Publications and communications of Jean-Clair Duchesne

Baginski, B., Duchesne, J.-C., Martin, H., & Wiszniewska, J. (2007). Isotopic and geochemical constraints on the evolution of the Mazury granitoids (NE Poland). In A. Koslowski & J. Wiszniewska (Eds.), Granitoids in Poland (pp. 11-30).

Duchesne, J.-C., & Vander Auwera, J. (2001). Ti deposits in anorthosite: geochemical constraints on the economic value. In A. Piestrzynski, Mineral deposits at the beginning of the 21st century. Lisse, Netherlands: Swets & Zeitlinger.

Wiszniewska, J., Duchesne, J.-C., Stein, H. J., & Jedrysek, M. O. (2001). Petrologic and isotope evidence for crustal source of ore-bearing Suwalki anorthosites, Poland. In A. Piestrzynski, Mineral deposits at the beginning of the 21st century (pp. 635-638). Lisse, Netherlands: Swets & Zeitlinger.

Duchesne, J.-C. (1996). Liquid ilmenite or liquidus ilmenite: a comment on the nature of ilmenite vein deposits. In D. Demaiffe, Petrology and geochemistry of magmatic suites of rocks in the continental and oceanic crust (a volume dedicated to Professor Jean Michot) (pp. 73-82). Brussels, Belgium: ULB-MRAC Tervuren.

Wilson, J. R., Robins, B., Nielsen, F. M., Duchesne, J.-C., & Vander Auwera, J. (1996). The Bjerkreim-Sokndal layered intrusion, Southwest Norway. In R. G. Cawthorn, Layered intrusions (pp. 231-255). Amsterdam, Netherlands: Elsevier Science.

Duchesne, J.-C. (1984). Massif anorthosites: another partisan review. In W. L. Brown, Feldspars and Feldspathoids (pp. 411-433). Dordrecht, Netherlands: Reidel. doi:10.1007/978-94-015-6929-3_11

Roelandts, I., & Duchesne, J.-C. (1979). Rare-earth elements in apatite from layered norites and iron-titanium oxide ore-bodies related to anorthosites (Rogaland, S.W. Norway). In L. H. Ahrens, Origin and distribution of the elements (pp. 199-212). Oxford, United Kingdom: Pergamon Press.

de Ward, D., Duchesne, J.-C., & Michot, J. (1974). Anorthosites and their environment. In J. Bellière & J.-C. Duchesne (Eds.), Géologie des Domaines cristallins (pp. 323-346). Liège, Belgium: Société Géologique de Belgique.

Duchesne, J.-C., Bingen, B., Wilmart, E., Graulich, M., & Huyskens, M. (25 April 2024). Episodic anorthosite-mangerite-charnockite -granite (AMCG) plutonism in Rogaland, South Norway: the 1.24 Ga Gloppurdi and Botnavatn fayalite-bearing charnockitic intrusions. Norwegian Journal of Geology, 104 (202403/issue 1), 1-35. doi:10.17850/njg104-1-3

Duchesne, J.-C., & Hertogen, J. (April 2021). The Farsund Shear Zone: geochemical evidence for lithological diversity in the wall rock of the Rogaland anorthosite province, South Norway. Norwegian Journal of Geology, 100.

Duchesne, J.-C., Meus, P., & Boulvain, F. (2017). Geochemistry of Lower Devonian terrigenous sedimentary rocks from the Belgian Ardenne: Source proxy and paleogeographic reconstruction. Sedimentary Geology. doi:10.1016/j.sedgeo.2017.11.008

Charlier, B., Namur, O., Bolle, O., Latypov, R., & Duchesne, J.-C. (2015). Fe–Ti–V–P ore deposits associated with Proterozoic massif-type anorthosites and related rocks. Earth-Science Reviews, 141 (0), 56-81. doi:10.1016/j.earscirev.2014.11.005

Duchesne, J.-C., & Liégeois, J.-P. (2015). The origin of nelsonite and high-Zr ferrodiorite associated with Proterozoic anorthosite. Ore Geology Reviews, 71, 40-56. doi:10.1016/j.oregeorev.2015.05.005

Vander Auwera, J., Bolle, O., Dupont, A., Pin, C., Paquette, J.-L., Charlier, B., Duchesne, J.-C., Mattielli, N., & Bogaerts, M. (2014). Source-derived heterogeneities in the composite (charnockite-granite) ferroan Farsund intrusion (SW Norway). Precambrian Research. doi:10.1016/j.precamres.2014.06.003

