The results from measured albitites from both mafic and tonalitic
magmatic precursors are in accordance with the original values from such protoliths  coupled with the influence of a fluid with both a magmatic and seawater origin .
Experimental partitioning of high field strength and rare earth elements between clinopyroxene and garnet in andesitic to tonalitic
to dioritic bodies (Mill Brook quartz diorite and related plutons) occur along the margins of these large plutons.
suite is exposed to the north and is strongly mylonitised and retrogressed along the fault boundary with formations from the Yaounde Group
Field evidence for this ancient crust is limited to a few remnants of supracrustal and plutonic rocks preserved in the Nuvvuagittuq belt and rare enclaves of tonalitic
A second orogeny in the Late Cretaceous culminated with the discordant intrusion of the tonalitic
(2009): Generation of tonalitic
and dioritic magmas by coupled partial melting of gabbroic and metasedimentary rocks within the deep crust of the Famantinian Magmatic Arc, Argentina.
The dioritic suite may be significantly older, based on its similarity to varied dioritic, tonalitic
, and granitic units dated at ca.
and Portella, P., 2003, U-Pb zircon and monazite geochronology of tonalitic
gneiss from Close Lake, Wollaston-Mudjatik Transition Zone, northern Saskatchewan [abstract], Vancouver 2003 (GAC-MAC-SEG meeting), abstract no.
The geologic history of this deposit begins with the intrusion of stocks of tonalitic
composition (the Andacollo porphyry, Upper Cretacous) within a layered sequence of andesite and dacites, which induced pervasive hydrothermal alteration (K silicate, quartz sericite) and mineralization (mainly pyrite-chalcopyrite plus some minor quantities of molybdenite, bornite, cubanite and pyrrhotite).