Adirondack anorthosite contact zones

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Journal Article
Published: 01 October 1950
American Mineralogist (1950) 35 (9-10): 659–670.
...A. F. Buddington Abstract The genesis of some pyroxenes and garnets related to Adirondack anorthosite, anortho-site-marble contact zones and their metamorphic equivalent are discussed on the basis of 10 clinopyroxenes whose chemical analyses as related to optical properties have recently been...
Series: GSA Memoirs
Published: 01 January 1939
DOI: 10.1130/MEM7-p1
... at the base of the Tupper-Saranac complex, adjacent to the anorthosite massif and locally in each of the other bodies, however, is interpreted as in part the product of modification and assimilation in contact zones between quartz syenitic magmas and metagabbro or mafic Grenville skarn. The syenitic sheets...
Journal Article
Journal: GSA Bulletin
Published: 01 September 1953
GSA Bulletin (1953) 64 (9): 1013–1048.
... of the Grenville series is moderately to highly deformed, and injected. In the Adirondacks and in parts of Ontario and Quebec, the anorthosites appear to be the oldest rocks intrusive into the Grenville series, followed successively by gabbros, diorites, syenites, and a granitic complex. In some parts of western...
Journal Article
Journal: Geosphere
Published: 01 February 2011
Geosphere (2011) 7 (1): 2–22.
... mafic to intermediate rocks are involved; primary relationships and textures in more ductile granitic rocks are rarely preserved intact. An ∼10-m-wide, near vertical contact zone is exposed on the southern flank of Chimney Mountain in the Central Adirondacks ( Figs. 2 and 3 ), external...
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Journal Article
Journal: GSA Bulletin
Published: 01 February 1980
GSA Bulletin (1980) 91 (2_Part_II): 659–684.
...Lewis D. Ashwal; Karl E. Seifert Abstract INTRODUCTION Massif-type anorthosite complexes, typified by the Adirondack Mardy massif (Fig. 1) consist predominantly of large masses of pure or nearly pure plagioclase rocks (>90% An 40–65 ), with minor facies containing larger proportions of mafic...
Journal Article
Journal: GSA Bulletin
Published: 01 February 1980
GSA Bulletin (1980) 91 (2): 78–88.
... are still well preserved. The garnet-pyroxene gneiss is characterized by the metamorphic assemblage plagioclase + garnet + clinopyroxene and by the presence of blue plagioclase mega-crysts. The gneiss forms intrusive sill-like bodies, usually in contact with anorthosite. In some places, the contact...
Journal Article
Published: 01 May 2001
Canadian Journal of Earth Sciences (2005) 42 (10): 1949–1965.
... documented in graphite crystals from marbles in proximity to anorthosite in the Adirondack Highlands ( Kitchen and Valley 1995 ). This zoning is consistent with the interpretation that early graphite grown during contact metamorphism is rimmed by graphite grown during the subsequent granulite-facies Ottawan...
FIGURES | View All (11)
Journal Article
Published: 01 April 2007
American Mineralogist (2007) 92 (4): 453–459.
...G. Desbois; J. Ingrin; N.T. Kita; J.W. Valley; E. Deloule Abstract Detailed electron- and ion-microprobe analysis of diopsides extracted from a block of marble collected in the Mt. Marcy anorthosite massif (Adirondack Highlands, New York) shows that single crystals have preserved Al-Si zoning...
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Published: 06 October 2006
DOI: 10.1130/2006.fld008(06)
EISBN: 9780813756080
... consisting of massifs of Mesoproterozoic gneiss overlain unconformably by Paleozoic metasediments. To the north of the Martic Line, the Mesoproterozoic gneisses are lithologically similar to rocks of the Adirondack anorthosite-mangerite-charnockite-granite (AMCG) association, and also include amphibolite...
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Journal Article
Published: 14 March 2001
Canadian Journal of Earth Sciences (2001) 38 (3): 465–470.
... by them to contact effects of the Marcy anorthosite. Doubly terminated, oscillatory zoned, and core-free igneous zircons from the leucosomes yield an age of 1040 ± 1 Ma, which dates the time of anatexis. This age is 90 Ma younger than the Marcy anorthosite and corresponds to granulite-facies metamorphism...
Journal Article
Journal: Geosphere
Published: 01 April 2016
Geosphere (2016) 12 (2): 572–584.
... felsic magma (charnockite-mangerite?) that intruded into a partially crystallized zone of anorthositic, gabbroic, and dioritic rock. This resulted in disruption, partial mixing and hybridization, and chilling of mafic magma within, and against, the more silicic melts. CORRESPONDENCE: jchiaren...
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