Chuaria circularis from the early Mesoproterozoic Suket Shale, Vindhyan Supergroup, India: Insights from light and electron microscopy and pyrolysis–gas chromatography

Journal of Earth system science

Santanu Banerjee1²  Silambuchelvan Jeevankumar1²  Bernd-Dietrich Erdtmann2³  Suryendu Dutta1 2 3²  Ulrich Mann3¹  Michael Steiner2³ 

[1] Forschungszentrum Jülich, Institut für Chemie und Dynamik der Geosphäre, Sedimentäre Systeme, D-52425 Jülich, Germany.$$;Department of Earth Sciences, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India.$$;Technische Universität Berlin, Sekr. Ack 14, Ackerstrasse 71-76, 13355 Berlin, Germany.$$

关键词: Chuaria circularis;    Mesoproterozoic;    Vindhyan Supergroup;    pyrolysis–gas chromatography.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

Chuaria circularis (Walcott 1899) from the Suket Shale of the Vindhyan Supergroup (central India) has been reinvestigated for its morphology and chemical composition using biostatistics,electron microscopy and pyrolysis –gas chromatography.Morphology and microscopic investigations provide little clues on the specific biological affinity of Chuaria as numerous preservational artifacts seem to be incorporated.On the contrary,the predominance of 𝑛-aliphatic pyrolysates of presently studied Chuaria from India rather supports an algal affinity.Moreover,the reflectance of C. circularis can be used to obtain a comparative maturity parameter of the Precambrian sediments.The review of the age and geographical distribution of C. circularis constrains that this species cannot be considered as an index fossil for the Proterozoic time.

【 授权许可】

Unknown