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New K-Ar ages of altered rocks from Paramillos Sur and Norte: Interpretation of the results; Nuevas edades K-Ar de las rocas alteradas de Paramillos Sur y Norte: Interpretacion de los resultados

Abstract

The whole-rock K-Ar dates from porphyry copper prospects of Paramillos Sur (phyllic and potasic alteration zones) and Paramillos Norte (propilitic zone) are reported. Radiometric data yielded 17,8 {+-} 0,9 Ma, 15,8 {+-} 1,0 Ma and 15,2 {+-} 0,5 Ma in Paramillos Sur, and 17,3 {+-} 0,7 Ma in Paramillos Norte, which can be added to an previously reported age of 16,4 {+-} 0,3 Ma. These data are in agreement with isotopic ages from non altered or non mineralized magmatic rocks of the region. When the isotopic ages and petrographic characteristics of the dated rocks are considered, two alteration-mineralization events are suggested for Paramillos Sur prospect. However this possibility needs to be confirmed by means of future studies, in view of the reduced interval between these events when compared with the analytical errors. (author)
Authors:
Koukharsky, Magdalena; Brodtkorb, Alejo; [1]  Munizaga, Francisco [2] 
  1. Buenos Aires Univ. (Argentina). Facultad de Ciencias Exactas y Naturales
  2. Chile Univ., Santiago (Chile). Dept. de Geologia
Publication Date:
Jul 01, 1998
Product Type:
Conference
Report Number:
INIS-AR-C-029
Reference Number:
EDB-01:031243
Resource Relation:
Conference: 10. Latin American Congress of Geology; 6. National Congress of Economic Geology, 10. Congreso Latinoamericano de Geologia; 6. Congreso Nacional de Geologia Economica, Buenos Aires (Argentina), 8-13 Nov 1998; Other Information: 15 refs., 1 fig., 2 tabs; PBD: 1998
Subject:
58 GEOSCIENCES; ARGENTINA; ISOTOPE DATING; RADIOMETRIC ANALYSIS
OSTI ID:
20146842
Research Organizations:
Asociacion Argentina de Geologos Economistas, Buenos Aires (Argentina)
Country of Origin:
Argentina
Language:
Spanish
Other Identifying Numbers:
TRN: AR00C0037012690
Availability:
Available from INIS in electronic form
Submitting Site:
INIS
Size:
(v.3) 6 pages
Announcement Date:

Citation Formats

Koukharsky, Magdalena, Brodtkorb, Alejo, and Munizaga, Francisco. New K-Ar ages of altered rocks from Paramillos Sur and Norte: Interpretation of the results; Nuevas edades K-Ar de las rocas alteradas de Paramillos Sur y Norte: Interpretacion de los resultados. Argentina: N. p., 1998. Web.
Koukharsky, Magdalena, Brodtkorb, Alejo, & Munizaga, Francisco. New K-Ar ages of altered rocks from Paramillos Sur and Norte: Interpretation of the results; Nuevas edades K-Ar de las rocas alteradas de Paramillos Sur y Norte: Interpretacion de los resultados. Argentina.
Koukharsky, Magdalena, Brodtkorb, Alejo, and Munizaga, Francisco. 1998. "New K-Ar ages of altered rocks from Paramillos Sur and Norte: Interpretation of the results; Nuevas edades K-Ar de las rocas alteradas de Paramillos Sur y Norte: Interpretacion de los resultados." Argentina.
@misc{etde_20146842,
title = {New K-Ar ages of altered rocks from Paramillos Sur and Norte: Interpretation of the results; Nuevas edades K-Ar de las rocas alteradas de Paramillos Sur y Norte: Interpretacion de los resultados}
author = {Koukharsky, Magdalena, Brodtkorb, Alejo, and Munizaga, Francisco}
abstractNote = {The whole-rock K-Ar dates from porphyry copper prospects of Paramillos Sur (phyllic and potasic alteration zones) and Paramillos Norte (propilitic zone) are reported. Radiometric data yielded 17,8 {+-} 0,9 Ma, 15,8 {+-} 1,0 Ma and 15,2 {+-} 0,5 Ma in Paramillos Sur, and 17,3 {+-} 0,7 Ma in Paramillos Norte, which can be added to an previously reported age of 16,4 {+-} 0,3 Ma. These data are in agreement with isotopic ages from non altered or non mineralized magmatic rocks of the region. When the isotopic ages and petrographic characteristics of the dated rocks are considered, two alteration-mineralization events are suggested for Paramillos Sur prospect. However this possibility needs to be confirmed by means of future studies, in view of the reduced interval between these events when compared with the analytical errors. (author)}
place = {Argentina}
year = {1998}
month = {Jul}
}