Vander Auwera, J., Charlier, B., Duchesne, J.-C., Bingen, B., Longhi, J., & Bolle, O. (2014). Comment on Bybee et al. (2014): Pyroxene megacrysts in Proterozoic anorthosites: Implications for tectonic setting, magma source and magmatic processes at the Moho. Earth and Planetary Science Letters. doi:10.1016/j.epsl.2014.06.031

Duchesne, J.-C., Liégeois, J.-P., Bolle, O., Vander Auwera, J., Bruguier, O., Matukov, D. I., & Sergeev, S. (2013). The fast evolution of a crustal hot zone at the end of a transpressional regime: The Saint-Tropez peninsula granites and related dykes (Maures Massif, SE France). Lithos, 162-163, 195-220. doi:10.1016/j.lithos.2012.12.019

Duchesne, J.-C., & Bologne, G. (2011). Short note: Synthetic ilmenite as a blank to XRF trace element determination. Geologica Belgica, 14 (1-2), 103-106.

Vander Auwera, J., Bolle, O., Bingen, B., Liégeois, J.-P., Bogaerts, M., Duchesne, J.-C., De Waele, B., & Longhi, J. (2011). Sveconorwegian massif-type anorthosites and related granitoids result from post-collisional melting of a continental arc root. Earth-Science Reviews, 107, 375-397. doi:10.1016/j.earscirev.2011.04.005

Charlier, B., Duchesne, J.-C., Vander Auwera, J., Storme, J.-Y., Maquil, R., & Longhi, J. (2010). Polybaric fractional crystallization of high-alumina basalt parental magmas in the Egersund-Ogna massif-type anorthosite (Rogaland, SW Norway) constrained by plagioclase and high-alumina orthopyroxene megacrysts. Journal of Petrology, 51 (12), 2547-2570. doi:10.1093/petrology/egq066

Charlier, B., Namur, O., Malpas, S., de Marneffe, C., Duchesne, J.-C., Vander Auwera, J., & Bolle, O. (2010). Origin of the giant Allard Lake ilmenite ore deposit (Canada) by fractional crystallization, multiple pulses and mixing. Lithos, 117, 119-134. doi:10.1016/j.lithos.2010.02.009

Duchesne, J.-C., Martin, H., Baginski, B., Wiszniewska, J., & Vander Auwera, J. (2010). The origin of ferroan-potassic A-type granitoids: the case of the hornblende–biotite granite suite of the Mesoproterozoic Mazury Complex, northeastern Poland. Canadian Mineralogist. doi:10.3749/canmin.48.4.947

Charlier, B., Namur, O., Duchesne, J.-C., Wiszniewska, J., Parecki, A., & Vander Auwera, J. (2009). Cumulate origin and polybaric crystallization of Fe-Ti oxide ores in the Suwalki anorthosite, northeastern Poland. Economic Geology and the Bulletin of the Society of Economic Geologists, 104, 205-221. doi:10.2113/gsecongeo.104.2.205

Duchesne, J.-C., & Bologne, G. (2009). XRF major and trace element determination in Fe-Ti oxide minerals. Geologica Belgica, 12 (3-4), 205-212.

Charlier, B., Sakoma, E., Sauvé, M., Stanaway, K., Vander Auwera, J., & Duchesne, J.-C. (2008). The Grader layered intrusion (Havre-Saint-Pierre anorthosite, Québec) and genesis of nelsonite and other Fe-Ti-P ores. Lithos, 101 (3-4), 359-378. doi:10.1016/j.lithos.2007.08.004

Duchesne, J.-C., Liégeois, J.-P., Iancu, V., Berza, T., Matukov, D. I., Tatu, M., & Sergeev, S. A. (2008). Post-collisional melting of crustal sources: constraints from geochronology, petrology and Sr, Nd isotopes geochemistry of the Variscan Sichevita and Poniasca granitoid plutons. International Journal of Earth Sciences, 97, 705-723. doi:10.1007/s00531-007-0185-z

Charlier, B., Skar, O., Korneliussen, A., Duchesne, J.-C., & Vander Auwera, J. (2007). Ilmenite composition in the Tellnes Fe–Ti deposit, SW Norway: fractional crystallization, postcumulus evolution and ilmenite–zircon relation. Contributions to Mineralogy and Petrology, 154 (2), 119-134. doi:10.1007/s00410-007-0186-8

Duchesne, J.-C., Vander Auwera, J., & Charlier, B. (2007). Empirical calibration of the V partitioning between magnetite and ilmenite as an oxybarometer. EOS, 88 (52), 54A-08.

