Hydrocarbon-bearing sulphate-polymetallic deposits at the Colipilli area, Neuquén Basin, Argentina: Implications in the petroleum system modeling

This work deals with the hydrocarbon-bearing barite-polymetallic mineralizations of the Colipilli area, located in the western sector of the Agrio Fold and Thrust Belt (Neuqu´en Basin, Argentina). The mineralizations consist of bed- and vein-type deposits mainly composed of barite (barite96.99%–cele...

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Autores principales: Salvioli, Melisa Ariana, Ballivián Justiniano, Carlos Alberto, Lajoinie, María Florencia, De la Cal, H. G., Ruiz, Remigio, Cesaretti, Nora N., Lanfranchini, Mabel Elena
Formato: Articulo
Lenguaje:Inglés
Publicado: 2021
Materias:
Geología
Barite-polymetallic mineralizations
Fluid inclusions
Hydrothermal fluids
Hydrocarbons
Thermal anomaly
Atypical petroleum system
Lower cretaceous
Agrio fold and thrust belt
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/159632
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-159632
record_format dspace
spelling I19-R120-10915-1596322023-10-31T20:08:30Z http://sedici.unlp.edu.ar/handle/10915/159632 Hydrocarbon-bearing sulphate-polymetallic deposits at the Colipilli area, Neuquén Basin, Argentina: Implications in the petroleum system modeling Salvioli, Melisa Ariana Ballivián Justiniano, Carlos Alberto Lajoinie, María Florencia De la Cal, H. G. Ruiz, Remigio Cesaretti, Nora N. Lanfranchini, Mabel Elena 2021-01-21 2023-10-31T17:11:09Z en Geología Barite-polymetallic mineralizations Fluid inclusions Hydrothermal fluids Hydrocarbons Thermal anomaly Atypical petroleum system Lower cretaceous Agrio fold and thrust belt This work deals with the hydrocarbon-bearing barite-polymetallic mineralizations of the Colipilli area, located in the western sector of the Agrio Fold and Thrust Belt (Neuqu´en Basin, Argentina). The mineralizations consist of bed- and vein-type deposits mainly composed of barite (barite96.99%–celestine2.93%) with minor amounts of Feoxyhydroxides and sulfides. The bed-type deposits have zebra texture and are emplaced along the contact between Late Cretaceous–Paleocene igneous rocks (Naunauco Group) and their Early Cretaceous sedimentary host rocks (e.g., Huitrín Formation). In contrast, the vein-type deposits have breccia texture and are crosscutting the Mulichinco, Agrio and Huitrín formations or the andesitic/dioritic stocks and sills of the Naunauco Group. Different types and families of primary fluid inclusions (FI) were identified in the barite crystals. Fluorescence techniques with UV incident light and Raman spectroscopy allowed FI from completely aqueous to completely organic, including all the intermediate terms, to be identified. The organic FI have blue fluorescence and contain liquid hydrocarbons. The blue fluorescence is correlated with medium to high API gravity values (ca. 40◦), indicating the presence of light hydrocarbons of advanced maturity related with the window for the generation of liquid/gaseous hydrocarbons. Microthermometry studies carried out on aqueous FI revealed that vein-type deposits formed at higher temperatures and salinities (249.7 ◦C and 0.5–9.3 wt % NaCl equivalent) than bed-type deposits (162.2 ◦C and 0.2–7.2 wt % NaCl equivalent). The heat influx provided by the Late Cretaceous– Paleocene magmatism promoted the circulation of inorganic and organic fluids of connate origin and the leaching of metallic and non-metallic elements from the sedimentary pile. During its crystallization, barite trapped fluids with variable hydrocarbon contents. The thermal anomaly associated with the magmatic activity could also have contributed with the maturation of the nearby source rocks and to the development of an atypical petroleum system. Instituto de Recursos Minerales Articulo Articulo http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) application/pdf
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geología
Barite-polymetallic mineralizations
Fluid inclusions
Hydrothermal fluids
Hydrocarbons
Thermal anomaly
Atypical petroleum system
Lower cretaceous
Agrio fold and thrust belt
spellingShingle Geología
Barite-polymetallic mineralizations
Fluid inclusions
Hydrothermal fluids
Hydrocarbons
Thermal anomaly
Atypical petroleum system
Lower cretaceous
Agrio fold and thrust belt
Salvioli, Melisa Ariana
Ballivián Justiniano, Carlos Alberto
Lajoinie, María Florencia
De la Cal, H. G.
