Cenozoic terrestrial palynological assemblages in the glacial erratics from the Grove Mountains, east Antarctica | |
Fang, Aimin1; Liu, Xiaohan2; Wang, Weiming3; Huang, Feixin2; Yu, Lianjun1 | |
刊名 | PROGRESS IN NATURAL SCIENCE |
2009-07-10 | |
卷号 | 19期号:7页码:851-859 |
关键词 | East Antarctica Grove Mountains Glacial erratics Spores and pollen Neogene |
ISSN号 | 1002-0071 |
DOI | 10.1016/j.pnsc.2008.01.040 |
文献子类 | Article |
英文摘要 | Fossiliferous glacial erratics have been found in moraines of the Grove Mountains, east Antarctica since 1998 by Chinese National Antarctic Research Expedition (CHNARE) teams. These erratics were derived from a suite of glaciogene strata hidden beneath the Antarctic Ice Sheet in the Lambert glacier drainage system, and thus provide a record of Cenozoic paleoenvironmental conditions and fossil biotas that are so far unknown from outcrops and drill cores in this region. By microfossil analysis, sparse Neogene spores and pollen grains are revealed, including: Toroisporis (Lygodiaceae), Granulatisporites (Pteridaceae?), Osmunda (Osmundaceae), Polypodiaceae, Magnastriatites (Parkeriaceae), Deltoidospora, Araucariaceae, Taxodiaceae, Podocarpus (Podocarpaceae), Dacrydium (Podocarpaceae), Pinus (Pinaceae), Keteleeria (Pinaceae), Picea (Pinaceae), Tsuga (Pinaceae), Chenopodiaceae, Artemisia (Asteraceae), Asteraceae, Gramineae, Fraxinoipollenites (Oleaceae), Oleoidearumpollenites (Oleaceae), Oleaceae, Operculumpollis, Nothofagidites (Nothofagus), Rhus, Quercus (Fagaceae), Juglans (Juglandaceae), Pterocarya (Juglandaceae), Liquidambar (Hamamelidaceae), Ulmus (Ulmaceae), Ulmoidepites (Ulmaceae), Tilia, Proteacidites (Proteaceae) and Tricolpopollenites; but without any marine diatoms. Most of the spores and pollen grains in the erratics are considered to originate from local sources except for some older exotic components that might be recycled from the basement sedimentary rocks by the ice sheet, so they are in situ sporo-palynological assemblages. Furthermore, since the source areas of the glaciogenic sedimentary rocks are assumed to be local or in the up glacier areas, the palynological assemblages in these erratics represent an inland terrestrial flora during a warmer period of the ice-sheet evolutionary history. The ages of these erratics are also discussed based on the occurrence of some diagnostic pollens such as the Artemisia, Chenopodiaceae and Nothofagus, which implies Neogene (most probably Pliocene). As a preliminary conclusion, we think that the existence of the Cenozoic glaciogenic rocks and their palynological assemblages present new evidence for a large scale glacial retreat event in the Grove Mountains of east Antarctica, and thus support a dynamic East Antarctic Ice Sheet (EAIS). Furthermore, the absence of marine fossils in the samples analyzed not only provides additional evidence for a terrestrial sedimentary environment of these erratics, but also indicates that there is no transportation of Cenozoic marine fossils from the adjacent areas of the Grove Mountains. (C) 2009 National Natural Science Foundation of China and Chinese Academy of Sciences. Published by Elsevier Limited and Science in China Press. All rights reserved. |
WOS关键词 | PLIOCENE SORSDAL FORMATION ; PRINCE-CHARLES MOUNTAINS ; TRANSANTARCTIC MOUNTAINS ; SIRIUS GROUP ; LAMBERT GRABEN ; VESTFOLD HILLS ; ICE-SHEET ; STRATIGRAPHY ; MARINE ; REGION |
WOS研究方向 | Materials Science ; Science & Technology - Other Topics |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE INC |
WOS记录号 | WOS:000266345100009 |
资助机构 | National Natural Science Foundation of China(40631004 ; National Natural Science Foundation of China(40631004 ; National Natural Science Foundation of China(40631004 ; National Natural Science Foundation of China(40631004 ; 40202034) ; 40202034) ; 40202034) ; 40202034) ; National Natural Science Foundation of China(40631004 ; National Natural Science Foundation of China(40631004 ; National Natural Science Foundation of China(40631004 ; National Natural Science Foundation of China(40631004 ; 40202034) ; 40202034) ; 40202034) ; 40202034) ; National Natural Science Foundation of China(40631004 ; National Natural Science Foundation of China(40631004 ; National Natural Science Foundation of China(40631004 ; National Natural Science Foundation of China(40631004 ; 40202034) ; 40202034) ; 40202034) ; 40202034) ; National Natural Science Foundation of China(40631004 ; National Natural Science Foundation of China(40631004 ; National Natural Science Foundation of China(40631004 ; National Natural Science Foundation of China(40631004 ; 40202034) ; 40202034) ; 40202034) ; 40202034) |
内容类型 | 期刊论文 |
源URL | [http://ir.iggcas.ac.cn/handle/132A11/70436] |
专题 | 中国科学院地质与地球物理研究所 |
通讯作者 | Fang, Aimin |
作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Tibet Plateau Res, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China |
推荐引用方式 GB/T 7714 | Fang, Aimin,Liu, Xiaohan,Wang, Weiming,et al. Cenozoic terrestrial palynological assemblages in the glacial erratics from the Grove Mountains, east Antarctica[J]. PROGRESS IN NATURAL SCIENCE,2009,19(7):851-859. |
APA | Fang, Aimin,Liu, Xiaohan,Wang, Weiming,Huang, Feixin,&Yu, Lianjun.(2009).Cenozoic terrestrial palynological assemblages in the glacial erratics from the Grove Mountains, east Antarctica.PROGRESS IN NATURAL SCIENCE,19(7),851-859. |
MLA | Fang, Aimin,et al."Cenozoic terrestrial palynological assemblages in the glacial erratics from the Grove Mountains, east Antarctica".PROGRESS IN NATURAL SCIENCE 19.7(2009):851-859. |
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