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Age, Sr and Nd-Isotope Systematics, and Origin of Two Fluorite Lodes, Sierras Pampeanas, Argentina

Galindo Francisco, Mª del Carmen and Pankhurst, R.J. and Casquet, César and Coniglio, Jorge and Baldo, Edgardo G. and Rapela, Carlos W. and Saavedra, Julio (1997) Age, Sr and Nd-Isotope Systematics, and Origin of Two Fluorite Lodes, Sierras Pampeanas, Argentina. International geology review, 39 (10). pp. 948-954. ISSN 0020-6814

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Abstract

Fluorite mineralization at the La Nueva and Bubu mines yields Sm-Nd ages of 131 ± 22 and 117 ± 26 Ma, respectively. Thus, the mineralization most probably is related to a late Gondwanian (Lower Cretaceous) extensional and magmatic event that affected the Sierras Pampeanas basement during the opening of the Atlantic Ocean. Hydrothermal fluids involved in the formation of the fluorite probably were of meteoric origin, their isotopic composition (Sr and Nd) resulting largely from the incongruent dissolution of feldspars in the host porphyritic granites.


Item Type:Article
Uncontrolled Keywords:Fluorite mineralization; Sierra Pampeana; Argentina
Subjects:Sciences > Geology > Geochemistry
ID Code:12104
Deposited On:31 Jan 2011 09:58
Last Modified:31 Jan 2011 09:58

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