Interpretation of palaeoclimate, relative sea level and scale of stratigraphic correlation through spatio-temporal variations of depositional and diagenetic environments: a case study
Ramkumar M, Fürsich F, Alberti M (2014)
Publication Language: English
Publication Type: Book chapter / Article in edited volumes
Publication year: 2014
Publisher: Studium Press
Edited Volumes: Advances in Petroleum Engineering
City/Town: Houston
Pages Range: 284-307
Abstract
Interpretations of palaeoclimate, relative sea level, depositional and
diagenetic conditions of ancient strata are routine tasks for sedimentologists
and hydrocarbon exploration professionals. In this paper, we present a case
study to demonstrate how affirmatively different scales of stratigraphic
correlation could be attempted based on documentation of spatio-temporal
variations of depositional and diagenetic environments. The Dhosa Oolite
Member of the Chari Formation of the Kachchh Basin, western India,
deposited under Oxfordian eustatic sea-level rise, is known for its ooid
content, hardground surfaces and faunal composition. Based on these traits
and facies characteristics, traditionally it is correlated with global oolite
peak, documented in Madagascar and many European Jurassic sections
located at France, England, Poland, etc. In the Kachchh mainland, this
member shows extensive development of iron crusts, well cemented cap rock
and reworked fauna, recognizable for over 100 kilometers in its strike
direction due to which it is considered to be a regional marker that could
facilitate stratigraphic correlation not only in the Kachchh basin, but also
with coeval strata of the adjacently located Jaisalmer Basin. Statistical
analyses of geochemical and petrographic data of the Upper Callovian-
Oxfordian strata of the Kachchh Basin, western India, in which the Dhosa Oolite Member is also a part, revealed that there are spatio-temporal
variations of depositional and diagenetic characteristics observable in terms of
unique variations in petrographic, mineralogical and geochemical compositions
between and within different stratigraphic units and sections under study.
Distinct palaeoclimatic and environmental conditions prevalent during the
deposition of Dhosa Oolite Member, in terms of rise in sea-level, absence of
chemical weathering in the source area, cessation of siliciclastic influx might
have promoted enhanced carbonate and ooid production and preservation. While
this distinct nature of DOM, as observable in lithological as well as geochemical
characteristics offer an unique potential to correlate the strata with coeval
deposits elsewhere, occurrences of omission surfaces, recycling events and spatio-
temporal variations of diagenetic intensity, suggest that caution has to be
exercised while correlating this member with coeval strata located elsewhere.
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Involved external institutions
India (IN)
Germany (DE)How to cite
APA:
Ramkumar, M., Fürsich, F., & Alberti, M. (2014). Interpretation of palaeoclimate, relative sea level and scale of stratigraphic correlation through spatio-temporal variations of depositional and diagenetic environments: a case study. In Advances in Petroleum Engineering. (pp. 284-307). Houston: Studium Press.
MLA:
Ramkumar, Muthuvairavasamy, Franz Fürsich, and Matthias Alberti. "Interpretation of palaeoclimate, relative sea level and scale of stratigraphic correlation through spatio-temporal variations of depositional and diagenetic environments: a case study." Advances in Petroleum Engineering. Houston: Studium Press, 2014. 284-307.
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