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1.
真菌孢子烷烃生物标志物特征及其热演化试验的初步研究 总被引：1，自引：1，他引：1
以一种类似地层中无孔多胞孢的现代真菌链格孢属孢子为样品，研究真菌孢子的原生烃烷烃馏分生物标志物及其热解生烃特征。实验结果表明，真菌孢子样品原生烃类的烷烃馏分，主要由正烷烃、异构烷烃和链烯烃相成。正烷烃约占抽提物总量的０．１８％、ｎＣ１９，烷占正烷烃总量的２４．１％。 相似文献
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新疆准噶尔盆地东缘下石灰统滴水泉组孢粉组合 总被引：2，自引：1，他引：2
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Ｌｅｉｏｔｒｉｌｅｔｅｓ（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 相似文献
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本文应用气相色谱，色谱－质谱和线性同位素质谱分析技术对盆地金湖凹陷下第三系阜宁组阜二段低熟烃源岩和烃组分及单体烃稳定碳同位素组成进行了深入地研究，发现甾烷类－Ｃ２９在饱和烃中含量很高，正构烷烃呈三峰型分布，以ｎＣ２２或ｎＣ２０为主峰。最后根据烃源岩有机显微组分和单体烃碳同位素组成特征认为正构烷烃中低碳数和中等碳数正构烷烃可能主要来源于菌藻类，高碳数大部分可能主要由藻类贡献。 相似文献
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盘星藻烷烃生物标志物特征及其热演化试验的初步研究 总被引：6，自引：2，他引：6
本文以盘星藻作为典型样品，研究淡水水生单细胞藻类的烷烃生物标志特征及其热解生烃特征。实验结果表明，盘星藻生烃主要分成四大类：正烷烃、稀烃、无环类异戊二烯和二环萜类。ｎＣ１７在正烷烃组分中占５１．６％。检出一组Ｃ２０的二环萜类同分异构体，其含量相当于正浣烃含量的９７．１％。盘星藻热解生烃也以低碳数烃类为主，与高等植物来源的烃类相区别；甾烷Ｃ２９／（Ｃ２７＋Ｃ２８＋Ｃ２９）值为０．５左右，与海洋浮游生 相似文献
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贵州三都早奥陶世同高组下燕高页岩段的生物标志化合物 总被引：8，自引：1，他引：8
本文着重报道了贵州三都早奥陶世同高组下燕高页岩段生物标志化合物特征，首次在采自该层位的样品中检出丰富的正烷烃、链状类异戊二烯烷烃、萜类化合物及甾类化合物。测试结果显示:正烷烃图谱呈双驼峰形，碳数分布为ｎＣ１５～ｎＣ３５，以ｎＣ１８为主峰碳，ｎＣ２９为次主峰碳，Ｃ－２１/Ｃ＋２２为０.７７～１.０２，ＯＥＰ为０.９４～１.０４；植烷占优势，Ｐｒ/Ｐｈ为０.４０～０.４６；藿烷碳数为Ｃ２７～Ｃ３５，以Ｃ３０占优势，Ｃ２７＋Ｃ２９＜Ｃ＋３１；仅见碳数分布为Ｃ２０～Ｃ２９的长链三环二萜烷，以Ｃ２８为主峰碳；甾烷丰度顺序为Ｃ２９甾烷＞Ｃ２７甾烷＞Ｃ２８甾烷，同时检出了孕甾烷和４－甲基甾烷。生物标志化合物显示出还原环境特点，且可能主要来自藻类。 相似文献
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云南施甸晚志留世－早泥盆世孢子和疑源类（ACRITARCHS） 总被引：1，自引：0，他引：1
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 相似文献
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准噶尔盆地东北缘克拉美丽地区石炭、二叠纪地层的孢粉学研究，仅在早石炭世的塔木岗组、滴水泉组和晚二叠世的平地泉组中发现不很丰富的孢粉化石，可划分为与上述３个组相对应的３个孢粉组合，被依次称为Ｄｉｃｔｙｏｔｒｉｌｅｔｅｓ－Ｌｙｃｏｓｐｏｒａ组合、Ｃｒａｓｓｉｓｐｏｒａ－Ｐｕｎｃｔａｔｉｓｐｏｒｉｔｅｓ－Ｓｔｅｎｏｚｏｎｏｔｒｉｌｅｔｅｓ组合和ｐｉｔｙｏｓｐｏｒｉｔｅｓ－Ｔｏｒｉｓｐｏｒａ组合。经孢粉组合特征讨论及与国内外同期孢粉组合对比，这３个组合或３个组的地质时代可初步确定为早石炭世早期的杜内期、早石炭世晚期早维宪期和晚二叠世中期的中欧克期。 相似文献
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粤北地区下石炭统下部的古孢子化石组合以具有泥盆－石炭纪过渡色彩为特征。根据其产出的地层位置和组成特征，划分Ｖｅｒｒｕｃｏｓｓｉｓｐｏｒｔｉｔｅｓ ｎｉｔｉｄｕｓ－Ａｎａｐｉｃｕｌａｔｉｓｐｏｒｉｔｅ ｈｙｓｔｒｉｃｏｕｓｕｓ组合带（ＮＨ组合带（和Ｌｙｃｏｓｐｏｒａ－Ｃａｌａｍｏｓｐｏｒａ组合带（组合带）。前者以乐昌大赛坝剖面为单位层型，其中的孢子较原理，交复杂，繁盛于泥盆纪的分子含也较高，总体特征 相似文献
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河南固始花园墙组时代的新认识 总被引：10，自引：0，他引：10
北淮阳区原来一直划归于下石炭统最下部的花园墙组其实际时代属于晚泥盆世－早石炭世早期。古孢子分析显示，其下段具有以Ｃｙｃｌｏｇｒａｎｉｔｒｉｌｅｔｅｓ－Ａｎｅｕｒｏｓｐｏｒａ－Ｒｅｔｉｓｐｏｒａ为代表的组合特征，与江苏宝应、南京茨山、安徽巢湖等地的晚泥盆世五通组孢子组合面貌类似；上段具有早石炭世杜内期色彩。为大别山北麓地层层序的建立提供了确切的生物地层资料。 相似文献
