Prospect of studying Bijaigarh Black Shale, Vindhyan Supergroup, and its implication for Mesoproterzoic oxygenation

  • A H Ansari

Abstract

This paper reviews the studies of Bijaigarh Shale
in the wake of improved trace element and sulphur
isotope tools as a potential avenue for the hitherto
unknown oxygen fluctuations during Mesoproterozoic
Era. Black shale is traditionally known as an indicator
for the anaerobic environment. However, the source
for high organic remains in the black shales suggests a
high primary production pathway which is most likely
oxygen-producing photosynthesis. That means atmospheric
carbon would have been sequestered in aerobic
condition. Mesoproterozoic Era (1600-1000Ma) also
has many black shale strata, and it is traditionally accepted
that the Mesoproterozoic ocean was sulphidic
and anaerobic in nature which retarded the biological
evolution for a long time and delayed augmentation
of metazoa. However, with improved understanding
of trace elements and sulphur isotope analysis very
recently Mukherjee and Large (2016) demonstrated a
fluctuation in oxygen condition during Mesoproterozoic
Era.

Published
2017-12-08
How to Cite
ANSARI, A H. Prospect of studying Bijaigarh Black Shale, Vindhyan Supergroup, and its implication for Mesoproterzoic oxygenation. Bulletin of Environmental and Scientific Research, [S.l.], v. 6, n. 3-4, p. 8-13, dec. 2017. ISSN 2278-5205. Available at: <http://besr.org.in/index.php/besr/article/view/78>. Date accessed: 17 june 2018.
Section
Articles