Ruiz, Remigio
Cesaretti, Nora N.
Lanfranchini, Mabel Elena
Hydrocarbon-bearing sulphate-polymetallic deposits at the Colipilli area, Neuquén Basin, Argentina: Implications in the petroleum system modeling
topic_facet Geología
Barite-polymetallic mineralizations
Fluid inclusions
Hydrothermal fluids
Hydrocarbons
Thermal anomaly
Atypical petroleum system
Lower cretaceous
Agrio fold and thrust belt
description This work deals with the hydrocarbon-bearing barite-polymetallic mineralizations of the Colipilli area, located in the western sector of the Agrio Fold and Thrust Belt (Neuqu´en Basin, Argentina). The mineralizations consist of bed- and vein-type deposits mainly composed of barite (barite96.99%–celestine2.93%) with minor amounts of Feoxyhydroxides and sulfides. The bed-type deposits have zebra texture and are emplaced along the contact between Late Cretaceous–Paleocene igneous rocks (Naunauco Group) and their Early Cretaceous sedimentary host rocks (e.g., Huitrín Formation). In contrast, the vein-type deposits have breccia texture and are crosscutting the Mulichinco, Agrio and Huitrín formations or the andesitic/dioritic stocks and sills of the Naunauco Group. Different types and families of primary fluid inclusions (FI) were identified in the barite crystals. Fluorescence techniques with UV incident light and Raman spectroscopy allowed FI from completely aqueous to completely organic, including all the intermediate terms, to be identified. The organic FI have blue fluorescence and contain liquid hydrocarbons. The blue fluorescence is correlated with medium to high API gravity values (ca. 40◦), indicating the presence of light hydrocarbons of advanced maturity related with the window for the generation of liquid/gaseous hydrocarbons. Microthermometry studies carried out on aqueous FI revealed that vein-type deposits formed at higher temperatures and salinities (249.7 ◦C and 0.5–9.3 wt % NaCl equivalent) than bed-type deposits (162.2 ◦C and 0.2–7.2 wt % NaCl equivalent). The heat influx provided by the Late Cretaceous– Paleocene magmatism promoted the circulation of inorganic and organic fluids of connate origin and the leaching of metallic and non-metallic elements from the sedimentary pile. During its crystallization, barite trapped fluids with variable hydrocarbon contents. The thermal anomaly associated with the magmatic activity could also have contributed with the maturation of the nearby source rocks and to the development of an atypical petroleum system.
format Articulo
Articulo
author Salvioli, Melisa Ariana
Ballivián Justiniano, Carlos Alberto
Lajoinie, María Florencia
De la Cal, H. G.
Ruiz, Remigio
Cesaretti, Nora N.
Lanfranchini, Mabel Elena
author_facet Salvioli, Melisa Ariana
Ballivián Justiniano, Carlos Alberto
Lajoinie, María Florencia
De la Cal, H. G.
Ruiz, Remigio
Cesaretti, Nora N.
Lanfranchini, Mabel Elena
author_sort Salvioli, Melisa Ariana
title Hydrocarbon-bearing sulphate-polymetallic deposits at the Colipilli area, Neuquén Basin, Argentina: Implications in the petroleum system modeling
title_short Hydrocarbon-bearing sulphate-polymetallic deposits at the Colipilli area, Neuquén Basin, Argentina: Implications in the petroleum system modeling
title_full Hydrocarbon-bearing sulphate-polymetallic deposits at the Colipilli area, Neuquén Basin, Argentina: Implications in the petroleum system modeling
title_fullStr Hydrocarbon-bearing sulphate-polymetallic deposits at the Colipilli area, Neuquén Basin, Argentina: Implications in the petroleum system modeling
title_full_unstemmed Hydrocarbon-bearing sulphate-polymetallic deposits at the Colipilli area, Neuquén Basin, Argentina: Implications in the petroleum system modeling
title_sort hydrocarbon-bearing sulphate-polymetallic deposits at the colipilli area, neuquén basin, argentina: implications in the petroleum system modeling
publishDate 2021
url http://sedici.unlp.edu.ar/handle/10915/159632
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