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Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco. 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
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The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引：4，自引：0，他引：4
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species. 相似文献
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Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozac&#x;h Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003). 相似文献
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正20141520 Bo Ying(Key Laboratory of Metallogeny and Mineral Assessment,MLR,Beijing 100037,China);Liu Chenglin Saline Spring Hydrochemical Characteristics and Indicators for Potassium Exploration in Southwestern and Northern Tarim Basin,Xinjiang(Acta Geoscientica Sinica,ISSN1006-3021,CN11-3474/P,34(5),2013,p.594-602,5 illus.,3 tables,28 refs.) 相似文献
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正20141243Chen Ge(Hangzhou Research Institute of Petroleum Geology,PetroChina,Hangzhou 310023,China);Si Chunsong Study on Sedimentary Numerical Simulation Method of Fan Delta Sand Body(Journal of Geology, 相似文献
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正20142599Chen Sanming(Guangxi Key Laboratory of Concealed Deposits Exploration,Guilin University of Technology,Guilin541004,China);He Yuzhou Block Model and Reserves Estimation of Panzhihua Iron Deposit Based on 3D Geological Modeling(Journal of Guilin University of Technology,ISSN1674-9057,CN45-1375/N,33(4),2013,p.610-615,9illus.,1table,15refs.) 相似文献
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正20140594 Bai Daoyuan(Hunan Institute of Geology Survey,Changsha 410016,China);Zhong Xiang Faults in the Jingzhou Basin and Their Tectonic Settings(Geotectonica et Metallogenia,ISSN1001-1552,CN44-1595/P,37(2),2013,p.173-183,6illus.,59refs.)Key words:basin evolution,tectonic setting,South China In the Upper Paleozoic and Jurassic se- 相似文献
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正20141912Cao Hui(State Key Laboratory for Continental Tectonics and Dynamics,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China)Gravitational Collapse and Folding during Orogenesis:A Comparative Study of FIA Trends and Fold Axial Plane Traces(Geology in China,ISSN1000-3657,CN11-1167/P,40(6),2013,p.1818-1828,9illus.,35refs.,with 相似文献