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The 1,550-m.y.-old Paraguaza granite of the northwestern Guayana Shield in Venezuela represents one of the larger, apparently anorogenic rapakivi intrusive rocks of the world. The Parguaza Granite outcrops in the Vichada department of Colombia, towards the Orinoco River margin, where it conforms a portion of the large batholith described in Venezuela as Granito de El... A combined gravimetric and geochronological interpretation of the Parguaza intrusion in the Guayana shield, southwestern Venezuela, indicates that there is a pattern of inverse cooling within this The Parguaza Granite outcrops in the Vichada department of Colombia, towards the Orinoco River margin, where it conforms a portion of the large batholith described in Venezuela as Granito de El Parguaza. This intrusion outcrops in Colombia as isolated inselberg hills and moderately extended mountain chains with abrupt slopes that protrude adshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A The Parguaza Granite outcrops in the Vichada department of Colombia, towards the Orinoco River margin, where it conforms a portion of the large batholith described in Venezuela as Granito de El Parguaza. This intrusion outcrops in Colombia as isolated inselberg hills and moderately extended mountain chains with abrupt slopes that protrude 2002-5-1 The Parguaza granite batholith covers an area in excess of 30,000 km 2 and, thus, belongs to the largest known Rapakivi-type intrusions (Rämö and Haapala, 1993). Radiometric dating by the Rb/Sr whole rock as well as U/Pb zircon methods yielded mid-Proterozoic ages of 1545±20 and 1532±39 Ma, respectively (Gaudette et al., 1978). The granite 2021-2-5 The most extensive anorogenic intrusive is the Middle Proterozoic Parguaza Rapakiwi Granite (Hackley et al., 2005). In Colombia, the Parguaza Granite exposures are limited to the left margin of the Orinoco River and isolated hills surrounded by recent deposits. Colombia, the Parguaza Granite exposures are limited to the left margin of the Orinoco River and isolated hills surrounded by recent deposits. Also, other Parguaza-like bodies were identi ed to Rapakivi granite is a member of the granite family, which comprises medium‐ to coarse‐grained igneous rocks containing quartz, feldspar and some darker minerals such as mica and amphibole.
Geology and age of the Parguaza rapakivi granite
Petrography, geochemistry and geochronology of
(PDF) Gravimetric modeling of the Parguaza granitic
PETROGRAPHY, GEOCHEMISTRY AND
Geology and age of the Parguaza rapakivi granite
PETROGRAFÍA, GEOQUÍMICA Y GEOCRONOLOGÍA
The geometry and anatomy of the Los Pijiguaos
Structural signatures of the Amazonian Craton in
(PDF) Structural signatures of the Amazonian Craton
Rapakivi granites Müller 2007 Geology Today