Ordovician acritarchs of China and their utility for global palaeobiogeography
Li, Jun (李军); Servais, T
2002
发表期刊BULLETIN DE LA SOCIETE GEOLOGIQUE DE FRANCE
ISSN0037-9409
卷号173期号:5页码:399-406
摘要

Since the 1970s, acritarch workers have recognized two distinct geographic acritarch assemblages in the Ordovician. The first assemblage occurs in the late Tremadoc in low latitude areas. This assemblage, recently redefined by Volkova [1997], has been attributed to warm-water environments. A second "Mediterranean" or "peri-Gondwanan" province, attributed to high latitudes in the southern hemisphere, can easily be recognized in late Tremadoc to Arenig acritarch assemblages. This second palaeogeographic "province", defined by Li [1989] is distributed around the border of Gondwana in a zone reaching from Argentina through northern Africa and peri-Gondwana up to Iran, Pakistan and southern China. In the present work we propose an initial simplified, tentative model of the latitudinal distribution of selected early to middle Ordovician acritarchs. Both "provinces" are plotted on the recent palaeogeographical reconstruction of the early Ordovician of Li and Powell [2001]. It appears that the first "province" is limited to low and intermediate latitudes, i.e., to warmer water environments. However, the generally adopted interpretation that the so called "Mediterranean" or "peri-Gondwanan" geographical assemblage is principally controlled by palaeolatitudes and is considered to be typically "cold-water" has to be revised, because the distribution of this "province" appears related more to the continental arrangement along the Gondwana border than to latitudes. This distribution shows some similarities with recent investigations in Silurian acritarch palaeogeography [Le Herisse and Gourvennec, 1995] that provides evidence that the global distribution of Silurian acritarchs is under the interdependence of continental arrangement, latitudinal position, environmental conditions and oceanic currents, and that it is not simply latitudinally controlled as previous interpretations have suggested. The Yangtze Plaform of southern China presents elements of both early to middle Ordovician "provinces", i.e., from both the "warm-water" and the "peri-Gondwanan" geographic assemblages. The South China Plate is therefore one of the areas that shows typically mixed assemblages. Although it remains difficult to define clearly a "Baltic" province, it is important to note that between the latest Tremadoc and the early Llanvirn a clear distinction of the acritarch assemblages between peri-Gondwana and Baltica is possible.

关键词Acritarchs Ordovician China Palaeobiogeography
语种英语
关键词[WOS]Arenig
WOS研究方向Geology
WOS类目Geosciences, Multidisciplinary
WOS记录号WOS:000178822200001
出版者SOC GEOL FRANCE
文献类型期刊论文
条目标识符http://ir.nigpas.ac.cn/handle/332004/1159
专题中国科学院南京地质古生物研究所
其他
通讯作者Li, Jun (李军)
作者单位1.Acad Sinica, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China
2.Univ Lille 1, UPRESA 8014 CNRS, Lab Paleontol & Paleogeog, F-59655 Villeneuve Dascq, France
推荐引用方式
GB/T 7714
Li, Jun ,Servais, T. Ordovician acritarchs of China and their utility for global palaeobiogeography[J]. BULLETIN DE LA SOCIETE GEOLOGIQUE DE FRANCE,2002,173(5):399-406.
APA Li, Jun ,&Servais, T.(2002).Ordovician acritarchs of China and their utility for global palaeobiogeography.BULLETIN DE LA SOCIETE GEOLOGIQUE DE FRANCE,173(5),399-406.
MLA Li, Jun ,et al."Ordovician acritarchs of China and their utility for global palaeobiogeography".BULLETIN DE LA SOCIETE GEOLOGIQUE DE FRANCE 173.5(2002):399-406.
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