Hypogene titanian, vanadian maghemite in reworked oxide cumulates in the Beja layered gabbro complex, Odivelas, southeastern Portugal

Canadian Mineralogist

Volumn 41, Issue 5, 2003, Pages 1105-1124

  Jesus, Ana P ^a   Mateus, António ^a   Waerenborgh, Joao C ^b   Figueiras, Jorge ^a   Alves, Luís Cerqueira ^b   Oliveira, Vitor ^c  

^a UNIVERSITY OF LISBON   (Portugal)

^b INSTITUTO TECNOLÓGICO E NUCLEAR   (Portugal)

^c Instituto Geologico e Mineiro   (Portugal)

Author keywords

Beja Igneous Complex; Layered gabbros; Micro PIXE; M ssbauer spectroscopy; Oxidation; Portugal; Titanian maghemite

Indexed keywords

DIFFUSION; GRAVITATION; LIGHT REFLECTION; MAGNETIC MATERIALS; MOSSBAUER SPECTROSCOPY; OPTICAL MICROSCOPY; OXIDATION; TITANIUM COMPOUNDS; VANADIUM COMPOUNDS;

MAGNETIC OXIDES;

OXIDES;

GABBRO; MAGHEMITE; MINERALOGY; OXIDATION; OXIDE; PARAGENESIS;

BEJA [PORTUGAL]; EURASIA; EUROPE; ODIVELAS; PORTUGAL; SOUTHERN EUROPE;

EID: 0742285030     PISSN: 00084476     EISSN: None     Source Type: Journal    
DOI: 10.2113/gscanmin.41.5.1105     Document Type: Article

References (46)

