Stable isotope analyses of belemnites from the Kachchh Basin, western India: Paleoclimatic implications for the Middle to Late Jurassic transition

Matthias Alberti, Franz T. Fürsich, Dhirendra K. Pandey, Mu Ramkumar

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Stable isotope analyses of 61 diagenetically unaltered belemnite rostra from the Middle to Late Jurassic of the Kachchh Basin of western India suggest stable paleotemperatures across the Callovian-Oxfordian boundary (~14°C). Only at the end of the Middle Oxfordian water temperatures drop for more than 3°C before reaching again higher values during the Kimmeridgian (~12. 3°C). The data do not support polar glaciations proposed for the Middle to Late Jurassic transition, which necessarily would have led to a global temperature and sea-level minimum at the boundary. Callovian to Oxfordian rocks in the Kachchh Basin point to a gradual shallowing corresponding to a slight fall in relative sea level. However, the magnitude of this regression is comparatively small, and the sea-level minimum is reached in the late Early Oxfordian and not close to the boundary. Results from the Kachchh Basin therefore, imply almost stable climatic conditions during the Middle to Late Jurassic transition and do not show any evidence for polar glaciations.

Original languageEnglish
Pages (from-to)261-278
Number of pages18
JournalFacies
Volume58
Issue number2
DOIs
Publication statusPublished - 04-2012

Fingerprint

Oxfordian
stable isotope
Jurassic
Callovian
sea level
basin
glaciation
belemnite
Kimmeridgian
paleotemperature
water temperature
rock
temperature

All Science Journal Classification (ASJC) codes

  • Geology
  • Palaeontology
  • Stratigraphy

Cite this

Alberti, Matthias ; Fürsich, Franz T. ; Pandey, Dhirendra K. ; Ramkumar, Mu. / Stable isotope analyses of belemnites from the Kachchh Basin, western India : Paleoclimatic implications for the Middle to Late Jurassic transition. In: Facies. 2012 ; Vol. 58, No. 2. pp. 261-278.
@article{d2260de51aa94c8683322ba40688e360,
title = "Stable isotope analyses of belemnites from the Kachchh Basin, western India: Paleoclimatic implications for the Middle to Late Jurassic transition",
abstract = "Stable isotope analyses of 61 diagenetically unaltered belemnite rostra from the Middle to Late Jurassic of the Kachchh Basin of western India suggest stable paleotemperatures across the Callovian-Oxfordian boundary (~14°C). Only at the end of the Middle Oxfordian water temperatures drop for more than 3°C before reaching again higher values during the Kimmeridgian (~12. 3°C). The data do not support polar glaciations proposed for the Middle to Late Jurassic transition, which necessarily would have led to a global temperature and sea-level minimum at the boundary. Callovian to Oxfordian rocks in the Kachchh Basin point to a gradual shallowing corresponding to a slight fall in relative sea level. However, the magnitude of this regression is comparatively small, and the sea-level minimum is reached in the late Early Oxfordian and not close to the boundary. Results from the Kachchh Basin therefore, imply almost stable climatic conditions during the Middle to Late Jurassic transition and do not show any evidence for polar glaciations.",
author = "Matthias Alberti and F{\"u}rsich, {Franz T.} and Pandey, {Dhirendra K.} and Mu Ramkumar",
year = "2012",
month = "4",
doi = "10.1007/s10347-011-0278-9",
language = "English",
volume = "58",
pages = "261--278",
journal = "Facies",
issn = "0172-9179",
publisher = "Springer Verlag",
number = "2",

}

Stable isotope analyses of belemnites from the Kachchh Basin, western India : Paleoclimatic implications for the Middle to Late Jurassic transition. / Alberti, Matthias; Fürsich, Franz T.; Pandey, Dhirendra K.; Ramkumar, Mu.

In: Facies, Vol. 58, No. 2, 04.2012, p. 261-278.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Stable isotope analyses of belemnites from the Kachchh Basin, western India

T2 - Paleoclimatic implications for the Middle to Late Jurassic transition

AU - Alberti, Matthias

AU - Fürsich, Franz T.

AU - Pandey, Dhirendra K.

AU - Ramkumar, Mu

PY - 2012/4

Y1 - 2012/4

N2 - Stable isotope analyses of 61 diagenetically unaltered belemnite rostra from the Middle to Late Jurassic of the Kachchh Basin of western India suggest stable paleotemperatures across the Callovian-Oxfordian boundary (~14°C). Only at the end of the Middle Oxfordian water temperatures drop for more than 3°C before reaching again higher values during the Kimmeridgian (~12. 3°C). The data do not support polar glaciations proposed for the Middle to Late Jurassic transition, which necessarily would have led to a global temperature and sea-level minimum at the boundary. Callovian to Oxfordian rocks in the Kachchh Basin point to a gradual shallowing corresponding to a slight fall in relative sea level. However, the magnitude of this regression is comparatively small, and the sea-level minimum is reached in the late Early Oxfordian and not close to the boundary. Results from the Kachchh Basin therefore, imply almost stable climatic conditions during the Middle to Late Jurassic transition and do not show any evidence for polar glaciations.

AB - Stable isotope analyses of 61 diagenetically unaltered belemnite rostra from the Middle to Late Jurassic of the Kachchh Basin of western India suggest stable paleotemperatures across the Callovian-Oxfordian boundary (~14°C). Only at the end of the Middle Oxfordian water temperatures drop for more than 3°C before reaching again higher values during the Kimmeridgian (~12. 3°C). The data do not support polar glaciations proposed for the Middle to Late Jurassic transition, which necessarily would have led to a global temperature and sea-level minimum at the boundary. Callovian to Oxfordian rocks in the Kachchh Basin point to a gradual shallowing corresponding to a slight fall in relative sea level. However, the magnitude of this regression is comparatively small, and the sea-level minimum is reached in the late Early Oxfordian and not close to the boundary. Results from the Kachchh Basin therefore, imply almost stable climatic conditions during the Middle to Late Jurassic transition and do not show any evidence for polar glaciations.

UR - http://www.scopus.com/inward/record.url?scp=84858623351&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84858623351&partnerID=8YFLogxK

U2 - 10.1007/s10347-011-0278-9

DO - 10.1007/s10347-011-0278-9

M3 - Article

AN - SCOPUS:84858623351

VL - 58

SP - 261

EP - 278

JO - Facies

JF - Facies

SN - 0172-9179

IS - 2

ER -