hepaticites sp., are described. The fossils were collected from the Lower Cretaceous Huolinhe Formation of Huolinhe Basin, northeastern China. The new genus Rebouliothallus was established in the Aytoniaceae family of Marchantiales. Rebouliothallus huolinhensis appears to be quite similar to species of the extant genus Reboulia Raddi. The species is characterized by the relatively large ventral scales. Ventral scales are large, imbricate and arranged in two rows on the ventral surface. Rhizoids are either pegged or smooth. Ricciopsis sp. is characterized by the rosette- forming thallus. Hepaticites sp. shows some similarities to liverworts. Of the forty-nine Early Cretaceous floras of China, only two floras, one from the Huolinhe basin, Inner Mongolia and the other from the Jixi Basin, Heilongjiang Province, contain fossil liverworts. The rare fossil liverwort records in the Early Cretaceous floras of China may be the result of taphonomic bias.

关键词： Rebouliothallus Ricciopsis Hepaticites Early Cretaceous Huolinhe Formation

Buxus Leaves from the Oligocene of Guangxi, China and Their Biogeographical Significance

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Acta Geologica Sinica(English Edition) 2015年第5期89卷 1453-1469页

作者： MA Fujun WANG Qiujun DONG Junling yanG Yi WANG Wenjia yan defei SUN Bainian School of Earth Sciences & Key Laboratory of Mineral Resources in Western China (Gansu Province) Lanzhou University Key Laboratory of Petroleum Resources Gansu Province CAS School of Geography and Tourism Guizhou Normal College Key Laboratory of Economic Stratigraphy and Palaeogeography Nanjing Institute of Geology and Palaeontology CAS

The present paper reports two new species of Buxus from the Oligocene Ningming Formation of Guangxi, South China, on the basis of several compressed fossil *** ningmingensis *** characterized by an elliptic to ovate shape; pinnate venation with marginal secondary, long hairs on the adaxial side of the midvein base; and amphistomatic, anomocytic stomata with a prominent outer *** of these characteristics suggest a closest affinity to the living Buxus microphylla *** new species identified as Buxus preaustro-yunnanensis *** characterized by the diagnostic formation of its admedially branched tertiaries, the trunks of which are often strongly thickened by *** species is most similar to the extant Buxus *** co-occurrence of Buxus ningmingensis *** Buxus preaustro-yunnanensis *** that these two Buxus lived during the Oligocene under a warm, tropical to subtropical climate, similar to the current climate of *** findings provide the earliest fossil evidence of Buxus leaves with detailed illustrations of leaf architectural and cuticular *** occurrence of these two species indicates that Buxus began to diversify in Guangxi no later than the Oligocene.

关键词： Buxus diversification paleoclimate Oligocene Guangxi

FOSSIL EVIDENCE OF FAMILY MYRTACEAE FROM THE PLIOCENE IN WEST YUNNAN, CHINA

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FOSSIL EVIDENCE OF FAMILY MYRTACEAE FROM THE PLIOCENE IN WES...

甘肃侏罗纪植物化石Ginkgo huttonii角质层地球化学特征

第二届国际古生物学大会

作者： Sanping XIE, Bainian SUN, defei yan Key Laboratory of Western China’s Environmental Systems (Ministry of Education), Lanzhou University, Lanzhou 730000, China.

The reproductive organ or vegetative organ at- tached to a reproductive organ in the fossil record can offer the most reliable evidence for its natural taxon, however, there are many situations where only isolated fol... 详细信息

关键词： Acmena Pliocene west Yunnan epidermis

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地质学报 2005年第3期79卷 289-294页

作者：石亚军孙柏年张成君阎德飞兰州大学资源环境学院西部环境教育部重点实验室 730000

对甘肃民和盆地侏罗纪植物化石Ginkgohuttonii(Sternb.)Heer的角质层与现生银杏Ginkgobiloba的角质层进行了地球化学特征对比分析,结果表明植物化石角质层有机物特征符合石油形成中沥青的演化特点。通过有机物组分含量分析,它们相当于... 详细信息

对甘肃民和盆地侏罗纪植物化石Ginkgohuttonii(Sternb.)Heer的角质层与现生银杏Ginkgobiloba的角质层进行了地球化学特征对比分析,结果表明植物化石角质层有机物特征符合石油形成中沥青的演化特点。通过有机物组分含量分析,它们相当于中国中、新生代油源岩有机质类型中的腐泥型—腐殖腐泥型。对烃组分三角图进行投点,落入II型干酪根范围内。通过有机质中的一些指标分析,发现Ginkgohuttonii的角质层处于低成熟阶段,与煤中显微组分角质体的成烃模式基本一致。另外,角质层的可溶有机质分布特征表明,植物化石角质层对陆相高蜡原油的形成有一定的作用,证明高等植物对蜡质有贡献。当前研究及古植物学资料表明,银杏是一种有利于煤成油的植物。

关键词：地球化学特征植物化石角质层侏罗纪甘肃有机质类型可溶有机质民和盆地对比分析演化特点石油形成含量分析指标分析成熟阶段成烃模式显微组分高蜡原油高等植物古植物学有机物油源岩新生代三角图烃组分