1. ALLAN, J.E.M., COEY, J.M.D., SANDERS, I.S., SCHWERTMANN, U., FRIEDRICH, G. & WIECHOWSKI, A. (1989): An occurrence of a fully-oxidized natural litanomaghemite in basalt. Mineral. Mag. 53, 299-304.
2. f composites using the new Lisbon Nuclear Microprobe. Nucl. Instrum. Meth. B161-163, 334-338.
3. ANDRADE, A.S. (1974): Sur l'âge des orthogneiss d'Alcáçovas (Alentejo) et des filons (basiques et acides) qui les recoupent. Mem. Not. Museu Lab. Mineral. Geol. Univ. Coimbra 78, 29-36.
4. ANDRADE, A.S. (1983): Contribution à l'analyse de la suture Hercynienne de Beja (Portugal), perspectives métallogéniques. Thèse de doctorat, INLP. Univ. Nancy, Nancy, France.
5. ARAÚJO, A. (1995): Structure of a Geotransversal between Brinches and Mourão (Ossa-Morena Zone): Implications to the Geodynamic Evolution of the Southeast Margin of the Iberian Autochthon Terrain. Ph.D. thesis. Univ. of Évora, Portugal (in Portuguese, with Engl. abstr.).
6. BANERJEE, S.K. (1991): Magnetic properties of Fe-Ti oxides. In Oxide Minerals: Petrologic and Magnetic Significance (D.H. Lindsley. ed.). Rev. Mineral. 25, 107-128.
7. BAYLISS, P., ERD, R.C., MROSE, M., ROBERTS, A.C. & SABINA, A.P. (1993): Mineral Powder Diffraction File Databook. International Center for Diffraction Data. Park Lane, Pennsylvania.
8. BOUDREAU, A.E. & McBIRNEY, A.R. (1997): The Skaergaard layered series. III. Non-dynamic layering. J. Petrol. 38, 1003-1020.
9. BOWEN, L.H., DE GRAVE, E. & VANDENBERGHE, R.E. (1993): Mössbauer effect studies of magnetic soils and sediments. In Mössbauer Spectroscopy Applied to Magnetism and Materials Science 1 (G.J. Long & F. Grandjean, eds.). Plenum Press, New York. N.Y. (115-159).
10. BUDDINGTON, A.F. & LINDSLEY, D.H. (1964): Iron-titanium minerals and their synthetic equivalents. J. Petrol. 5, 310-357.
11. nd ed.). CRC Press, Boston, Massachusetts.
12. DA COSTA, G.M., DE GRAVE, E., BOWEN, L.H., DE BAKKER, P.M.A. & VANDENBERGHE, R.E. (1995): Temperature dependence of the hyperfine parameters of maghemite and Al-substituted maghemites. Phys. Chem. Minerals 22, 178-185.
13. 39Ar mineral age constraints for the tectonothermal evolution of the Variscan Suture in southwest Iberia. Tectonophysics 222, 177-194.
14. DUCHESNE, J.C. (1999): Fe-Ti deposits in Rogaland anorthosites (south Norway): geochemical characteristics and problems of interpretation. Mineral Deposita 34, 182-198.
15. FONSECA, P.E. (1995): Study of the Variscan Suture in the lberian SW, in the Serpa - Beja - Torrão and Alvito - Viana Regions. Ph.D. thesis, Univ. of Lisbon, Lisbon, Portugal (in Portuguese, with Engl. abstr.).
16. FONSECA, P.E. (1999): Geophysical prospecting through vertical components of the magnetic field in the Odivelas - Ferreira do Alentejo. Internal Report DPMM - IGM, Lisbon, Portugal (in Portuguese).
17. FROST, B.R. & LINDSLEY, D.H. (1991): Occurrence of iron-titanium oxides in igneous rocks. In Oxide Minerals: Petrologic and Magnetic Significance (D.H. Lindsley, ed.). Rev. Mineral. 25, 433-468.
18. GONÇALVES, M.A., MATEUS, A. & OLIVEIRA, V. (2001): Geochemical anomaly separation by multifractal modeling. J. Geochem. Explor. 72, 91-114.
19. GRIME, G.W. & DAWSON, M. (1995): Recent developments in data acquisition and processing on the Oxford scanning proton microprobe. Nucl. Instrum. Meth. B104, 107-113.
20. IRVINE, T.N. (1987): Glossary of terms for layered intrusions. In Origin of Igneous Layering (I. Parsons, ed.). D. Reidel Publishing Co., Dordrecht, The Netherlands (641-647).
21. JESUS, A.P. (2002): Fe-Ti-V Mineralizations and Sulphide Occurrences in Gabbroic Rocks of the Beja Igneous Complex (Odivelas - Ferreira do Alentejo). M.Sc. thesis, Univ. of Lisbon (in Portuguese, with Engl. abstr.).
