Significance of an Early Cretaceous Rb-Sr age in the Pescadero Pluton, Santander Massif

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Authors:Ordoñez, C. J.
Volume Title:Boletín de Geología
Source:Boletín de Geología, 26(43), p.115-126. Publisher: Universidad Industrial de Santander, Bucaramanga, Colombia. ISSN: 0120-0283
Publication Date:2004
Note:In English
Summary:A Rb-Sr whole rock-mineral age of 129 ± 8 Ma was yielded by the Pescadero Pluton. Stratigraphic relationships preclude an early Cretaceous age for this pluton. The occurrence of fluorite, quartz and calcite veins and a pervasive alteration at a mineral scale suggest that the Pescadero pluton has been affected by hydrothermal activity. The new age is interpreted as dating an early Cretaceous hydrothermal event recorded in the area. This event is not associated with the magmatic evolution of the pluton, but is temporarily related to the Santander Massif palaeo-topographic high, which separated the Tablazo-Magdalena and the Cocuy sedimentary basins. Key words: Rb-Sr Geochronology, Santander Massif, Pescadero Pluton, hydrothermal event. [C.A.G.R.]
Subsections:Analytical geochemistry; Igneous petrology
Subjects:Absolute age; Cretaceous; Dates; Hydrothermal alteration; Intrusions; Lower Cretaceous; Mesozoic; Metasomatism; Paleorelief; Plutons; Rb/Sr; Whole rock; Colombia; Santander Massif; South America; Pescadero Pluton
Abstract Numbers:05M/3751
Record ID:2016099702
Copyright Information:GeoRef, Copyright 2020 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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