10.5880/fidgeo.2025.025 eng dataset GFZ German Research Centre for Geosciences datapub@gfz-potsdam.de http://www.gfz-potsdam.de Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences pointOfContact 2025-08-12 urn:ogc:def:crs:EPSG:4326 Petrological, geochemical and isotopic characterization of kamafugites from East-Central Africa, Italy and Brazil: a review 2025-08-12 revision doi:10.5880/fidgeo.2025.025 Innocenzi, Francesca Dipartimento di Scienze della Terra, Sapienza Università di Roma, Roma, Italy author Foley, Stephen School of Natural Sciences, Macquarie University, New South Wales, Australia author Ronca, Sara Dipartimento di Scienze della Terra, Sapienza Università di Roma, Roma, Italy author Agostini, Samuele Istituto di Geoscienze e Georisorse – CNR, Pisa, Italy author Guarino, Vincenza Dipartimento di Scienze della Terra, dell'Ambiente e delle Risorse, Università di Napoli Federico II, Complesso Universitario Monte Sant'Angelo, Napoli, Italy author Lustrino, Michele Dipartimento di Scienze della Terra, Sapienza Università di Roma, Roma, Italy author Laboratory of Geochronology and Radiogenic Isotope Geochemistry - Pisa1 (IGG-CNR, Italy) Istituto di Geoscienze e Georisorse (IGG) – CNR of Pisa, Pisa, Italy originator Sapienza Università di Roma (Italy) Sapienza Università di Roma, Roma, Italy originator GFZ Data Services publisher Kamafugites are 'exotic igneous rocks' with mineralogical and chemical compositions that differ from those observed in common magmas. Despite their importance, kamafugites are still a poorly constrained topic and they lack a general petrological model due to their variable petrographic, geochemical and isotopic features. A detailed comparison among kamafugites is necessary to obtain a deeper understanding of the processes involved in their petrogenesis and of their strongly metasomatised mantle sources. Therefore, this data publication doesn’t only provide new geochemical and isotopic data from kamafugites, but a comprehensive data compilation for kamafugite samples in the Western branch of the East Africa Rift (WEAR) in Uganda and Democratic Republic of Congo, the Intra-Apennine Province (IAP), as well as for the Alto Paranaiba (APIP) and Goiás (GAP) provinces in Brazil. 97 kamafugite whole-rock data for the WEAR, 42 for IAP and 51 for APIP and GAP have been collected and compared to highlight similarities and differences, aiming to reconstruct their petrogenesis. The new data in this data publication results from work conducted at Laboratory of Geochronology and Radiogenic Isotope Geochemistry - Pisa1 (IGG-CNR, Italy) supported by WP3 ILGE - MEET project, PNRR - EU Next Generation Europe program, MUR grant number D53C22001400005. Innocenzi, Francesca Dipartimento di Scienze della Terra, Sapienza Università di Roma, Rome, Italy ContactPerson francesca.innocenzi@unipd.it pointOfContact EPOS multi-scale laboratories geochemistry and microscopy geochemistry data Petrology_kalsilite Petrology_ultrapotassic Petrology_mantle metasomatism compound material > igneous material > igneous rock > exotic composition igneous rock > kalsilitic and melilitic rocks compound material > rock > composite genesis rock > metasomatic rock CGI Simple Lithology publication EARTH SCIENCE > SOLID EARTH > GEOCHEMISTRY > GEOCHEMICAL PROPERTIES NASA/GCMD Earth Science Keywords publication CC BY 4.0 CC BY 4.0 10.1016/j.lithos.2012.04.018 DOI References 10.1007/s004100100280 DOI References 10.1016/S0895-9811(01)00079-7 DOI References 10.1016/0016-7037(71)90004-4 DOI References 10.1093/petrology/10.3.536 DOI References https://www.livrosabertos.edusp.usp.br/edusp/catalog/view/6/6/26-1 URL References https://hdl.handle.net/2158/402554 URL References 10.1016/j.chemgeo.2007.04.009 DOI References 10.1180/002646100549652 DOI References 10.1016/j.chemgeo.2008.11.010 DOI References 10.1017/S0080456800004798 DOI References 10.1016/0024-4937(92)90008-M DOI References 10.1007/s007100200004 DOI References https://www.geobrasiliensis.org.br/geobrasiliensis/article/view/73/pdf URL References 10.1180/minmag.1993.057.386.16 DOI References 10.1016/S0024-4937(01)00054-8 DOI References 10.1016/j.gca.2019.03.012 DOI References 10.1016/0012-8252(87)90001-8 DOI References 10.1016/j.chemgeo.2012.06.016 DOI References 10.1130/0016-7606(1954)65[39:teovup]2.0.co;2 DOI References https://earth.geology.yale.edu/~ajs/1945A/313.pdf URL References 10.1017/s0016756800089718 DOI References 10.1180/minmag.1942.026.177.01 DOI References https://pubs.geoscienceworld.org/msa/ammin/article-pdf/35/9-10/772/4244565/am-1950-772.pdf URL References 10.1080/11035893709444967 DOI References 10.1016/j.gr.2023.09.005 DOI References https://etheses.dur.ac.uk/4909/ URL References 10.1016/j.gca.2019.09.041 DOI References 10.1029/2024GC011683 DOI References 10.1016/j.earscirev.2020.103256 DOI References 10.1029/2005jb004224 DOI References 10.3749/canmin.46.1.19 DOI References 10.1007/bf02596917 DOI References 10.1007/BF00402357 DOI References 10.1093/petrology/egad088 DOI References Moraes, L.C., 1984. 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Petrographic analyses have been carried out using a Zeiss Axiophot transmitted polarized light microscope, under plane-polarized light and crossed polars. Micrographs were acquired by means of a digital camera. New isotopic data (Sr-Nd-Pb) have been measured for five Brazilian kamafugites to provide a coherent dataset. The isotope ratios are corrected for in-situ decay using an age of ~80 Ma. We have also performed seven new boron isotope ratios on Italian samples. Sample preparation for the isotopic geochemistry was performed in clean rooms, class 100 for Sr and Pb, and class 1000 for Nd, at the Laboratory of Geochronology and Radiogenic Isotope Geochemistry - Pisa1 (IGG-CNR, Italy). Specific resin (Eichrom for Sr; BioRAD AG MP-50 resin for REE and then Eichrom Ln resin for Nd; Bio-Rad 200-400 mesh AG50W-X8 exchange resin for Pb; ion-exchange resin, 20-50 mesh amberlite, and AG 50 W-X8 cation-exchange resin, 200-400 mesh, for B), in a multi-stage process were used to separate the elements of interest from the matrix. Isotopic analyses (Sr-Nd-Pb and B systematics) were conducted at the Laboratory of Geochronology and Radiogenic Isotope Geochemistry - Pisa1 (IGG-CNR, Italy) using a ThermoFisher Neptune Plus MC-ICP-MS. Measurements were carried out on 2% HNO3 solutions, which include around 20-200 ng/g of analyte. Full analytical details can be found in Agostini et al. (2021, 2022).