Abstract
The Upper Callovian-Oxfordian strata of the Kachchh Basin, western India, record three positive excursions of phosphorus. They have been documented in three sections of the Chari Formation from different parts of the basin. Corroboration of field and petrographic data with trends of major and trace elemental data and elemental ratios of the strata revealed that these excursions were coeval with reduced chemical weathering in the source area and significant reduction of siliciclastic influx to the depositional sites. The study also revealed the intrabasinal source of P, and minor sea-level fluctuations and resultant episodic sediment recycling as the causative factors. Considering the geographic locations of the three sections, the phosphorus anomalies seem to be controlled by a regional and/or basin-scale process, if not linked with global signals. Temporal resolution of these anomalies suggests that the processes were episodic and related to short term climate/relative sea-level cycles, the durations of which could be unraveled with high-resolution biostratigraphic data.
| Original language | English |
|---|---|
| Pages (from-to) | 141-148 |
| Number of pages | 8 |
| Journal | Chemie der Erde - Geochemistry |
| Volume | 72 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 06-2012 |
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All Science Journal Classification (ASJC) codes
- Geophysics
- Geochemistry and Petrology
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Anomalous phosphorus episodes during Callovian-Oxfordian times in the Kachchh Basin, western India : Implications for palaeoclimate, productivity, and weathering. / Ramkumar, Muthuvairavasamy; Alberti, Matthias; Fürsich, Franz T.; Pandey, Dhirendra Kumar.
In: Chemie der Erde - Geochemistry, Vol. 72, No. 2, 06.2012, p. 141-148.Research output: Contribution to journal › Article
TY - JOUR
T1 - Anomalous phosphorus episodes during Callovian-Oxfordian times in the Kachchh Basin, western India
T2 - Implications for palaeoclimate, productivity, and weathering
AU - Ramkumar, Muthuvairavasamy
AU - Alberti, Matthias
AU - Fürsich, Franz T.
AU - Pandey, Dhirendra Kumar
PY - 2012/6
Y1 - 2012/6
N2 - The Upper Callovian-Oxfordian strata of the Kachchh Basin, western India, record three positive excursions of phosphorus. They have been documented in three sections of the Chari Formation from different parts of the basin. Corroboration of field and petrographic data with trends of major and trace elemental data and elemental ratios of the strata revealed that these excursions were coeval with reduced chemical weathering in the source area and significant reduction of siliciclastic influx to the depositional sites. The study also revealed the intrabasinal source of P, and minor sea-level fluctuations and resultant episodic sediment recycling as the causative factors. Considering the geographic locations of the three sections, the phosphorus anomalies seem to be controlled by a regional and/or basin-scale process, if not linked with global signals. Temporal resolution of these anomalies suggests that the processes were episodic and related to short term climate/relative sea-level cycles, the durations of which could be unraveled with high-resolution biostratigraphic data.
AB - The Upper Callovian-Oxfordian strata of the Kachchh Basin, western India, record three positive excursions of phosphorus. They have been documented in three sections of the Chari Formation from different parts of the basin. Corroboration of field and petrographic data with trends of major and trace elemental data and elemental ratios of the strata revealed that these excursions were coeval with reduced chemical weathering in the source area and significant reduction of siliciclastic influx to the depositional sites. The study also revealed the intrabasinal source of P, and minor sea-level fluctuations and resultant episodic sediment recycling as the causative factors. Considering the geographic locations of the three sections, the phosphorus anomalies seem to be controlled by a regional and/or basin-scale process, if not linked with global signals. Temporal resolution of these anomalies suggests that the processes were episodic and related to short term climate/relative sea-level cycles, the durations of which could be unraveled with high-resolution biostratigraphic data.
UR - http://www.scopus.com/inward/record.url?scp=84863308040&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84863308040&partnerID=8YFLogxK
U2 - 10.1016/j.chemer.2012.01.002
DO - 10.1016/j.chemer.2012.01.002
M3 - Article
VL - 72
SP - 141
EP - 148
JO - Chemie der Erde
JF - Chemie der Erde
SN - 0009-2819
IS - 2
ER -