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Showing 1 to 3 of 3 for “"Emplacement ages"”.
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U-Pb geochronology of the Duluth Complex and related hypabyssal intrusions: investigating the emplacement history of a large multiphase intrusive complex related to the 1.1 Ga Midcontinent Rift.
… They did not, however, resolve differences in emplacement ages within and between major intrusive units due to a small number of dated samples. New high-precision U-Pb baddeleyite and zircon ages from five mafic intrusions related to the Duluth Complex builds on the work of Paces and Miller …
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Multidisciplinary investigations of the Chaman strike-slip fault along the western Indo-Asian collision boundary, Pakistan
… proximity of the Afghan block at the time of emplacement. U-Pb emplacement ages from granitic samples in the Khwaja Amran-Spinatizha area suggest that granitic intrusions within the Chagai-Ras Koh ceased by ~58 Ma as in the Kandahar arc. The fission track ages of ~35 Ma and ~20 Ma from the …
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Geology and petrogenesis of the Tuscarora Intrusion of the Duluth Complex, Gillis Lake 7.5’ quadrangle, northeastern Minnesota
… to have formed successively from major emplacement episodes of moderately evolved tholeiitic mafic magma. The emplacement model proposed has plagioclase porphyritic magmas intruding at some level above the base of the North Shore Volcanic Group to create the Anorthositic Series. This was …