Research Paper GEOSPHERE Syn-collisional exhumation of hot middle crust in the Adirondack Mountains (New York, USA): Implications for extensional orogenesis GEOSPHERE, v. 15, no. 4 in the southern Grenville province 1,2 2 3 4 3 5 https://doi.org/10.1130/GES02029.1 S.P. Regan , G.J. Walsh , M.L. Williams , J.R. Chiarenzelli , M. Toft , and R. McAleer 1Department of Geoscience, University of Alaska Fairbanks, Fairbanks, Alaska 99775, USA 11 figures; 3 tables 2U.S. Geological Survey, Florence Bascom Geoscience Center, Montpelier, Vermont 05601, USA 3Department of Earth and Sustainability, University of Massachusetts Amherst, Amherst, Massachusetts 01003, USA 4Department of Geology, St. Lawrence University, Canton, New York 13617, USA CORRESPONDENCE:
[email protected] 5U.S. Geological Survey, Florence Bascom Geoscience Center, Reston, Virginia 20192, USA CITATION: Regan, S.P., Walsh, G.J., Williams, M.L., Chiarenzelli, J.R., Toft, M., and McAleer, R., 2019, ■ ABSTRACT exhumation of high-grade terranes adjacent to upper-crustal rocks (Klepeis and Syn-collisional exhumation of hot middle crust in the King, 2009; Klepeis et al., 2016). Further, extensional structures may act as major Adirondack Mountains (New York, USA): Implications Extensional deformation in the lower to middle continental crust is increasingly conduits for magmas and both surficial and mantle-derived fluids (Rutte et al., for extensional orogenesis in the southern Grenville province: Geosphere, v. 15, no. 4, p. 1240–1261, https:// recognized and shown to have significant impact on crustal architecture, magma 2017). Therefore, understanding extensional tectonism in convergent tectonic doi.org /10.1130 /GES02029.1. emplacement, fluid flow, and ore deposits.