Magnetostratigraphy and cyclostratigraphy of the Tithonian interval from the Vaca Muerta Formation, southern Neuquén Basin, Argentina

A cyclostratigraphic and paleomagnetic study was carried out in the lower part of the Vaca Muerta Formation, Los Catutos Member (Lower to lowermost Upper Tithonian) at the southern region of the Sierra de la Vaca Muerta, Neuquén Basin, west-central Argentina. The Vaca Muerta Formation is known for i...

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Detalles Bibliográficos
Publicado: 2018
Materias:
Cyclostratigraphy
Jurassic
Magnetostratigraphy
Tithonian
Vaca Muerta
ammonite
cyclostratigraphy
dating method
magnetization
magnetostratigraphy
paleomagnetism
remanent magnetization
source rock
stratigraphic correlation
Argentina
Neuquen Basin
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v85_n_p209_KohanMartinez
http://hdl.handle.net/20.500.12110/paper_08959811_v85_n_p209_KohanMartinez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_08959811_v85_n_p209_KohanMartinez
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spelling paper:paper_08959811_v85_n_p209_KohanMartinez2023-06-08T15:49:04Z Magnetostratigraphy and cyclostratigraphy of the Tithonian interval from the Vaca Muerta Formation, southern Neuquén Basin, Argentina Cyclostratigraphy Jurassic Magnetostratigraphy Tithonian Vaca Muerta ammonite cyclostratigraphy dating method magnetization magnetostratigraphy paleomagnetism remanent magnetization source rock stratigraphic correlation Tithonian Argentina Neuquen Basin A cyclostratigraphic and paleomagnetic study was carried out in the lower part of the Vaca Muerta Formation, Los Catutos Member (Lower to lowermost Upper Tithonian) at the southern region of the Sierra de la Vaca Muerta, Neuquén Basin, west-central Argentina. The Vaca Muerta Formation is known for its unconventional resource potential and its exceptional behaviour as a world-class source rock. The studied section is c. 90 m thick and is characterized by decimetre-scale rhythmic alternations of marls, mudstones and limestones, showing a well-ordered hierarchy of cycles. Elementary cycles, bundles and superbundles were recognized with frequencies within the Milankovitch spectrum band. A total of 280 standard specimens collected from 35 paleomagnetic sampling horizons, dated with ammonites, were analyzed. The quality and primary origin of the characteristic magnetization was proved through the corresponding reversal test. A magnetostratigraphic scale was thus constructed that comprises 5 reverse and 4 normal polarity intervals, spanning the Andean Virgatosphinctes andesensis (ex mendozanus) (Lower Tithonian) to Windhauseniceras internispinosum (lowermost Upper Tithonian) ammonite Zones. Polarities were correlated with the GPTS 2016 using the equivalences between the Andean and Standard ammonite zones which, allowed to interpret that Los Catutos section was deposited between M22r to M20n Subchrons. By means of the correlation between the cyclostratigraphic and magnetostratigraphic scales, it was possible to date the Tithonian succession with unprecedented precision. Rock magnetic studies indicate that the remanence is carried by titanomagnetite. © 2018 Elsevier Ltd 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v85_n_p209_KohanMartinez http://hdl.handle.net/20.500.12110/paper_08959811_v85_n_p209_KohanMartinez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Cyclostratigraphy
Jurassic
Magnetostratigraphy
Tithonian
Vaca Muerta
ammonite
cyclostratigraphy
dating method
magnetization
magnetostratigraphy
paleomagnetism
remanent magnetization
source rock
stratigraphic correlation
Tithonian
Argentina
Neuquen Basin
spellingShingle Cyclostratigraphy
Jurassic
Magnetostratigraphy
Tithonian
Vaca Muerta
ammonite
cyclostratigraphy
dating method
magnetization
magnetostratigraphy
paleomagnetism
remanent magnetization
source rock
stratigraphic correlation
Tithonian
Argentina
Neuquen Basin
Magnetostratigraphy and cyclostratigraphy of the Tithonian interval from the Vaca Muerta Formation, southern Neuquén Basin, Argentina
topic_facet Cyclostratigraphy
Jurassic
Magnetostratigraphy
Tithonian
Vaca Muerta
ammonite
cyclostratigraphy
dating method
magnetization
magnetostratigraphy
paleomagnetism
remanent magnetization
source rock
stratigraphic correlation
Tithonian
Argentina
Neuquen Basin
description A cyclostratigraphic and paleomagnetic study was carried out in the lower part of the Vaca Muerta Formation, Los Catutos Member (Lower to lowermost Upper Tithonian) at the southern region of the Sierra de la Vaca Muerta, Neuquén Basin, west-central Argentina. The Vaca Muerta Formation is known for its unconventional resource potential and its exceptional behaviour as a world-class source rock. The studied section is c. 90 m thick and is characterized by decimetre-scale rhythmic alternations of marls, mudstones and limestones, showing a well-ordered hierarchy of cycles. Elementary cycles, bundles and superbundles were recognized with frequencies within the Milankovitch spectrum band. A total of 280 standard specimens collected from 35 paleomagnetic sampling horizons, dated with ammonites, were analyzed. The quality and primary origin of the characteristic magnetization was proved through the corresponding reversal test. A magnetostratigraphic scale was thus constructed that comprises 5 reverse and 4 normal polarity intervals, spanning the Andean Virgatosphinctes andesensis (ex mendozanus) (Lower Tithonian) to Windhauseniceras internispinosum (lowermost Upper Tithonian) ammonite Zones. Polarities were correlated with the GPTS 2016 using the equivalences between the Andean and Standard ammonite zones which, allowed to interpret that Los Catutos section was deposited between M22r to M20n Subchrons. By means of the correlation between the cyclostratigraphic and magnetostratigraphic scales, it was possible to date the Tithonian succession with unprecedented precision. Rock magnetic studies indicate that the remanence is carried by titanomagnetite. © 2018 Elsevier Ltd
title Magnetostratigraphy and cyclostratigraphy of the Tithonian interval from the Vaca Muerta Formation, southern Neuquén Basin, Argentina
title_short Magnetostratigraphy and cyclostratigraphy of the Tithonian interval from the Vaca Muerta Formation, southern Neuquén Basin, Argentina
title_full Magnetostratigraphy and cyclostratigraphy of the Tithonian interval from the Vaca Muerta Formation, southern Neuquén Basin, Argentina
title_fullStr Magnetostratigraphy and cyclostratigraphy of the Tithonian interval from the Vaca Muerta Formation, southern Neuquén Basin, Argentina
title_full_unstemmed Magnetostratigraphy and cyclostratigraphy of the Tithonian interval from the Vaca Muerta Formation, southern Neuquén Basin, Argentina
title_sort magnetostratigraphy and cyclostratigraphy of the tithonian interval from the vaca muerta formation, southern neuquén basin, argentina
publishDate 2018
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08959811_v85_n_p209_KohanMartinez
http://hdl.handle.net/20.500.12110/paper_08959811_v85_n_p209_KohanMartinez
_version_ 1768542370325856256

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