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Keywords: alkali
Laurentia
2
Mesoproterozoic
2
Nd isotopes
2
North America
2
Proterozoic
2
U-Pb ages
2
age determination
2
architecture
2
article
2
chemical composition
2
chronol Granite
2
gallium
2
geochemistry
2
geochronology
2
granite
2
isotope
2
lead
2
neodymium
2
neodymium isotope
2
petrography
2
rhyolite
2
silicon dioxide
2
uranium
2
zirconium
2
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