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Boundary of Cretaceous and Paleogene continental deposits in zeya-bureya basin,Amur(Heilongjiang)River region

Global Geology 2011年第3期14卷 144-159页

作者： Valentina S. Markevich Eugenia V. Bugdaeva Abdul R. Ashraf SUN Get Institute of Biology and Soil Science FEB RAS Vladivostok 690022 Russia Institute of Geosciences University of Tuebingen Tuebingen 72074 Germany Key-Lab for Evolution of Past Life MOEC （Jilin University） Changchun 130026 China College of Paleontology Shenyang Normal University Shenyang 110034 China

It was conducted the comparison of palynological assemblages of the Middle Tsagayan,Upper Tsagayan subformations,Furao and Wuyun formations from zeya-bureya basin of Amur (Heilongjiang) River region with assemblages obtained from the marine deposits of Northeast Russia,Sakhalin,Kuril,and Hokkaido Islands,dated by ammonites,foraminifers and other invertebrates. Based on detail correlation,the geological age of the terrestrial beds was defined. The guide fossils are recognized Marsypiletes cretacea,Tricolpites variexi- nus,Aquilapollenites conatus,A. stelkii,A. rombicus,Integricorpus bellum,Pseudointegricorpus clarireticula- tus,Triprojectus amoenus,Orbiculapollis lucidus,Wodehouseia aspera,Quercoidites minor,which had last oc- currence in the late Maastrichtian. The Danian palynofloras usually are dominated by Triatriopollenites plicoides and T. confusus. The species Anacolosidites subtrudens,Aquilapollenites proceros,A. spinulosus have last occurrence in the Danian. The K-T (K-Pg) boundary in the terrestrial deposits is defined in the base of the Upper Tsagayan Subformation and the base of the lower part of the Wuyun Formation. The latter is represented by aleuropelite to fine-grained sandstones. The change of taxonomical composition of palynospectra in similar environments could be determined by real change of flora at the Mesozoic and Cenozoic boundary,but not by changes of lithological facies or depositional environment,generally.

关键词： palynoflore Cretaceous Paleogene boundary zeya-bureya basin

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Palynoflora of Wulaga dinosaur site in Jiayin(zeya-bureya basin, China)

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Global Geology 2009年第3期12卷 117-121页

作者： V.S. Markevich E.V. Bugdaeva SUN Ge Institute of Biology and Soil Science FEBRAS Vladivostok 690022 Russia Research Center of Paleontology ＆ Stratigraphy Jilin University Changchun 130026 China Key-Lab for Evolution of Past Life Environment Ministry of Education China Changchun 130026 China

The palynological assemblage from Wulaga dinosaur site in Jiayin from southeastern zeya-bureya basin was studied. The high content of pteridophytes spores is characteristic for this assemblage. The further characters are in decrease of abundance-tricolpate pollen, Ginkgocycadophytus, pollen of Taxodiaceae, Cupressaceae and Taxaceae (TCT), bisaccate pollen of Pinaceae, and triporate pollen. The bone-bearing burials of Wulaga dinosaur site formed under conditions of vast swampy river valley covered by ferns and taxodialeans. Tricolpate pollen, produced by plants, close to those of Platanaceae, Fagaceae, Betulaceae, and Juglandaceae, counts in favor of valley river open canopy forests.

关键词： palynoflora Late Cretaceous Yuliangzi Formation dinosaurs Wulaga zeya-bureya basin

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Fossil woods from the Upper Cretaceous to Paleocene of Heilongjang(Amur)River area of China and Russia

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Global Geology 2011年第3期14卷 192-203,I0001-I0005页

作者： Kazuo Terada Harufumi Nishida SUN Ge Fukui Prefectural Dinosaur Museum Katsuyama Fukui 911-8601 Japan Faculty of Science and Engineering Chuo University Tokyo 112-8551 Japan Key-Lab for Evolution of Past Life ＆ Environment in NE Asia MOEC （ Jilin University） Changchun 130026 China College of Paleontology Shenyang Normal University Shenyang 110034 China

