TITLE:
Provenance, Tectonics and Paleoclimate of Permo-Carboniferous Talchir Formation in Son-Mahanadi Basin, Central India with Special Reference to Chirimiri: Using Petrographical Interpretation
AUTHORS:
Khansa Zaidi, Sarwar Rais, Abdullah Khan, Mohd Masroor Alam
KEYWORDS:
Son-Mahanadi; Talchir Formation; Chirimiri; Provenance; Tectonics; Petrography; Paleoclimate
JOURNAL NAME:
International Journal of Geosciences,
Vol.5 No.1,
January
23,
2014
ABSTRACT: The present study deals
with the petrographic interpretation of Talchir Formation sandstone, in and
around Chirimiri area, Koriya district, Chhattisgarh state India located in
Son-Mahanadi basin. This basin is an elongate graben showing northwest-southeast
trend and considered to be one of the largest intra-cratonic rift basins of
Indian peninsula. Talchir Formation is the lowermost unit of thick classical
Gondwana sedimentary succession and rests unconformably on Precambrian
basement. The petrographic studies consisting of point count show the presence
of quartz as a dominant framework mineral with subordinate amounts of feldspars
and rock fragments. The data plot in the fields of cratonic interior and transitional margin of
continental block provenance. In the Qt (quartz)-F (feldspar)-L (lithic
fragments) triangular diagram, indicating the source of these sediments was located in transitional margin and
continental block provenance. The petrographic classification suggests that
this formation in the study area dominantly contains compositionally immature to submature arkosic,
sub-arkosic and lithic-arkosic sandstones. The bivariate plot between Qp/(F+R)
vs. Qt/(F+R) indicates changes in climatic conditions from semi-arid to semi-humid during
Permo-Carboniferous period.