Duchesne, J.-C., Vander Auwera, J., Liégeois, J.-P., Barton, E. S., & Clifford, T. N. (2007). Geochemical constraints of the petrogenesis of the O'okiep Koperberg Suite and granitic plutons in Namaqualand, South Africa: a crustal source in Namaquan (Grenville) times. Precambrian Research, 153, 116-142. doi:10.1016/j.precamres.2006.11.005

Charlier, B., Duchesne, J.-C., & Vander Auwera, J. (15 November 2006). Magma chamber processes in the Tellnes ilmenite deposit (Rogaland Anorthosite Province, SW Norway) and the formation of Fe-Ti ores in massif-type anorthosites. Chemical Geology, 234 (3-4), 264-290. doi:10.1016/j.chemgeo.2006.05.007

Vander Auwera, J., Weis, D., & Duchesne, J.-C. (July 2006). Marginal mafic intrusions as indicators of downslope draining of dense residual melts in anorthositic diapirs? Lithos, 89 (3-4), 329-352. doi:10.1016/j.lithos.2005.12.004

Sonny, D., Bologne, G., Duchesne, J.-C., & Philippart, J.-C. (2006). Utilisation de la microchimie de l'otolithe pour discriminer les populations de chabots au sein du bassin de la Meuse walonne. Cahiers d'Ethologie, 22 (2), 39-50.

Charlier, B., Vander Auwera, J., & Duchesne, J.-C. (2005). Geochemistry of cumulates from the Bjerkreim-Sokndal layered intrusion (S. Norway). Part II. REE and the trapped liquid fraction. Lithos, 83 (3-4), 255-276. doi:10.1016/j.lithos.2005.03.005

Duchesne, J.-C., & Charlier, B. (2005). Geochemistry of cumulates from the Bjerkreim-Sokndal layered intrusion (S. Norway). Part I. Constraints from major elements on the mechanism of cumulate formation and on the jotunite liquid line of descent. Lithos, 83 (3-4), 229-254. doi:10.1016/j.lithos.2005.03.004

Duchesne, J.-C., Goemaere, E., Grigolato, J.-C., Vanderschueren, H., & Charlier, B. (2005). Altered rhyolitic rocks in the Visé boreholes: a geochemical approach. Geologica Belgica, 8 (3), 71-83.

Duchesne, J.-C., Liégeois, J.-P., Deblond, A., & Tack, L. (2004). Petrogenesis of the Kabanga-Musongati layered mafic-ultramafic intrusions in Burundi (Kibaran Belt): geochemical, Sr-Nd isotopic constraints and Cr-Ni behaviour. Journal of African Earth Sciences, 39, 133-145. doi:10.1016/j.jafrearsci.2004.07.055

Vander Auwera, J., Bogaerts, M., Liégeois, J.-P., Demaiffe, D., Wilmart, E., Bolle, O., & Duchesne, J.-C. (2003). Derivation of the 1.0-0.9 Ga ferro-potassic A-type granitoids of southern Norway by extreme differentiation from basic magmas. Precambrian Research, 124 (2-4), 107-148. doi:10.1016/S0301-9268(03)00084-6

Wiszniewska, J., Claesson, S., Stein, H., Vander Auwera, J., & Duchesne, J.-C. (December 2002). The north-eastern Polish anorthosite massifs: petrological, geochemical and isotopic evidence for a crustal derivation. Terra Nova, 14 (6), 451-460. doi:10.1046/j.1365-3121.2002.00443.x

Baginski, B., Duchesne, J.-C., Vander Auwera, J., Martin, H., & Wiszniewska, J. (2001). Petrology and geochemistry of rapakivi-type granites from the crystalline basement of NE Poland. Geological Quarterly, 45 (1), 33-52.

