Publisher: GSA Journal: GEOL: Geology

Article ID: G22259

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Data Repository G22259 Whitney

Table DR1 (Appendix). Summary of lawsonite eclogite occurrences

Locality

Tectonic setting Field occurrence Reference

E Corsica, France Alpine nappes (Schistes Lustres) lenses in blueschist

Caron and Péquignot (1986)

Ward Creek, California, USA accretionary wedge (Franciscan Complex)

layers in metabasite Shibakusa and Maekawa (1997)

Sivrihisar Massif, Turkey subducted continental margin pods in blueschist facies rocks

this study

Pinchi Lake, BC, Canada

Canadian Cordillera (Cache Creek terrane)

erratics in glacial till (blueschists in vicinity)

Ghent et al. (1993)

Java, Indonesia

accretionary complex tectonic blocks Parkinson et al. (1998)

Samana Peninsula, Dominican Republic

accretionary complex beach pebble; mélange nearby Zack et al. (2004)

Kargı Massif, Turkey

accretionary complex blocks in mélange Altherr et al. (2004)

Port Macquarie, Australia

accretionary complex blocks in mélange

Och et al. (2003)

Motagua fault zone, Guatemala

strike-slip fault zone blocks in mélange

Harlow et al. (2004)

Garnet Ridge, Arizona, USA xenoliths in kimberlite Watson and Morton (1969)

Ghent, E.D., Stout, M.Z., and Erdmer, P., 1993, Pressure-temperature evolution of lawsonite-

bearing eclogites, Pinchi Lake, British Columbia: Journal of Metamorphic Geology, v. 11, p. 279–290.

Harlow, G.E., Hemming, S.R., Lallemant, H.G.A., Sisson, V.B., and Sorensen, S.S., 2004, Two high-pressure–low-temperature serpentinite-matrix mélange belts, Motagua fault zone, Guatemala: A record of Aptian and Maastrichtian collapse: Geology, v. 32, p. 17–20.

Och, D.J., Leitch, E.C., Caprarelli, G., and Watanabe, T., 2003, Blueschist and eclogite in tectonic mélange, Port Macquarie, New South Wales, Australia: Mineralogical Magazine, v. 67, p. 609–624, doi: 10.1180/0026461036740121.

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Publisher: GSA Journal: GEOL: Geology

Article ID: G22259

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Parkinson, C.D., Miyazaki, K., Wakita, K., Barber, A.J., and Carswell, D.A., 1998, An overview and tectonic synthesis of the pre-Tertiary very-high-pressure metamorphic and associated rocks of Java, Sulawesi and Kalimantan, Indonesia: The Island Arc, v. 7, p. 184–200, doi: 10.1046/j.1440-1738.1998.00184.x.

Watson, K.D., and Morton, D.M., 1969, Eclogite inclusions in kimberlite pipes at Garnet Ridge, northeastern Arizona: American Mineralogist, v. 54, p. 267–285.

Caption for Fig. DR1 (A) Photomicrograph of a rare example of glaucophane rimming omphacite in a Sivrihisar eclogite/blueschist. The garnets contain glaucophane inclusions and abundant lawsonite. (B) Completely altered eclogite consisting entirely of epidote + chlorite. In other samples, hexagonal chlorite-rich regions such as the one in the center of the photo contain relict garnet.

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