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秦岭西成矿集区构造演化与铅锌成矿关系

地质学报 2012年第8期86卷 1291-1297页

作者：朱多录孙柏年闫德飞董重侯蜀光高宏光兰州大学地质科学与矿产资源学院兰州730000 云南省地质调查院昆明650051

通过对西成矿化集中区地质资料的综合分析,将矿集区铅锌成矿作用划分为加里东准备期、海西早期成矿期、海西晚期富集期和印支期改造叠加;不同阶段形成的矿床类型不同,矿床的形成、分布与构造具有一定的密切关系。晚古生代早期(D)的拉张... 详细信息

通过对西成矿化集中区地质资料的综合分析,将矿集区铅锌成矿作用划分为加里东准备期、海西早期成矿期、海西晚期富集期和印支期改造叠加;不同阶段形成的矿床类型不同,矿床的形成、分布与构造具有一定的密切关系。晚古生代早期(D)的拉张断陷作用和中生代(T3)陆内造山作用对矿集区金属成矿产生了关键性的作用,前一事件形成了热水沉积盆地,进行了海底热水喷流沉积成矿作用;后一事件则在本区产生强烈广泛的构造-岩浆活动,是本区的改造和再造铅锌矿床阶段。

关键词：构造演化成矿关系西成矿集区

Palaeogene fossil Populus leaves from Lanzhou Basin and their palaeoclimatic significance

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Chinese Science Bulletin 2004年第14期49卷 1494-1501页

作者： SUN Bainian1,2, yan defei1, XIE Sanping1, CONG Peiyun1, XIN Cunlin1 & YUN Fei1 1. Key Laboratory of Western China抯 Environmental Systems of the Ministry of Education, Lanzhou University, Lanzhou 730000, China 2. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sci-ences, Nanjing 210008, China Key Laboratory of Western China’s Environmental Systems of the Ministry of Education Lanzhou University Lanzhou China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing China

An angiosperm compression flora is found in Palaeogene from Lanzhou Basin and the cuticular analysis of Populus davidiana Dode in the flora is carefully made. Fur-thermore, the fossil cuticles are compared with the epidermal structures of extant Populus leaves growing in different en-vironments, i.e. moist, semimoist, and semiarid to arid cli-matic regions. The present experiments indicate that mature leaves of P. davidiana show leaf size from big to small, leaf cuticles from thick to thin and anticlinal walls of epidermal cells from faintness to clarity along with the increase of lati-tudes of the plant distributions, the climatic variation from moist to arid, the annual precipitation from more to less and the annual mean temperature from high to low. The fossil P. davidiana differs from the specimens collected from Shandan in semiarid to arid climatic regions but closely resembles the Wushan leaves in a semi-moist climatic area in a lot of fea-tures. In a word, the new research may reflect that the flora lives in a semi-moist climatic environment. The present dis-covery of compression of Paleogene Populus davidiana is of great significance to studying vegetation types, climatic and environmental changes during the primal uplifting of the Qinghai-Tibet Plateau.

关键词：古气候兰州盆地山杨化石角质层早第三纪被子植物

甘肃宝积山盆地中侏罗世阿干镇似银杏(Ginkgoites aganzhenensis yang)的古环境意义

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沉积学报 2017年第1期35卷 57-66页

作者：陈应权马利涛彭琳刘军张立范俊杰闫德飞兰州大学地质科学与矿产资源学院兰州730000 甘肃省西部矿产资源重点实验室兰州730000 武警黄金地质研究所河北廊坊065000

在甘肃宝积山盆地中侏罗统窑街组发现了保存较为完整的银杏类叶片化石。对当前化石宏观特征与镜下微观构造进行研究,并将其鉴定为阿干镇似银杏(Ginkgoites aganzhenensis)。在此基础上,统计了该种下表皮的气孔参数,并利用气孔指数法和... 详细信息

在甘肃宝积山盆地中侏罗统窑街组发现了保存较为完整的银杏类叶片化石。对当前化石宏观特征与镜下微观构造进行研究,并将其鉴定为阿干镇似银杏(Ginkgoites aganzhenensis)。在此基础上,统计了该种下表皮的气孔参数,并利用气孔指数法和气孔比率法恢复研究区中侏罗世早期的古大气CO_2浓度,探讨这两种方法的准确性。分析结果表明,气孔指数法获得的古大气CO_2浓度为974×10^(-6),落在了GEOCARBⅢ的可信误差范围之外;气孔比率法重建的古大气CO_2浓度为1 823×10^(-6),处于GEO-CARBⅢ可信误差范围之内。这说明对于当前化石而言,利用气孔比率法恢复古大气CO_2浓度更加合适,数据十分接近GEO-CARBⅢ的最佳拟合线,表明似银杏也是恢复古大气CO_2浓度的一种理想植物。通过计算得出当时的温度比现在高7.2℃,反映了宝积山盆地中侏罗世阿林期到巴柔期为温暖潮湿的温带气候环境。

关键词：干镇似银杏宝积山盆地中侏罗统古环境