Geology: Research in the Adirondack Lowlands Skip Navigation
William Peck

William Peck

Professor of Geology; Chair, Department of Geology
Geology , 422 Ho Science Center
p 315-228-6798

The Black Lake Shear Zone: A Possible Terrane Boundary in the Adirondack Lowlands

Supported by the Keck Geology Consortium
students standing on a rock near a body of water

Friends of the Grenville, 2011

Black Lake Shear Zone: NW Adirondack Lowlands
September 9-11, 2011

The 2011 Friends of the Grenville Field Trip focused on the geology of the NW Adirondack Lowlands and the proposed boundary between the Lowlands and the Frontenac terrane: the Black Lake Shear Zone. For more information please see the guidebook and references at the bottom of the page.

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Download a PDF of photos of the Rockport Granite contact relations discussed on the field trip.

Over the last several years William Peck, Bruce Selleck, Martin Wong, and a number of students have been looking at the geology of the Adirondack Lowlands near Alexandria Bay, NY. The Black Lake shear zone in this area has been proposed as a potentially important tectonic boundary based on geologic and isotopic evidence. For this research, we have made a new structural, geochronologic and petrologic studies to constrain the location, kinematics and timing of deformation in the region, and the regional setting of this structure. U-Pb SHRIMP geochronology show that significant deformation occurred from ca. 1170-1100 Ma, likely dating the late stages of the Shawinigan orogeny and recording accretion of the Adirondacks to the margin of Laurentia during terrane assembly. William, Bruce, and Martin led a nine-student Keck project to investigate this region in 2008.
Geology of the Adirondack Lowlands, compiled by Joseph Catalano and Kurt Hollocher. Note that the distribution of the Antwerp-Rossie suite, Rockport granite, and Hyde School gneiss bodies appear to be controlled by the Black Lake shear zone. E= Edwardsville Syenite.

Related Research

(*indicates student author)

Peck, WH, Selleck, BS, Wong, MS, Chiarenzelli, JR, Harpp, KS, Hollocher, K, Lackey, JS, *Catalano, J, *Regan, SP, and *Stocker, A, 2013, Orogenic to post-orogenic (1.20-1.15 Ga) magmatism in the Adirondack Lowlands and Frontenac terrane, southern Grenville Province: Geosphere v. 9, p. 1637-1663.

Peck, WH, Selleck, BW, and Wong, MS, 2011, Geology of The Black Lake Shear Zone and Northwestern Adirondack Lowlands, Grenville Province, New York, Friends of the Grenville Annual Field Trip, September 10-11, 2011, Alexandria Bay, N.Y., 63 p. (download PDF)

Wong, MS, Peck, WH, Selleck, BW, *Catalano, JP, *Hochman, SD, and *Maurer, JT, 2011, The Black Lake Shear Zone: A boundary between terranes in the Adirondack Lowlands, Grenville Province: Precambrian Research, v. 188, p. 57-72.

Chiarenzelli, J, *Regan, S, Peck, WH, Selleck, BW, Cousens, B, Baird, G, Shrady, C, 2010, Shawinigan Magmatism in the Adirondack Lowlands as a Consequence of Closure of the Trans-Adirondack Back-Arc Basin: Geosphere, v. 6, p. 900-916.

Peck, WH, Selleck, BW, Wong, MS, 2009, The Black Lake shear zone: A possible terrane boundary in the Adirondack Lowlands (Grenville Province, New York): Twenty-second Keck Research Symposium in Geology (Franklin and Marshal College), p. 1-6.

*Catalano, J., Hollocher, K., Wong, M., 2009 Anisotropy of Magnetic Susceptibility and Trace element geochemistry of the Hyde School Gneiss and Rockport Granite, Northwest Adirondack Lowlands, New York. GSA Abstracts with Programs Vol. 41, No. 3

*Russell, AK, *Will, CN, Peck, W, Perkins, D, Dunn, SR, 2009, Recent calcite-graphite, Ti-in-biotite, garnet-biotite, and two feldspar thermometry of the Adirondack Lowlands, NY, and southern Frontenac terrane, Ontario: Geological Society of America Abstracts with Programs, v. 41(7), p. 634.

*Regan, SP., Peck, WH, Selleck, BW, Cousens, BL, Chiarenzelli, JR, 2009, Significance of the Antwerp-Rossie granitoids, Adirondack Lowlands, northern New York: Geological Society of America Abstracts with Programs, v. 41(3), p. 109.