Bolle, O., Diot, H., & Duchesne, J.-C. (2000). Magnetic fabric and deformation in charnockitic igneous rocks of the Bjerkreim-Sokndal layered intrusion (Rogaland, Soutwest Norway). Journal of Structural Geology, 22, 647-667. doi:10.1016/S0191-8141(99)00183-2

Vander Auwera, J., Longhi, J., & Duchesne, J.-C. (2000). The effect of pressure on DSr (plag/melt) and DCr (opx/melt): implications for anorthosite petrogenesis. Earth and Planetary Science Letters, 178, 303-314. doi:10.1016/S0012-821X(00)00086-8

Barnichon, J.-D., Havenith, H.-B., Hoffer, B., Charlier, R., Jongmans, D., & Duchesne, J.-C. (1999). The deformation of the Egersund-Ogna anorthosite massif, south Norway: finite-element modelling of diapirism. Tectonophysics, 303 (1-4), 109-130. doi:10.1016/S0040-1951(98)00247-9

Duchesne, J.-C., Liégeois, J.-P., Vander Auwera, J., & Longhi, J. (1999). The crustal tongue melting model and the origin of massive anorthosites. Terra Nova, 11, 100-105. doi:10.1046/j.1365-3121.1999.00232.x

Longhi, J., Vander Auwera, J., Fram, M. S., & Duchesne, J.-C. (1999). Some phase equilibrium constraints on the origin of Proterozoic (massif) anorthosites and related rocks. Journal of Petrology, 40, 339-362. doi:10.1093/petroj/40.2.339

Nzali, T., Duchesne, J.-C., Jacquemin, C., & Vander Auwera, J. (1999). Pyrométamorphisme induit par la gézéification souterraine de niveaux charbonneux du Westphalien dans le Bassin de Mons (Belgique). Geologica Belgica, 2 (3-4), 221-234.

Duchesne, J.-C., Berza, T., Liégeois, J.-P., & Vander Auwera, J. (1998). Shoshonitic liquid line of descent from diorite to granite: the Late Precambrian post-collisional Tismana pluton (South Carpathians, Romania). Lithos, 45, 281-303. doi:10.1016/S0024-4937(98)00036-X

Vander Auwera, J., Longhi, J., & Duchesne, J.-C. (1998). A liquid line of descent of the jotunite (hypersthene diorite) suite. Journal of Petrology, 39, 439-468.

Bolle, O., Diot, H., & Duchesne, J.-C. (1997). Anisotropie de la suceptibilité magnétique dans une intrusion composite de la suite charnockitique: l'apophyse du massif stratiforme de Bjerkreim-Sokndal (Rogaland, Norvège méridionale). Comptes Rendus de l'Académie des Sciences. Série 2, Mécanique, Physique, Chimie, Sciences de l'Univers, Sciences de la Terre, 325, 799-805.

Liégeois, J.-P., Berza, T., Tatu, M., & Duchesne, J.-C. (1996). The Neoproterozoic Pan-African basement from the Alpine Lower Danubian nappe system (South Carpathians, Romania). Precambrian Research, 80, 281-301. doi:10.1016/S0301-9268(96)00019-8

Roelandts, I., & Duchesne, J.-C. (October 1994). 1993 Compilation of data on five Belgian sedimentary rock reference materials: AWI-1, SBO-1, PRI-1, CCH-1 and AWI-1. Geostandards Newsletter, 28 (2), 143-184. doi:10.1111/j.1751-908X.1994.tb00515.x

Wilmart, E., Pineau, F., Réjou-Michel, A., & Duchesne, J.-C. (1994). Fluid transfer in anorthosites and related rocks from Rogaland (Southwest Norway): Evidence from stable isotopes. Earth and Planetary Science Letters, 125, 55-70. doi:10.1016/0012-821X(94)90206-2

Jensen, J. C., Nielsen, F. M., Duchesne, J.-C., Demaiffe, D., & Wilson, J. R. (1993). Magma influx and mixing in the Bjerkreim-Sokndal layered intrusion, South Norway: evidence from the boundary between two-megacyclic units at Storeknuten. Lithos, 29, 311-325. doi:10.1016/0024-4937(93)90025-8

Duchesne, J.-C. (1992). Commentaires sur "Le tectonolopolite composite de Bjerkreim-Sokndal, sa bordure nord-orientale en faille soudée avec ceinture pseudomagmatique de cornéites noritiques enallogènes (Rogaland, Norvège)" de P. Michot. Annales de la Société Géologique de Belgique, 115, 363-369.

