Evidence of precessional and eccentricity orbital cycles in a Tithonian source rock: The mid-outer carbonate ramp of the Vaca muerta formation, Northern Neuqué Basin, Argentina
Basin to mid-ramp cyclic facies of the Tithonian Vaca Muerta Formation are exposed in the Loncoche Creek section of the Neuquen Basin, Mendoza province, Argentina. This unit is characterized by a decimeter-scale rhythmic alternation of marls, shales and limestones and extends from the lower Tithonia...
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2011
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01491423_v95_n9_p1459_Kietzmann http://hdl.handle.net/20.500.12110/paper_01491423_v95_n9_p1459_Kietzmann |
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paper:paper_01491423_v95_n9_p1459_Kietzmann2023-06-08T15:13:13Z Evidence of precessional and eccentricity orbital cycles in a Tithonian source rock: The mid-outer carbonate ramp of the Vaca muerta formation, Northern Neuqué Basin, Argentina Argentina Cyclic patterns Cyclicity Facies analysis Milankovitch Northern Hemispheres Orbital eccentricity Source rocks Spectrum analysis Fertilizers biostratigraphy carbonate ramp cyclostratigraphy eccentricity facies limestone marl precession shale source rock spectral analysis Tithonian Argentina Neuquen Basin Basin to mid-ramp cyclic facies of the Tithonian Vaca Muerta Formation are exposed in the Loncoche Creek section of the Neuquen Basin, Mendoza province, Argentina. This unit is characterized by a decimeter-scale rhythmic alternation of marls, shales and limestones and extends from the lower Tithonian to the upper Berriasian. Cyclostratigraphic studies based on a detailed facies analysis allowed the identification of cyclic patterns with frequencies within the Milankovitch band. According to biostratigraphic data, the dominant cycle in the studied section has a period of 20 k.y., which correlates with the Earth's axis precession element. Spectral analysis based on a series of compacted and decompacted cycle thickness identified a subordinate frequency of about 90 to 120 k.y., which we interpret as the modulation of the precessional cycle caused by the Earth's orbital eccentricity. The strength of the precession signal, together with the absence of a well-defined cyclicity attributable to the obliquity orbital cycle [i.e., ̃40 k.y.), is in agreement with previous data from the Northern Hemisphere. © 2011. The American Association of Petroleum Geologists. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01491423_v95_n9_p1459_Kietzmann http://hdl.handle.net/20.500.12110/paper_01491423_v95_n9_p1459_Kietzmann |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Argentina Cyclic patterns Cyclicity Facies analysis Milankovitch Northern Hemispheres Orbital eccentricity Source rocks Spectrum analysis Fertilizers biostratigraphy carbonate ramp cyclostratigraphy eccentricity facies limestone marl precession shale source rock spectral analysis Tithonian Argentina Neuquen Basin |
| spellingShingle |
Argentina Cyclic patterns Cyclicity Facies analysis Milankovitch Northern Hemispheres Orbital eccentricity Source rocks Spectrum analysis Fertilizers biostratigraphy carbonate ramp cyclostratigraphy eccentricity facies limestone marl precession shale source rock spectral analysis Tithonian Argentina Neuquen Basin Evidence of precessional and eccentricity orbital cycles in a Tithonian source rock: The mid-outer carbonate ramp of the Vaca muerta formation, Northern Neuqué Basin, Argentina |
| topic_facet |
Argentina Cyclic patterns Cyclicity Facies analysis Milankovitch Northern Hemispheres Orbital eccentricity Source rocks Spectrum analysis Fertilizers biostratigraphy carbonate ramp cyclostratigraphy eccentricity facies limestone marl precession shale source rock spectral analysis Tithonian Argentina Neuquen Basin |
| description |
Basin to mid-ramp cyclic facies of the Tithonian Vaca Muerta Formation are exposed in the Loncoche Creek section of the Neuquen Basin, Mendoza province, Argentina. This unit is characterized by a decimeter-scale rhythmic alternation of marls, shales and limestones and extends from the lower Tithonian to the upper Berriasian. Cyclostratigraphic studies based on a detailed facies analysis allowed the identification of cyclic patterns with frequencies within the Milankovitch band. According to biostratigraphic data, the dominant cycle in the studied section has a period of 20 k.y., which correlates with the Earth's axis precession element. Spectral analysis based on a series of compacted and decompacted cycle thickness identified a subordinate frequency of about 90 to 120 k.y., which we interpret as the modulation of the precessional cycle caused by the Earth's orbital eccentricity. The strength of the precession signal, together with the absence of a well-defined cyclicity attributable to the obliquity orbital cycle [i.e., ̃40 k.y.), is in agreement with previous data from the Northern Hemisphere. © 2011. The American Association of Petroleum Geologists. |
| title |
Evidence of precessional and eccentricity orbital cycles in a Tithonian source rock: The mid-outer carbonate ramp of the Vaca muerta formation, Northern Neuqué Basin, Argentina |
| title_short |
Evidence of precessional and eccentricity orbital cycles in a Tithonian source rock: The mid-outer carbonate ramp of the Vaca muerta formation, Northern Neuqué Basin, Argentina |
| title_full |
Evidence of precessional and eccentricity orbital cycles in a Tithonian source rock: The mid-outer carbonate ramp of the Vaca muerta formation, Northern Neuqué Basin, Argentina |
| title_fullStr |
Evidence of precessional and eccentricity orbital cycles in a Tithonian source rock: The mid-outer carbonate ramp of the Vaca muerta formation, Northern Neuqué Basin, Argentina |
| title_full_unstemmed |
Evidence of precessional and eccentricity orbital cycles in a Tithonian source rock: The mid-outer carbonate ramp of the Vaca muerta formation, Northern Neuqué Basin, Argentina |
| title_sort |
evidence of precessional and eccentricity orbital cycles in a tithonian source rock: the mid-outer carbonate ramp of the vaca muerta formation, northern neuqué basin, argentina |
| publishDate |
2011 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01491423_v95_n9_p1459_Kietzmann http://hdl.handle.net/20.500.12110/paper_01491423_v95_n9_p1459_Kietzmann |
| _version_ |
1768545641669066752 |