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Administrator   /   Martes 26 de Noviembre de 2019 14:46

TEMA L2-3 The interplay between long-term, large-scale landscape evolution and the formation of late Cenozoic supergene copper mineralization

Dr. Rodrigo RIQUELME
Laboratorio Mixto Internacional Cobre y Pedimento - IRD-COPEDIM
Universidad Cat?lica del Norte
https://copedim.obs-mip.fr

COPEDIM is an international research group focusing on the development of geological erosion surfaces (pediments) in the Andes and on associated supergene concentration of some metals like copper by weathering processes. Its objectives are improving knowledge of fundamental processes and training students and professionals about the geomorphological control of supergene copper enrichment.

How and when did erosion and weathering surfaces develop in mountain ranges is a crucial issue to reconstruct climatic and tectonic changes through geological times. Understanding the paleo-environmental conditions required to concentrate copper is fundamental to improve prospection models, in particular below gravel. Our goal is to understand and quantify the optimum paleo- uplift, erosion and climate conditions leading to supergene copper enrichment.

We carry out researches based on field works, mostly in northern Chile and southern Per?, innovative datings of copper bearing minerals, thermochronology to reconstruct the exhumation history of ore deposits, new applications of cosmogenic nuclides to date exotic deposits and to characterize their paleoenvironment, magnetic and geochemical signatures of exotic copper bearing sediment, and we develop numerical and experimental models to study landscape evolution and weathering.

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Ultimas Publicaciones

Rech, J., Currie, B.S., Jordan, T.E., Riquelme, R., Lehmann, S. B., Kirk-Lawlor, N.E., Li, S., and Gooley., J., 2019, Massive Middle Miocene gypsic paleosols in the Atacama Desert and the formation of the Central Andean rainshadow: Earth and Planetary Sciences Letters, v. 506, p. 184-194. https://doi.org/10.1016/j.epsl.2018.10.040

Espinoza, M.; ?Montecinos, ?D.; ?Oliveros, ?V.; ?Astudillo, ?N.; ?Vasquez, ?P.; ?Reyes, ?R.; ?Celis, C.; Gonz?lez, ?R.; Contreras, ?J. ?F.; ?Creixell, ?C.; ?Martinez, ?A. ?(2018). ?The synrift phase ?of ?the ?early ?Domeyko ?Basin ?(Triassic, ?northern ?Chile): ?Sedimentary, ?volcanic and ?tectonic ?interplay ?in ?the ?evolution ?of ?an ?ancient ?subduction-related ?rift ?basin. Basin Research. (4,147) DOI: 10.1111/bre.12305

Riquelme R., Tapia M., Campos E., Mpodozis C., Carretier S., Gonz?lez R., Mu?oz S., Fernandez-Mort A., Sanchez, C., Marquardt C. (2018) Supergene and exotic Cu mineralization occurs during periods of landscape stability in the Centinela Mining District, Atacama Desert. Basin Research 30, Issue3, p. 395-425. DOI:10.1111/bre.12258 (4,147)

Demergasso C, V?liz R, Galleguillos P, Mar?n s, Acosta M, Zepeda V, Zeballos J, Henr?quez F, Pizarro R, Bekios-Calfa J (2018). Decision support system for bioleaching processes. Hydrometallurgy 181: 113-122. DOI: 10.1016/j.hydromet.2018.08.009.

Galleguillos P, Grail BM, Hallberg KB, Johnson DB, Demergasso C (2018). Identification of trehalose as a compatible solute in different species of acidophilic bacteria. Journal of Microbiology 56(10):727-733. DOI: 10.1007/s12275-018-8176-2

Tapia, J.; Gonz?lez, ?R.; ?Townley, ?B.; ?Oliveros, ?V.; ??lvarez, ?F.; ?Aguilar, ?G.; ?Menzies, ?A.; Calder?n, ?M. ?2018. ?Geology and ?geochemistry ?of ?the ?Atacama ?Desert. ?In Microbiology of ?the ?Atacama ?Desert ?(B. ?Andrews, A. ?T. ?Bull, C. ?Dorador and M. Goodfellows, Eds). ?Antonie van Leeuwenhoek (special issue). https://doi.org/10.1007/s10482-018-1024-x (1,795)

Escudero, L., Oetiker, N., Gallardo, K., Tebes-Cayo, C., Guajardo, M., Nu?ez, C., Davis-Belmar, C., Pueyo, J. J., Chong-D?az G., and Demergasso, C. (2018). A thiotrophic microbial community in an acidic brine lake in Northern Chile. Antonie van Leeuwenhoek. doi.org/10.1007/s10482-018-1087-8.

Fern?ndez-Mort, A., Riquelme, R., Alonso-Zarza, A., Campos, E., Bissig, T., Mpodozis, C., Carretier, S., Herrera, C., Tapia, M., Pizarro, H., and Mu?oz, S. (2017). A genetic model based on evapoconcentration for sediment-hosted exotic-Cu mineralization in arid environments: the case of the El Tesoro Central copper deposit, Atacama Desert, Chile. Mineralium Deposita. https://doi.org/10.1007/s00126-017-0780-2

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