Duchesne, J.-C. (1990). Origin and evolution of monzonorites related to anorthosites. Schweizerische Mineralogische und Petrographische Mitteilungen, 70, 189-198.

Duchesne, J.-C., Wilmart, E., Demaiffe, D., & Hertogen, J. (1989). Monzonorites from Rogaland (Southwest Norway): a series of rocks coeval but not comagmatic with massi-type anorthosites. Precambrian Research, 45, 111-128. doi:10.1016/0301-9268(89)90034-X

Wilmart, E., Demaiffe, D., & Duchesne, J.-C. (1989). Geochemical constraints on the genesis of the Tellnes Ilmenite deposit, southwest Norway. Economic Geology and the Bulletin of the Society of Economic Geologists, 84, 1047-1056. doi:10.2113/gsecongeo.84.5.1047

Duchesne, J.-C., & Hertogen, J. (1988). Le magma parental du lopolithe de Bjerkreim-Sokndal (Norvège méridionale). Comptes Rendus de l'Académie des Sciences. Série 2, Mécanique, Physique, Chimie, Sciences de l'Univers, Sciences de la Terre, 306 (série II), 45-48.

Roelandts, I., Robaye, G., Weber, G., Delbrouck, J. M., & Duchesne, J.-C. (May 1987). Determination of fluorine by proton-induced gamma-ray emission (PIGE) spectrometry in igneous and metamorphic charnockitic rocks from Rogaland (S.W. Norway). Journal of Radioanalytical and Nuclear Chemistry, 112 (2), 453-460. doi:10.1007/BF02132377

Duchesne, J.-C., Caruba, R., & Iacconi, P. (1987). Zircon in charnockitic rocks from Rogaland (Southwest Norway): petrogenetic implications. Lithos, 20, 357-368. doi:10.1016/0024-4937(87)90016-8

Duchesne, J.-C., Denoiseux, B., & Hertogen, J. (1987). The norite-mangerite relationships in the Bjerkreim-Sokndal layered lopolith (SW Norway). Lithos, 20, 1-17.

Sondag, F., & Duchesne, J.-C. (1987). The use of geochemical methods to characterize the metamorphic domain in the Belgian Ardennes. Journal of Geochemical Exploration, 27, 311-321. doi:10.1016/0375-6742(87)90158-0

Wilmart, E., & Duchesne, J.-C. (1987). Geothermobarometry of igneous and metamorphic rocks around the Ana-Sira anorthosite massif: implications for the depth of emplacement of the South Norvegian anorthosites. Norwegian journal of geology, 67, 185-196.

Demaiffe, D., Weis, D., Michot, J., & Duchesne, J.-C. (1986). Isotopic constraints on the genesis of the anorthosite suite of rocks. Chemical Geology, 57, 167-179.

Duchesne, J.-C., Demaiffe, D., Roelandts, I., & Weis, D. (1985). Petrogenesis of monzonoritic dykes in the Egersund-Ogna anorthosite (Rogaland, SW Norway). Contributions to Mineralogy and Petrology, 90, 214-225.

Duchesne, J.-C., Schumacher, C., Rouhart, A., & Dillen, H. (1983). Thallium, Nickel, Cobalt and other trace elements in iron sulfides from Belgian lead-zinc vein deposits. Mineralium Deposita, 10, 303-313. doi:10.1007/BF00206481

Liégeois, J.-P., & Duchesne, J.-C. (1981). The Lac Cornu retrograded eclogites (Aiguilles Rouges massif, Western Alps, France): evidence of crustal origin and metasomatic alteration. Lithos, 14, 35-48. doi:10.1016/0024-4937(81)90035-9

Duchesne, J.-C. (1978). Quantitative modeling of Sr, Ca, Rb, K in the Bjerkreim-Sokndal lopolith (S.W. Norway). Contributions to Mineralogy and Petrology, 66, 175-184.

Duchesne, J.-C., & Demaiffe, D. (1978). Trace elements and anorthosite genesis. Earth and Planetary Science Letters, 38, 249-272. doi:10.1016/0012-821X(78)90134-6

Duchesne, J.-C., Roelandts, I., Demaiffe, D., Hertogen, J., Gijbels, R., & De Winter, J. (1974). Rare-earth data on monzonoritic composition of charnockitic acidic rocks related to anorthosites (Rogaland, S.W. Norway). Earth and Planetary Science Letters, 24, 325-335.