22. KÄRKKÄNNEN, N. & APPELQVIST, H. (1999): Genesis of a low grade apatite - ilmenite - magnetite deposit in the Kauhajärvi gabbro, western Finland. Mineral. Deposita 34, 754-769.
23. MATEUS, A., JESUS, A.P., OLIVEIRA, V., GONÇALVES, M.A. & ROSA, C. (2001): Vanadiferous iron-titanium ores in gabbroic series of the Beja Igneous Complex (Odivelas, Portugal): remarks on their possible economic interest. Est. Notas e Trabalhos I.G.M. 43, 3-16.
24. MATHEZ, E.A. (1984): Influence of degassing on oxidation states of basaltic magmas. Nature 310, 371-375.
25. MAXWELL, J.A., TEESDALE, W.J. & CAMPBELL, J.L. (1995): The Guelph PIXE software package II. Nucl. Instrum. Meth. B95, 407-421.
26. MCBIRNEY, A.R. & NICOLAS, A. (1997): The Skaergaard layered series. II. Magmatic flow and dynamic layering. J. Petrol. 38, 569-580.
27. PARSONS, I., ed. (1987): Origin of Igneous Layering. D. Reidel Publishing Co., Dordrecht, The Netherlands.
28. PERROUD, H., BONHOMMET, N. & RIBEIRO, A. (1985): Paleomagnetism of Late Paleozoic igneous rocks from southern Portugal. Geophys. Res. Lett. 12, 45-48.
29. 2+ -Mg mixing properties of ilmenite, ferrous-pseudobrookite and ulvöspinel solid solutions. Contrib. Mineral. Petrol. 135, 198-211.
30. PUTNIS, A. (1992): Introduction to Mineral Sciences. Cambridge Univ. Press, Hampshire, U.K.
31. QUESADA, C., FONSECA, P.E., MUNHÁ, J.M., OLIVEIRA, J.T. & RIBEIRO, A. (1994): The Beja - Acebuches Ophiolite Complex (Southern Iberian Variscan Fold Belt): geological characterization and geodynamic significance. Bol. Geol. y Minero 105, 3-49.
32. 4 (x ≤ 0.09). J. Phys. Chem. Solids 48, 217-228.
33. RUMBLE, D., III, ed. (1976): Oxide Minerals. Mineral Soc. Am., Short Courses Notes 3.
34. SANTOS, J.F. (1990): Petrology of the Western Sector of the Odivelas Unit (Beja Massif). M.Sc. thesis, Univ. of Aveiro, Aveiro, Portugal (in Portuguese, with Engl. abstr.).
35. SANTOS, J.F. ANDRADE, S.A. & MUNHÁ, J. (1990): Variscan orogenic magmatism on the southern border of the Ossa Morena Zone. Comun. Serv. Geol. Portugal 76, 91-124 (in Portuguese, with Engl. abstr.).
36. SILVA, J.M. (1945): Notes about the iron deposit of Odivelas. Est. Notas e Trabalhos S.F.M. 1, 286-292 (in Portuguese).
37. SILVA, L.C., QUADRADO, R. & RIBEIRO, L. (1970): Previous notes about the existence of a zoned structure and of anorthosites in the gabbro-dioritic massif of Beja. Bol. Mus. Lab. Min. Geol. Univ. Lisboa 11, 223-232 (in Portuguese, with Engl. abstr.).
38. 2 and T-p paths of tholeiitic magmas. Contrib. Mineral. Petrol. 113, 73-86.
39. TOPPLIS, M.J. & CARROLL, M.R. (1995): An experimental study of the influence of oxygen fugacity on Fe-Ti oxide stability, phase relations, and mineral-melt equilibria in ferro-basaltic systems. J. Petrol. 36, 1137-1170.
40. VANDENBERGHE, R.E., BARRERO, C.A., DA COSTA, G.M., VAN SAN, E. & DE GRAVE, E. (2000): Mössbauer characterization of iron oxides and (oxy)hydroxides: the present state of the art. Hyperf. Interact. 126, 247-259.
41. VANDENBERGHE, R.E., HUS, J.J. & DE GRAVE, E. (1998): Evidence from Mössbauer spectroscopy of neo-formation of magnetite/ maghemite in the soils of loess/paleosol sequences in China. Hyperf. Interact. 117, 359-369.
42. WAERENBORGH, J.C., FIGUEIRAS, J., MATEUS, A. & GONÇALVES, M. (2002): Nature and mechanism of ilmenite alteration: a Mössbauer and X-ray diffraction study of oxidized ilmenite from the Beja-Acebuches Ophiolite Complex (SE Portugal). Mineral. Mag. 66, 421-430.
43. 4 (0
44. WAYCHUNAS, G.A. (1991): Crystal chemistry of oxides and oxyhydroxides. In Oxide Minerals: Petrologic and Magnetic Significance (D.H. Lindsley, ed.). Rev. Mineral. 25, 11-68.
45. WEBER, H.P. & HAFNER, S.S. (1971): Vacancy distribution in nonstoichiometric magnetites. Z. Kristallogr. 133, 327-340.
46. , programs for Rietveld refinement with PC and mainframe computers. J. Appl. Crystallogr. 28, 366-367.