Siliciclastic–carbonate mixing modes in the river-mouth bar palaeogeography of the Upper Cretaceous Garudamangalam Sandstone (Ariyalur, India)
Mixed siliciclastic–carbonate rocks constitute the Upper Cretaceous Garuda-mangalam Sandstone Formation, Ariyalur (India), and offer an opportunity to look into the broad spectrum of mixing of compositionally and genetically different components. The palaeogeographic reconstruction indicates that de...
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| Format: | Article |
| Language: | English |
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Elsevier
2014-07-01
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| Series: | Journal of Palaeogeography |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S209538361530078X |
| _version_ | 1819278663528480768 |
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| author | Subir Sarkar Nivedita Chakraborty Anudeb Mandal Santanu Banerjee Pradip K. Bose |
| author_facet | Subir Sarkar Nivedita Chakraborty Anudeb Mandal Santanu Banerjee Pradip K. Bose |
| author_sort | Subir Sarkar |
| collection | DOAJ |
| description | Mixed siliciclastic–carbonate rocks constitute the Upper Cretaceous Garuda-mangalam Sandstone Formation, Ariyalur (India), and offer an opportunity to look into the broad spectrum of mixing of compositionally and genetically different components. The palaeogeographic reconstruction indicates that deposition in the nearshore zone differed strongly in energy and active processes operatives due to the presence of a shore-parallel river-mouth bar. The western wing of the Mississippi bird-foot delta is considered to be a present-day analogon. Facies analysis in combination with petrography clearly shows the variability in palaeoenvironmental characteristics, both biogenic and non-biogenic. It also indicates diagenetic uptake of carbonate that filled empty spaces and actively replaced original components. Chemical staining followed by limited application of cathodoluminescence and energy dispersive X-ray analysis (EDAX) hint at intricacies in mixing arising from the compositional variations in the carbonate components. A model of siliciclastic–carbonate sediment mixing, including both the depositional and diagenetic developments, is presented; it is aimed at generating a better overview of, and a deeper insight into, the physical and chemical mechanisms involved. |
| first_indexed | 2024-12-24T00:15:35Z |
| format | Article |
| id | doaj.art-385e9b1eac3f405fa7f318e865d5e513 |
| institution | Directory Open Access Journal |
| issn | 2095-3836 |
| language | English |
| last_indexed | 2024-12-24T00:15:35Z |
| publishDate | 2014-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Palaeogeography |
| spelling | doaj.art-385e9b1eac3f405fa7f318e865d5e5132022-12-21T17:24:45ZengElsevierJournal of Palaeogeography2095-38362014-07-013323325610.3724/SP.J.1261.2014.00054Siliciclastic–carbonate mixing modes in the river-mouth bar palaeogeography of the Upper Cretaceous Garudamangalam Sandstone (Ariyalur, India)Subir Sarkar0Nivedita Chakraborty1Anudeb Mandal2Santanu Banerjee3Pradip K. Bose4Department of Geological Sciences, Jadavpur University, Kolkata–700032, IndiaDepartment of Geological Sciences, Jadavpur University, Kolkata–700032, IndiaDepartment of Geological Sciences, Jadavpur University, Kolkata–700032, IndiaDepartment of Earth Sciences, Indian Institute of Technology Bombay, Powai, Mumbai–400076, IndiaDepartment of Geological Sciences, Jadavpur University, Kolkata–700032, IndiaMixed siliciclastic–carbonate rocks constitute the Upper Cretaceous Garuda-mangalam Sandstone Formation, Ariyalur (India), and offer an opportunity to look into the broad spectrum of mixing of compositionally and genetically different components. The palaeogeographic reconstruction indicates that deposition in the nearshore zone differed strongly in energy and active processes operatives due to the presence of a shore-parallel river-mouth bar. The western wing of the Mississippi bird-foot delta is considered to be a present-day analogon. Facies analysis in combination with petrography clearly shows the variability in palaeoenvironmental characteristics, both biogenic and non-biogenic. It also indicates diagenetic uptake of carbonate that filled empty spaces and actively replaced original components. Chemical staining followed by limited application of cathodoluminescence and energy dispersive X-ray analysis (EDAX) hint at intricacies in mixing arising from the compositional variations in the carbonate components. A model of siliciclastic–carbonate sediment mixing, including both the depositional and diagenetic developments, is presented; it is aimed at generating a better overview of, and a deeper insight into, the physical and chemical mechanisms involved.http://www.sciencedirect.com/science/article/pii/S209538361530078Xmixed siliciclastic–carbonate successionGarudamangalam Sandstone FormationUpper Cretaceousriver-mouth barIndia |
| spellingShingle | Subir Sarkar Nivedita Chakraborty Anudeb Mandal Santanu Banerjee Pradip K. Bose Siliciclastic–carbonate mixing modes in the river-mouth bar palaeogeography of the Upper Cretaceous Garudamangalam Sandstone (Ariyalur, India) Journal of Palaeogeography mixed siliciclastic–carbonate succession Garudamangalam Sandstone Formation Upper Cretaceous river-mouth bar India |
| title | Siliciclastic–carbonate mixing modes in the river-mouth bar palaeogeography of the Upper Cretaceous Garudamangalam Sandstone (Ariyalur, India) |
| title_full | Siliciclastic–carbonate mixing modes in the river-mouth bar palaeogeography of the Upper Cretaceous Garudamangalam Sandstone (Ariyalur, India) |
| title_fullStr | Siliciclastic–carbonate mixing modes in the river-mouth bar palaeogeography of the Upper Cretaceous Garudamangalam Sandstone (Ariyalur, India) |
| title_full_unstemmed | Siliciclastic–carbonate mixing modes in the river-mouth bar palaeogeography of the Upper Cretaceous Garudamangalam Sandstone (Ariyalur, India) |
| title_short | Siliciclastic–carbonate mixing modes in the river-mouth bar palaeogeography of the Upper Cretaceous Garudamangalam Sandstone (Ariyalur, India) |
| title_sort | siliciclastic carbonate mixing modes in the river mouth bar palaeogeography of the upper cretaceous garudamangalam sandstone ariyalur india |
| topic | mixed siliciclastic–carbonate succession Garudamangalam Sandstone Formation Upper Cretaceous river-mouth bar India |
| url | http://www.sciencedirect.com/science/article/pii/S209538361530078X |
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