Hostname: page-component-848d4c4894-hfldf Total loading time: 0 Render date: 2024-05-17T15:02:31.563Z Has data issue: false hasContentIssue false
  • English
  • Français

Etch pits on naturally altered olivine from dunites of the Appalachian Blue Ridge Mountains, North Carolina, USA

Published online by Cambridge University Press:  05 July 2018

M. A. Velbel  and
J. M. Ranck
M. A. Velbel*
Affiliation:
Department of Geological Sciences, 206 Natural Science Building, Michigan State University, East Lansing, MI 48824-1115, USA
J. M. Ranck
Affiliation:
URS Corporation-North Carolina, 1600 Perimeter Park Drive, Morrisville, NC 27560, USA
*
*E-mail: velbel@msu.edu
Get access Rights & Permissions [Opens in a new window]

Abstract

Naturally weathered olivine from metamorphosed, tectonized metadunite is corroded by funnel-shaped etch pits. Large etch pits form by weathering, and are not inherited from pre-weathering alteration of these rocks. Comparison of etch pits on olivine in naturally weathered metadunite with naturally weathered olivine phenocrysts from volcanic rocks suggests that olivine etch pits are similar in all sample suites, despite differences in crystallization and weathering/exposure ages, and regolith history.

Type
Research Article
Information
Mineralogical Magazine , Volume 72 , Issue 1 , February 2008 , pp. 145 - 148
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2008

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Delvigne, J., Bisdom, E.B.A., Sleeman, J. and Stoops, G. (1979) Olivines, their pseudomorphs and secondary products. Pedologie, 29, 247–309.Google Scholar
Feiss, P.G., Maybin, A.H. III, Riggs, S.R. and Grosz, A.E. (1991) Mineral Resources of the Carolinas. Pp. 319–345 in: The Geology of the Carolina. (Horton, J.W. Jr., and Zullo, V.A., editors). The University of Tennessee Press.Google Scholar
Goldich, S.S. (1938) A study in rock weathering. Journal of Geology, 46, 17–58.CrossRefGoogle Scholar
Grandstaff, D.E. (1978) Changes in surface area and morphology and the mechanism of forsterite dissolution. Geochimica et Cosmochimica Acta, 42, 1899–1901.CrossRefGoogle Scholar
Gravenor, C.P. and Leavitt, R.K. (1981) Experimental formation and significance of etch patterns on detrital garnets. Canadian Journal of Earth Sciences, 18, 765–775.CrossRefGoogle Scholar
Hatcher, R.D. Jr., Hooper, R.J., Petty, S.M. and Willis, J.D. (1984) Structure and chemical petrology of three southern Appalachian mafic-ultramafic complexes and their bearing upon the tectonics of emplacement and origin of Appalachian ultramafic bodies. American Journal of Science, 284, 484–506.CrossRefGoogle Scholar
Krinsley, D.H. and Doornkamp, J.C. (1973) Atlas of Quartz Sand Surface Textures. Cambridge University Press, Cambridge, UK, 91 pp.Google Scholar
Morton, A.C. and Hallsworth, C.R. (1999) Processes controlling the composition of heavy minerals in sandstones. Sedimentary Geology, 124, 3–29.CrossRefGoogle Scholar
Patino, L.C., Velbel, M.A., Price, J.R. and Wade, J.A. (2003) Trace element mobility during spheroidal weathering of basalts and andesites in Hawaii and Guatemala. Chemical Geology, 202, 343–364.CrossRefGoogle Scholar
Velbel, M.A. (1993) Formation of protective surface layers during silicate-mineral weathering under well-leached, oxidizing conditions. American Mineralogist, 78, 408–417.Google Scholar
Wilson, M.J. (2004) Weathering of the primary rock-forming minerals; processes, products and rates. Clay Minerals, 39, 233–266.CrossRefGoogle Scholar
Wilson, M.J. and Jones, D. (1983) Lichen weathering of minerals: implications for pedogenesis. Pp. 5–12 in: Residual Deposits: Surface Related Weathering Processes and Material. (Wilson, R.C., editor). Special Publication, 11, Geological Society, London.Google Scholar
Wilson, W.F. and McKenzie, B.J. (1978) Mineral Collecting Sites in North Carolina. North Carolina Department of Natural Resources and Community Development, Geological Survey Section, Information Circular 24, 122 pp.Google Scholar