Base metal mobility linked to brine and hydrocarbon migration at the Huincul High in the Neuquén Basin, Argentina: Implications for the formation of sediment-hosted base metal deposits
| Autor: | Nora Noemi Cesaretti, Aldo O. Montagna, Ana L. Rainoldi, Adolfo Giusiano, Marta Franchini, M. Josefina Pons, Richard Herrington |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Supergene (geology)
Zinc and Lead Mineralizations Los Molles Formation Geochemistry 010501 environmental sciences engineering.material 010502 geochemistry & geophysics 01 natural sciences Sediment Hosted Copper Diagenesis δ34S Geochemistry and Petrology Tectonic Evolution engineering Meteoric water Marcasite Economic Geology Siliciclastic Pyrite Ciencias Exactas y Naturales Basin Architecture Geology 0105 earth and related environmental sciences |
| Zdroj: | RID-UNRN (UNRN) Universidad Nacional de Río Negro instacron:UNRN |
| ISSN: | 0375-6742 |
| DOI: | 10.1016/j.gexplo.2021.106778 |
| Popis: | Fil: Pons, Josefina. Universidad Nacional de Río Negro. Instituto de Investigación en Paleobiología y Geología. Río Negro, Argentina. Fil: Franchini, Marta. Consejo Nacional de Investigaciones Científicas y Técnicas, Centro Patagónico de Estudios Metalogenéticos. Universidad Nacional del Comahue, Facultad de Ingeniería, Departamento de Geología y Petróleo. Argentina. Fil: Rainoldi, Ana. Consejo Nacional de Investigaciones Científicas y Técnicas, Centro Patagónico de Estudios Metalogenéticos. Dpto. de Geología, Universidad Nacional del Sur (UNS). Argentina. Fil: Giusiano, Adolfo. Consultant Geologist. Argentina. Fil: Cesaretti, Nora. Dpto. de Geología, Universidad Nacional del Sur (UNS). CGAMA (CIC-UNS). Argentina. Fil: Montagna, Aldo. Universidad Nacional de Río Negro. YPF, S.A. Argentina. Fil: Herrington, Richard. Department of Earth Sciences, Natural History Museum. United Kingdom. This contribution discusses the discovery of Pb–Zn mineralization in hydrocarbon exploration drill holes hosted in siliciclastic Jurassic rocks below the Cretaceous sediment hosted Cu mineralization located north of the Huincul High. In the Early Cretaceous, hydrocarbon and basinal water expulsion took place from the oil source rocks (Los Molles Formation) into the reservoir rocks Lajas Formation (Middle Jurassic), after the formation of diagenetic quartz overgrowths. Marcasite, pyrite and illite + illite-smectite mixed layer minerals then formed together with hydrocarbons. Marcasite (δ34S − 3.5 and − 2.2‰) and pyrite (δ34S − 11.6 to 18.1‰) precipitated via bacterial sulfate reduction from fluids showing temperatures 100 ◦C close to the feeder zones at the expense of barite as a local sulfur source. Chalcocite group minerals (δ34S − 21.3‰ to − 7.3‰) precipitated outwards in pore spaces of the sandstones at lower temperatures ( |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect