Age and petrogenesis of the Sarmiento ophiolite complex of southern Chile

• Published in: Journal of South American Earth Sciences
• Main Authors: Stern, C. R., Mukasa, Samuel B., Fuenzalida P. , R.
• Other Authors: Department of Geological Sciences, University of Michigan, Ann Arbor, MI 48109-1063, USA, Department of Geological Sciences, University of Colorado, Boulder, CO 80309-0250, USA, Empresa Nacional del Petroleo, Casilla 11135, Santiago, Chile
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier 1992
• Subjects: Geology and Earth Sciences; Science; South Georgia Island; Rocas; Sarmiento
• Online Access: http://hdl.handle.net/2027.42/29957; http://www.sciencedirect.com/science/article/B6VDS-48B0P51-23/2/16d4ffe896c5a08829cd6a8953ec3e85; https://doi.org/10.1016/0895-9811(92)90020-Y

Zircon fractions separated from fine-grained plagiogranites, interpreted to be cogenetic with the mafic rocks of the Sarmiento ophiolite complex in southern Chile, yield slightly to grossly discordant age patterns for which the lower concordia intercept U-Pb ages of 140.7 +/- 0.7 Ma (Lolos Fjord) an...