Duchesne, J.-C. (1972). Iron-Titanium oxide minerals in the Bjerkrem-Sogndal massif, south-western Norway. Journal of Petrology, 13 (1), 57-81. doi:10.1093/petrology/13.1.57

Duchesne, J.-C. (1972). Fe-Ti oxide minerals in the Bjerkrem-Sogndal massif (Norway). Journal of Petrology, 13, 57-81.

Duchesne, J.-C. (1971). Le rapport Sr/Ca dans les plagioclases du massif de Bjerkreim-Sogndal et son évolution dans la cristallisation fractionnée du magma plagioclasique. Chemical Geology, 8, 123-130.

Maquil, R., & Duchesne, J.-C. (1984). Géothermométrie par les pyroxènes et mise en place du massif anorthositique d'Egersund-Ogna (Rogaland, Norvège méridionale). Annales de la Société Géologique de Belgique, 107, 27-49.

Demaiffe, D., Duchesne, J.-C., Michot, J., & Pasteels, P. (1973). Le massif anorthosito-leuconoritique d'Hidra et son faciès de bordure. Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences. Série D, Sciences Naturelles, 277, 14-20.

Duchesne, J.-C. (1970). Sur la provenance de xénolithes anorthositiques dans le masif de Bjerkreim-Sogndal (Norvège). Annales de la Société Géologique de Belgique, 93, 523-526.

Duchesne, J.-C. (1970). Microtextures of Fe-Ti oxide minerals in the South-Rogaland anorthositic complex (Norway). Annales de la Société Géologique de Belgique, 935, 527-544.

Duchesne, J.-C. (1967). Les relations Sr-Ca dans les plagioclases des anorthosites du Rogaland méridional. Annales de la Société Géologique de Belgique, 91, 159-164.

Duchesne, J.-C. (1966). Séparation rapide des minéraux des roches. Annales de la Société Géologique de Belgique, 89, 347-356.

Duchesne, J.-C. (1964). Présence de thallium dans les sulfures de fer de la mine de Pallière (Gard, France). Annales de la Société Géologique de Belgique, 87, 1-17.

Duchesne, J.-C. (1962). Un gisement de Pyritoshaera barbaria dans le Cambrien de la vallée du Bayehon (Ardennes Belges). Annales de la Société Géologique de Belgique, 86, 123-130.

Vander Auwera, J., Bogaerts, M., Liégeois, J.-P., Duchesne, J.-C., & Bolle, O. (2008). A-type magmatic suites as tracers of the lower crust. AGC/GAC – AMC/MAC – SEG – SGA Abstract Volume, 33, 177-178.

Duchesne, J.-C., & Vander Auwera, J. (2001). Fe-Ti-V-P deposits in anorthosite complexes: the bearing of parental magma composition and crystallization conditions on the economic value. In A. Piestrzynski, Mineral deposits at the beginning of the 21st century (pp. 569-571). Lisse, Netherlands: Balkema.

Duchesne, J.-C., & Vander Auwera, J. (2001). Fe-Ti-V-P deposits in anorthosite complexes: the bearing of parental magma composition and crystallization conditions on the economic value. Proceedings Joint Sixth Biennal SGA-SEG Meeting, 9, 60-61.

Duchesne, J.-C. (1995). Quelles recherches au Sud dans les universités. In La coopération universitaire au développement - Réflexions sur une refondation (pp. 87-90).

Duchesne, J.-C. (1973). Les gisements d'oxydes de fer et titane dans les roches anorthositiques du Rogaland (Norvège méridionale). In Colloque scientifique international Eugène Raguin (pp. 241-248). Paris, France: Elsevier Masson.

Duchesne, J.-C. (1972). Pyroxènes et olivines dans le massif de Bjerkreim-Sogndal (Norvège méridionale). Contribution à l'étude de ls série anorthosite-mangérite. In 24th IGC, Section 2 (pp. 320-328).

Vander Auwera, J., Longhi, J., & Duchesne, J.-C. (2003). Some results on the role of P, T, and fO2 on ilmenite composition [Paper presentation]. GEODE field workshop on Ilmenite Deposits in the Rogaland Anorthosite Province.