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For permission to copy, contact editing@geosociety.org 2007 Geological Society of America
 

Summary: For permission to copy, contact editing@geosociety.org
2007 Geological Society of America
ABSTRACT
New U-Pb zircon ages, geochemistry, and
Nd isotopic data are presented from three
localities in the Paleoproterozoic Mazatzal
province of southern New Mexico, United
States. These data help in understanding the
source regions and tectonic setting of magma-
tism from 1680 to 1620 Ma, the timing of the
Mazatzal orogeny, the nature of postorogenic
magmatism, Proterozoic plate tectonics, and
provide a link between Mazatzal subblocks
in Arizona and northern New Mexico. The
data indicate a period from 1680 to 1650 Ma
in which juvenile felsic granitoids were
formed, and a later event between 1646 and
1633 Ma, when these rocks were deformed
together with sedimentary rocks. No evidence
of pre-1680 Ma rocks or inherited zircons

  

Source: Amato, Jeff - Department of Geological Sciences, New Mexico State University

 

Collections: Geosciences