Stoichiometry-based estimates of ferric iron in calcic, sodic-calcic and sodic amphiboles: A comparison of various methods

Anais da Academia Brasileira de Ciencias

Volumn 77, Issue 3, 2005, Pages 521-534

  Gualda, Guilherme A R ^a,b   Vlach, Silvio R F ^a  

^a Departamento de Mineralogia e Geotectônica   (Brazil)

^b UNIVERSITY OF CHICAGO   (United States)

Author keywords

Amphiboles; EPMA; Ferric iron; Stoichiometry

Indexed keywords

EID: 24344491171     PISSN: 00013765     EISSN: None     Source Type: Journal    
DOI: 10.1590/s0001-37652005000300012     Document Type: Article

References (26)

1. BASTIN GV, VAN LOO FJJ AND HEIJLIGERS HJM. 1984. Evaluation and use of Gaussian φ (ρpz) curves in quantitative electron probe microanalysis: a new optimization. X-ray Spectr 13: 91-97.
2. COSCA MA, ESSENE EI AND BOWMAN JR. 1991. Complete chemical-analyses of metamorphic hornblendes - implications for normalizations, calculated H2O activities, and thermobarometry. Contrib Mineral Petrol 108: 472-484.
3. CZAMANSKE GK AND ATKIN SA. 1985. Mctasomatism, titanian acmite, and alkali amphiboles in lithicwacke inclusions within the Coyote Peak diatreme, Humboldt-county, California. Amer Mineral 70: 499-516.
4. CZAMANSKE GK AND DILLET B. 1988. Alkali amphibole, tetrasilicic mica, and sodic pyroxene in peralkaline siliceous rocks, Questa Caldera, New Mexico. Amer J Sci 288A: 358-392.
5. nd ed., London: Longman, 696 p.
6. nd ed., London: Logman, v. 2B, 668 p.
7. 3+/σFe in amphibole by x-ray near edge structure (XANES) spectroscopy. In: DYAR MD, MCCAMMON C AND SHAEFFER MW (Eds), Mineral spectroscopy: A tribute to Roger E. Burns. Geochem Soc Spec Public 5: 165-171.
8. 3+ in ferromagnesian silicates and oxides from microprobe analysis, using stoichiometric criteria. Mineral Mag 51: 431-437.
9. + in mantle kaersutite - implications for mantle metasomatism. Amer Mineral 78: 968-979.
10. ENDERS M, SPEER D, MARESCH WV AND MCCAMMON CA. 2000. Ferric/ferrous iron ratios in sodic amphiboles: Mössbauer analysis, stoichiometry-based calculations and the high-resolution microanalytical flank method. Contrib Mineral Petrol 140: 135-147.
11. GUALDA GAR. 2001. Evolução petrográfica e mineralógica das associações alcalina e aluminosa dos Granitos Tipo-A da Graciosa, PR. MSc dissertation, Instituto de Geociências, Universidade de São Paulo, SP, Brasil, 271 p.
12. HAWTHORNE FC. 1983. The crystal-chemistry of the amphiboles. Can Mineral 21: 173-480.
13. HAWTHORNE FC, OBERTI R, ZANETTI A AND CZAMANSKE GK. 1998. The role of Ti in hydrogen-deficient amphiboles: Sodic-calcic and sodic amphiboles from Coyote Peak, California. Can Mineral 36: 1253-1265.
14. HOLLAND Y AND BLUNDY J. 1994. Non-ideal interactions in calcic amphiboles and their bearing on amphibole-plagioclase thermometry. Contrib Mineral Petrol 116: 433-447.
15. KING PL, WHITE AJR, CHAPPEL BW AND ALLEN CM. 1997. Characterization and origin of aluminous A-type granites from the Lachland Fold Belt, southeastern Australia. J Petrol 38: 371-391.
16. LAMEYRE J AND BOWDEN P. 1982. Plutonic rock type series: discrimination of various granitoid series and related rocks. J Volcan Geoth Res 14: 169-189.
17. LEAKE BE, WOOLEY AR, ARPS CES, BIRCH WD, GILBERT MC, GRICE JD, HAWTHORNE EC, KATO A, KISCH HJ, KRIVOVICHEV VG ET AL. 1997. Nomenclature of amphiboles : report of the Subcommittee on Amphiboles of the International Mineralogical Association Commission on New Minerals and Mineral Names. Can Mineral 35: 219-237.
18. LIN LI. 1989. A concordance correlation-coefficient to evaluate reproducibility. Biometrics 45: 255-268.
19. MARTINS L. 2001. Condições de cristalização de granitos sin- e tardi-orogênicos da porção central do Batólito Agudos Grandes, SP, com base em geoquímica de minerais e rochas. MSc dissertation, Instituto de Geociências, Universidade de São Paulo, SP, Brasil, 132p.
20. PAPIKE JJ, CAMERON KL AND BALDWIN K. 1974. Amphiboles and pyroxenes; characterization of other than quadrilateral components and estimates of ferric iron from microprobe data. Geol Soc Amer Abs Prog 6: 1053-1054.
21. ROBINSON P, SPEAR F, SCHUMACHER JC, LAIRD J, KLEIN C, EVANS BW AND DOOLAND BL. 1982. Phase relations of metamorphic amphiboles: natural occurrences and theory. Rev Mineral 9B: 69-76.
22. SCHUMACHER JC. 1991. Empirical ferric iron corrections: necessity, assumptions and effects on selected geothermobarometers. Mineral Mag 55: 3-18.
23. SCHUMACHER JC. 1997. Appendix 2: the estimate of ferric iron in electron microprobe analysis of amphiboles. Can Mineral 35: 238-246.
24. STOUT JH. 1972. Phase petrology and mineral chemistry of coexisting amphiboles from Telemark, Norway. J Petrol 13: 99-146.
25. SUTTON SR, DELANEY JS, BAJT S, RIVERS ML AND SMITH JV. 1993. Microanalysis of iron oxidation state in iron oxides using X-ray absorption near edge structure (XANES). In: Lunar and Planetary Science, Lunar and Planetary Institute 24: 1385-1386.
26. VLACH SRF, JANASI VA AND VASCONCELLOS ACBC. 1990. The Itu Belt: associated calc-alkaline and aluminous A-type late Brasiliano granitoids in the States of São Paulo and Parana, southern Brazil. In: CONGRESSO BRASILEIRO DE GEOLOGIA, 36, Natal, RN, Brazil 4: 1700-1711.