Alcock et al.
 Geological Materials Research
 v.1, n.4
Three-dimensional model of heat flow in the aureole of the Marcy anorthosite, Adirondack Highlands, New York: Implications for depth of emplacement

J. Alcock1, Kevin Myer2, and P. D. Muller3

1Penn State, Abington, Abington, PA, 19001 <>
2Penn State, University Park, PA, 16802 *
3SUNY Oneonta, Oneonta, NY, 13820, <>
(Received April 1, 1999; Published September 22, 1999)


The New Russia gneiss complex occurs within a broad, very high temperature (800-950 °C)
metamorphic aureole against the eastern margin of the Marcy anorthosite, northeastern
Adirondack Highlands of New York. Three-dimensional models of heat flow from the anorthosite indicate that an aureole like that preserved in the New Russia gneisses would form if the country rock were at high temperature (> 700 °C) and at depth prior to intrusion. These findings are consistent with geobarometric evidence indicating that partial melting in the aureole occurred at 700-1000 MPa and support the hypothesis that the anorthosite intruded at a depth of 25 to 35 km.

Keywords: Marcy anorthosite, Adirondack Highlands, contact metamorphism, conductive heating, finite-difference models.

* Current Address: University of Washington, Seattle, WA 98105

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Copyright ©1999 by the Mineralogical Society of America