eCite Digital Repository

Zircon U–Pb geochronology of granitic rocks of the Cordón de Lila and Sierra de Almeida ranges, northern Chile: 30 m.y. of Ordovician plutonism on the western border of Gondwana

Citation

Niemeyer, H and Meffre, S and Guerrero, R, Zircon U-Pb geochronology of granitic rocks of the Cordon de Lila and Sierra de Almeida ranges, northern Chile: 30 m.y. of Ordovician plutonism on the western border of Gondwana, Journal of South American Earth Sciences, 56 pp. 228-241. ISSN 0895-9811 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 Elsevier Ltd.

DOI: doi:10.1016/j.jsames.2014.09.011

Abstract

In this paper we determined the chronology of Lower Paleozoic arc-related granitic rocks in the Cordón de Lila and Sierra de Almeida ranges, northern Chile, based on new U–Pb ages obtained by Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS) on single zircons. Plutonism lasted ∼30 m.y., spanning from 490 to 460 Ma (Lower to Mid Ordovician). The obtained ages correspond to the plutonic units' crystallization ages and fit well with the observed contact relationships with their country rocks and mutual intrusion relationships, and also with biostratigraphical data from the sedimentary country rocks. Our geochronological results on the granitic rocks of Cordón de Lila and Sierra de Almeida ranges broadly agree with the known ages of the plutonic rocks in the Argentinian Puna, strengthening the idea that they formed part of the same magmatic arc in the western border of west Gondwana during the Early to Middle Ordovician.

Item Details

Item Type:Refereed Article
Keywords:Chile, plutonic rocks, Ordovician magmatic arc, Northern Chilean Andes
Research Division:Earth Sciences
Research Group:Geology
Research Field:Tectonics
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:Meffre, S (Dr Sebastien Meffre)
ID Code:98098
Year Published:2014
Funding Support:Australian Research Council (CE0561595)
Web of Science® Times Cited:1
Deposited By:Centre for Ore Deposit Research - CODES CoE
Deposited On:2015-02-02
Last Modified:2017-11-02
Downloads:0

Repository Staff Only: item control page