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Acritarch assemblages from the Middle-Upper Ordovician in the Aksu area, northwestern margin of the Tarim Basin, Xinjiang, China
Yan, Kui (燕夔)1; Servais, Thomas3; Shan, Longlong1,2; Li, Jun (李军)4
2020-02-01
Source PublicationNEUES JAHRBUCH FUR GEOLOGIE UND PALAONTOLOGIE-ABHANDLUNGEN
ISSN0077-7749
Volume295Issue:2Pages:169-183
Abstract

Upper Darriwilian to middle Katian (Ordovician) outcrops are well exposed in the Kalpin (Aksu) area, in the northwestern margin of the Tarim Basin, Xinjiang, China. The Dawanxigou and Sishichang sections in the Kalpin area, near the Dawangou Auxiliary Stratotype Section and Point (ASSP), were palynologically investigated. Both sections provide well-preserved acritarch assemblages dominated by acanthomorph, sphaeromorph and netromorph morphotypes, attributed to 36 species and 20 genera. A comparison of the acritarch assemblages with coeval microfloras from other parts of the world confirms a wide cosmopolitism distribution, indicative of a breakdown of acritarch provincialism during the Late Ordovician. Several acritarchs from the Tarim Basin are restricted to the Late Ordovician, and as they are distributed worldwide, they present a potential for global bio-stratigraphical correlations. The acritarch assemblages from the different sections of the northwestern part of the Tarim Basin show slightly variable compositions, probably caused by different palaeo-ecological settings. The diversity and compositional changes of the acritarch assemblages, combined with the sedimentological evidence, suggest a transgressive sequence from the Sargan Formation to the Qilang Formation.

KeywordPalynology biostratigraphy palaeogeography Kalpin Late Ordovician acritarchs Tarim Basin
DOI10.1127/njgpa/2020/0882
Indexed BySCI
Language英语
WOS KeywordSILURIAN ACRITARCHS ; BIOSTRATIGRAPHY ; BOUNDARY ; DAWANGOU ; MICROPHYTOPLANKTON ; STRATIGRAPHY ; CHITINOZOANS ; CONODONTS ; SOUTHERN ; BALTICA
Funding ProjectNational Natural Science Foundation of China[NSFC41472007] ; Chinese Academy of Sciences[XDB26000000]
WOS Research AreaPaleontology
WOS SubjectPaleontology
WOS IDWOS:000518779700007
Funding OrganizationNational Natural Science Foundation of China ; Chinese Academy of Sciences
PublisherE SCHWEIZERBARTSCHE VERLAGSBUCHHANDLUNG
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/31671
Collection中国科学院南京地质古生物研究所
Corresponding AuthorYan, Kui (燕夔)
Affiliation1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Lille, UMR 8198, SN5, Evoecopaleo,CNRS, F-59000 Lille, France
4.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Yan, Kui ,Servais, Thomas,Shan, Longlong,et al. Acritarch assemblages from the Middle-Upper Ordovician in the Aksu area, northwestern margin of the Tarim Basin, Xinjiang, China[J]. NEUES JAHRBUCH FUR GEOLOGIE UND PALAONTOLOGIE-ABHANDLUNGEN,2020,295(2):169-183.
APA Yan, Kui ,Servais, Thomas,Shan, Longlong,&Li, Jun .(2020).Acritarch assemblages from the Middle-Upper Ordovician in the Aksu area, northwestern margin of the Tarim Basin, Xinjiang, China.NEUES JAHRBUCH FUR GEOLOGIE UND PALAONTOLOGIE-ABHANDLUNGEN,295(2),169-183.
MLA Yan, Kui ,et al."Acritarch assemblages from the Middle-Upper Ordovician in the Aksu area, northwestern margin of the Tarim Basin, Xinjiang, China".NEUES JAHRBUCH FUR GEOLOGIE UND PALAONTOLOGIE-ABHANDLUNGEN 295.2(2020):169-183.
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