Fossil woods were collected from the Upper Cretaceous to Paleocene beds distributed around Heilong- jang （Amur） River area of China and Russia. A total of 43 specimens were collected from Baishantou, Long- gushan, and Yong＇ancun in Jiayin, China, and 85 specimens from zeya-bureya basin lying southeast of Blagoveshchensk in Russia. Selected specimens were sectioned and studied anatomically. The source deposits of almost all identifiable specimens belong to the Upper Cretaceous （Campanian） Taipinglinchang Formation and the Paleocene Wuyun Formation in China, and the Paleocene Upper Tsagayan Formation in Russia. Al- though the results obtained are still far from complete, the taxonomic composition of the fossil woods show marked stratigraphic differences between the two horizons beyond the K/T boundary in China. There is also a strong similarity in wood flora between the Wuyun Formation of China and the Upper Tsagayan Formation of Russia. All identified specimens from the Taipinglinchang Formation are Xenoxylon latiporosum, This is one of the stratigraphically younger records of Xenoxylon, which is a conifer morphogenus of uncertain affinity most common in the Triassic to Early Cretaceous. Only one specimen with possible derivation from either the Wuyun or the Maastriehtian Furao Formation in China was identified as Taxodioxylon sp. The Wuyun Formation yielded both conifers and dicotyledonous woods. The conifers include Taxodioxylon sequoianum of the Taxodiaceae, and Protopiceoxylon amurense, which is attributable to the extant genera Keteleeria or Nothotsuga of the Pinaeeac, both are at present endemic to China. At least two morphotypes of dicotyledonous woods were recognized, with one identified as el. Hamamelidoxylon , and the other diffuse porous wood is characterized by numerous heterogeneous rays. From the zeya-Buleya basin of Russia, Taxodioxylon sequoianum and cf. Hamamelidoxylon sp. were identified from the Upper Tsagayan Formation. The similarity of wood comp

关键词： K/T boundary fossil wood Heilongjang Amur zeya-bureya basin

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Sedimentary facies of Maastrichtian to Danian deposits in Amur River area,Russian Far East

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Journal of Geoscientific Research in Northeast Asia 2004年第2期7卷 149-155页

作者： Shigeyuki Suzuki Abdul R. Ashraf Hakuyu Okada3 Department of Earth Sciences Faculty of Science Okayama University Okayama 700-8530 JapanInstitute of Geosciences University of Tuebingen Tuebingen D-72076 Germany4-8-36-601 Yoshizuka Hakata-ku Fukuoka 812-0041 Japan

Sedimentary facies of the Tsagayan Formation is distributed in the eastern zeya-bureya basin has been analyzed. The formation is of the Maastrichtian to Danian in age and characterized by the cyclicity of the fining-upwards successions. Analysis of environmental changes during the K/T boundary is the focus of this study. Five facies have been identified: Facies A, thick and laterally extensive coarse-grained to medium-grained sandstone units, interpreted as channelfill deposits; Facies B, parallel-laminated to massive mudstone units interpreted as interchannel lakes and flood plain deposits; Facies C, sheet-like medium-grained to fine-grained sandstones interpreted as crevasse splay deposits; Facies D, coal to coaly mudstone beds interpreted as deposits of peatlands; Facies E, very poorly sorted sandy mudstone beds interpreted as debris flow deposits. Fluvial environments with the low-relief flat topography was inferred. A channel transported large volumes of clasts, and a flood basin with interchannel lakes and peatlands was deciphered. Any distinct change of sedimentary environments has not been identified throughout the Tsagayan Formation (including the K/T boundary). However, two beds of debris flow deposits were identified. The one occurs at the uppermost part of the lower Tsagayan Subformation and contains dinosaur fossils. The other is intercalated in the upper Tsagayan Subformation.

关键词： fluvial deposits Tsagayan Formation zeya-bureya basin K/T boundary Amur River area

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