The role of telogenetic injection of magmatically derived CO2in the formation of dawsonite from the Castillo Formation, Chubut Group, Patagonia, Argentina
We report the occurrence of dawsonite, NaAlCO3(OH)2, in volcaniclastic rocks of the Albian hydrocarbon reservoir Castillo Formation, Golfo San Jorge Basin, neighboring the Cañadón Asfalto Basin in Patagonia; this is the first known occurrence in Argentina. Dawsonite replaces crystals pseudomorphical...
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todo:paper_00084476_v52_n3_p513_Comerio2023-10-03T14:06:10Z The role of telogenetic injection of magmatically derived CO2in the formation of dawsonite from the Castillo Formation, Chubut Group, Patagonia, Argentina Comerio, M. Morosi, M.E. Tunik, M. Paredes, J.M. Zalba, P.E. Argentina Dawsonite Magmatic CO2 Patagonia Telogenesis Volcaniclastic rocks Alkalinity Chemical reactions Igneous rocks Kaolinite Rocks Zeolites Argentina Dawsonite Magmatic CO<sub>2</sub> Patagonia Telogenesis Volcaniclastics Carbon dioxide carbon dioxide clastic rock dawsonite igneous rock porosity Argentina Patagonia We report the occurrence of dawsonite, NaAlCO3(OH)2, in volcaniclastic rocks of the Albian hydrocarbon reservoir Castillo Formation, Golfo San Jorge Basin, neighboring the Cañadón Asfalto Basin in Patagonia; this is the first known occurrence in Argentina. Dawsonite replaces crystals pseudomorphically, and can also be found as a cement together with other carbonates, which induced a loss in the porosity of the host rock. Previous studies reported incomplete chemical reactions which suggested that oligoclase and analcime were dawsonite precursors. In the present work we document either totally achieved or incomplete chemical reactions which led to the transformation of analcime into kaolinite and dawsonite into kaolinite, respectively. These facts allowed us to deduce that the transformation of analcime into kaolinite was via dawsonite, minerals formed during different stages under a telogenetic regime. Dawsonite values of δ13C PDB (-0.1 to 1.5‰) are consistent with a magmatic source of CO2 provided by hypabyssal, basic alkaline igneous rocks of regional importance starting in the Eocene. We identify both internal and external sources of Na and Al used in the formation of dawsonite. Fil:Comerio, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tunik, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00084476_v52_n3_p513_Comerio |
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Universidad de Buenos Aires |
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I-28 |
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R-134 |
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Argentina Dawsonite Magmatic CO2 Patagonia Telogenesis Volcaniclastic rocks Alkalinity Chemical reactions Igneous rocks Kaolinite Rocks Zeolites Argentina Dawsonite Magmatic CO<sub>2</sub> Patagonia Telogenesis Volcaniclastics Carbon dioxide carbon dioxide clastic rock dawsonite igneous rock porosity Argentina Patagonia |
| spellingShingle |
Argentina Dawsonite Magmatic CO2 Patagonia Telogenesis Volcaniclastic rocks Alkalinity Chemical reactions Igneous rocks Kaolinite Rocks Zeolites Argentina Dawsonite Magmatic CO<sub>2</sub> Patagonia Telogenesis Volcaniclastics Carbon dioxide carbon dioxide clastic rock dawsonite igneous rock porosity Argentina Patagonia Comerio, M. Morosi, M.E. Tunik, M. Paredes, J.M. Zalba, P.E. The role of telogenetic injection of magmatically derived CO2in the formation of dawsonite from the Castillo Formation, Chubut Group, Patagonia, Argentina |
| topic_facet |
Argentina Dawsonite Magmatic CO2 Patagonia Telogenesis Volcaniclastic rocks Alkalinity Chemical reactions Igneous rocks Kaolinite Rocks Zeolites Argentina Dawsonite Magmatic CO<sub>2</sub> Patagonia Telogenesis Volcaniclastics Carbon dioxide carbon dioxide clastic rock dawsonite igneous rock porosity Argentina Patagonia |
| description |
We report the occurrence of dawsonite, NaAlCO3(OH)2, in volcaniclastic rocks of the Albian hydrocarbon reservoir Castillo Formation, Golfo San Jorge Basin, neighboring the Cañadón Asfalto Basin in Patagonia; this is the first known occurrence in Argentina. Dawsonite replaces crystals pseudomorphically, and can also be found as a cement together with other carbonates, which induced a loss in the porosity of the host rock. Previous studies reported incomplete chemical reactions which suggested that oligoclase and analcime were dawsonite precursors. In the present work we document either totally achieved or incomplete chemical reactions which led to the transformation of analcime into kaolinite and dawsonite into kaolinite, respectively. These facts allowed us to deduce that the transformation of analcime into kaolinite was via dawsonite, minerals formed during different stages under a telogenetic regime. Dawsonite values of δ13C PDB (-0.1 to 1.5‰) are consistent with a magmatic source of CO2 provided by hypabyssal, basic alkaline igneous rocks of regional importance starting in the Eocene. We identify both internal and external sources of Na and Al used in the formation of dawsonite. |
| format |
JOUR |
| author |
Comerio, M. Morosi, M.E. Tunik, M. Paredes, J.M. Zalba, P.E. |
| author_facet |
Comerio, M. Morosi, M.E. Tunik, M. Paredes, J.M. Zalba, P.E. |
| author_sort |
Comerio, M. |
| title |
The role of telogenetic injection of magmatically derived CO2in the formation of dawsonite from the Castillo Formation, Chubut Group, Patagonia, Argentina |
| title_short |
The role of telogenetic injection of magmatically derived CO2in the formation of dawsonite from the Castillo Formation, Chubut Group, Patagonia, Argentina |
| title_full |
The role of telogenetic injection of magmatically derived CO2in the formation of dawsonite from the Castillo Formation, Chubut Group, Patagonia, Argentina |
| title_fullStr |
The role of telogenetic injection of magmatically derived CO2in the formation of dawsonite from the Castillo Formation, Chubut Group, Patagonia, Argentina |
| title_full_unstemmed |
The role of telogenetic injection of magmatically derived CO2in the formation of dawsonite from the Castillo Formation, Chubut Group, Patagonia, Argentina |
| title_sort |
role of telogenetic injection of magmatically derived co2in the formation of dawsonite from the castillo formation, chubut group, patagonia, argentina |
| url |
http://hdl.handle.net/20.500.12110/paper_00084476_v52_n3_p513_Comerio |
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