Meta-gabbro weathering in the Georgia Piedmont, USA: Implications for global silicate weathering rates

Chemical Geology

Volumn 163, Issue 1-4, 2000, Pages 235-245

  Schroeder, Paul A ^a   Melear, Nathan D ^a   West, Larry T ^a   Hamilton, Dixie A ^a  

^a UNIVERSITY OF GEORGIA   (United States)

Author keywords

Georgia Piedmont; Meta gabbro; USA; Weathering

Indexed keywords

GABBRO; GLOBAL PERSPECTIVE; SILICATE; WEATHERING;

UNITED STATES;

EID: 0034093221     PISSN: 00092541     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0009-2541(99)00129-1     Document Type: Article

References (29)

1. Berner, E.K., Berner, R.A., 1987. The global water cycle: Geochemistry and Environment. Prentice-Hall, Englewood Cliffs, NJ, 397 pp.
2. Brimhall G.H., Dietrich W.E. Constitutive mass balance relations between chemical composition, volume, density, porosity and strain in metasomatic hydrothermal systems: results on weathering and pedogensis. Geochimica et Cosmochimica Acta. 51:1987;567-587.
3. Chung F.H. Quantitative interpretation of X-ray diffraction patterns of mixtures: I. Matrix-flushing method for quantitative multicomponent analysis. Journal of Applied Crystallography. 7:1974;519-526.
4. Chung F.H. Quantitative interpretation of X-ray diffraction patterns of mixtures: II. Adiabatic principle of X-ray diffraction analysis of mixtures. Journal of Applied Crystallography. 7:1974;526-531.
5. Conway, K.M., 1986. The Geology of The Northern Two-Thirds Of The Philomath Quadrangle, GA. Geology Department, University of Georgia, Athens, GA, p. 137.
6. Deer, W.A., Howie, R.A., Zussman, J., 1992. An Introduction to the Rock-forming Minerals. Longman Group, Hong Kong, 696 pp.
7. Fitzpatrick, E.A., 1993. Soil Microscopy And Micromorphology. Wiley, New York, USA, 304 pp.
8. Frost, L.W., 1991. Soil Survey of Oglethorpe County, GA. US Department of Agriculture, Soil Conservation Service, Washington, DC.
9. Hathaway J.C. Procedure for clay mineral analysis used in the sedimentary petrology laboratory of the US Geological Survey. Clay Minerals Bulletin. 3:1956;8-13.
10. Hodler, T.W., Schretter, H.A., 1986. The Atlas of Georgia. Institute of Community Area Development, The University of Georgia, Athens, GA, 273 pp.
11. Hurst V.J. Visual estimation of iron in saprolite. Geological Society of America Bulletin. 88:1977;174-176.
12. Hurst V.J., Schroeder P.A., Styron R.W. Accurate quantification of quartz and other phases by powder X-ray diffractometry. Analytica Chimica Acta. 337:1997;233-252.
13. Kirkland D.L., Hajek B.F. Formula derivation of Al-interlayered vermiculite in selected soil clays. Soil Science. 114(4):1972;317-322.
14. Lovingood, D., 1983. The Geology Of The Southern One-Third Of The Philomath And Northern One-Third Of The Crawfordville, Georgia Quadrangles. Geology Department, University of Georgia, Athens, GA, p. 243.
15. Melear, N.D., Schroeder, P.A., 1999. Crystal Chemistry of goethites from selected weathering profiles of the Georgia Piedmont: evidence for multigenerational mineral assemblages. Geoderma, in review.
16. Moore, D.E., Reynolds, R.C., 1997. X-ray diffraction and the identification and analysis of clay minerals, 2nd edn. Oxford Univ. Press, Oxford, 378 pp.
17. Murphy S.F., Brantley S.L., Blum A.E., White A.F., Dong H. Chemical weathering in a tropical watershed, Luquillo Mountains, Puerto Rico: II. Rate and mechanism of biotite weathering. Geochimica et Cosmochimica Acta. 62(2):1998;227-243.
18. Pavich M.J. Regolith residence time and the concept of surface age of the Piedmont "peneplain" Geomorphology. 2:1989;181-196.
19. Railsback L.B., Bouker P.A., Feeney T.P., Goddard E.A., Goggin K.E., Hall A.S., Jackson B.P., Mclain A.A., Orsega M.C., Rafter M.A., Webster J.W. A survey of the major-element geochemistry of the Georgia groundwater. Southeastern Geology. 36(3):1996;99-122.
20. Reynolds, R.C., 1985. NEWMOD - A Computer Program for the Calculation of One-dimensional Diffraction Patterns of Mixed-layered Clays. R.C. Reynolds, 8 Brook Rd., Hanover, NH 03755.
21. 27Al NMR spectroscopy American Mineralogist. 81:1996;26-38.
22. Schroeder P.A., Kim J.G., Melear N.D. Mineralogical and textural criteria for recognizing remnant Cenozoic deposits on the Piedmont: evidence from Sparta and Greene County, Georgia, USA. Sedimentary Geology. 108:1997;195-206.
23. 27Al MAS NMR spectra Clays and Clay Minerals. 46:1998;429-435.
24. Schwertmann, U., Cornell, R.M., 1991. Iron Oxides in the Laboratory: Preparation and characterization. VCH, Weinheim, Germany, 137 pp.
25. Shiflet, J.A., 1999. Characterization of titanium bearing phases in an east Georgia Kaolin. MS Thesis, University of Georgia, Athens, GA. 100 pp.
26. Soil Survey Staff, 1993. Soil Survey Manual. US Department of Agriculture Handbook 18. US Government Printing office, Washington, DC, 437 pp.
27. Velbel M.A. Weathering of hornblende to ferruginous products by a dissolution-precipitation mechanism: petrography and stoichiometry. Clays and Clay Minerals. 37(6):1989;515-524.
28. Velbel M.A. Geochemical mass balances and weathering rates in forested watersheds of the southern Blue Ridge: III. Cation budgets and the weathering rate of amphibole. American Journal of Science. 292:1992;58-78.
29. Velbel M.A., Charles L., Basso J., Zieg M.J. The natural weathering of staurolite: crystal-surface textures, relative stability, and the rate-determining step. American Journal of Science. 296:1996;453-472.