Petrology, geochemistry and U-Pb zircon and baddeleyite ages of the alkaline rocks from the central-southern Guyana Shield, northern Amazonian Craton
Sign Up to like & getrecommendations! Published in 2018 at "Journal of South American Earth Sciences"
DOI: 10.1016/j.jsames.2018.08.001
Abstract: Abstract The Apiau Alkaline Complex (AAC) represents a rift-related intracontinental magmatism and occurs as intrusions within the Precambrian basement of the central-southern portion of the Guyana Shield, Amazonian Craton. The complex extends for over 200 km… read more here.
Keywords: petrology; amazonian craton; zircon baddeleyite; geochemistry ... See more keywords
1U-Pb SIMS and Ar-Ar geochronology, petrography, mineralogy and gold mineralization of the late Mesozoic Amga alkaline rocks (Aldan shield, Russia)
Sign Up to like & getrecommendations! Published in 2019 at "Ore Geology Reviews"
DOI: 10.1016/j.oregeorev.2019.05.011
Abstract: Abstract Late Mesozoic Upper Amga alkaline rocks are located in the Amga tectonic melange zone within the Aldan-Stanovoy shield, Russia. The main phases of the Upper Amga complex consist of alkaline syenite intrusions as well… read more here.
Keywords: geochronology; late mesozoic; alkaline rocks; mineralogy ... See more keywords
Andradite–Morimotoite Garnets as Promising U–Pb Geochronometers for Dating Ultrabasic Alkaline Rocks
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DOI: 10.1134/s1028334x18060168
Abstract: U–Pb geochronological studies of garnet of the andradite–morimotoite series and Sm–Nd geochronological studies of this garnet and apatite from the Chikskii Massif (Tuva-Mongolia microcontinent) were carried out. The garnet studied is characterized by relatively high… read more here.
Keywords: geochronometers dating; andradite morimotoite; alkaline rocks; ultrabasic alkaline ... See more keywords