Magnus Kristoffersen

• Meintjes, P. G.; Cornell, D. H.; Westhuizen, W. A. Van Der; Kristoffersen, Magnus & Frei, D. (2026). The Goedgenoeg Formation, partition from the Makwassie Formation, Platberg Group, Ventersdorp Supergroup. South African Journal of Geology. ISSN 1012-0750. 129(2), p. 459–482. doi: 10.25131/sajg.129.2805. Full text in Research Archive
• Vestergaard, Rikke; Waight, T.; Petersson, A.; Maas, R.; Hinchey, A. M. & Kristoffersen, Magnus [Show all 8 contributors for this article] (2025). Contemporaneous magnesian (I-type) and ferroan (A-type) magmatism in the Great Proterozoic Accretionary Orogen: Insights from the Julianehåb Igneous Complex, Greenland, and the Adlavik Domain, Labrador, Canada. Lithos. ISSN 0024-4937. 518-519. doi: 10.1016/j.lithos.2025.108287. Full text in Research Archive
• Cornell, D.H.; Meintjes, P.G.; Westhuizen, W.A. van der & Kristoffersen, Magnus (2024). Correlations on the southern Kaapvaal Craton Margin, 1: Ventersdorp lavas transgressed the Doornberg lineament. South African Journal of Geology. ISSN 1012-0750. 127(1), p. 17–30. doi: 10.25131/sajg.127.0007. Full text in Research Archive
• Andersen, Tom; Elburg, M.A.; Kristoffersen, Magnus & Kock, Michiel de (2024). Retrieving meaningful information from detrital zircon in Palaeoproterozoic sedimentary rocks: Provenance, timing of deposition, metamorphism and alteration of zircon in sandstones of the Pretoria Group in the Transvaal Basin, South Africa. South African Journal of Geology. ISSN 1012-0750. 127(2), p. 473–492. doi: 10.25131/sajg.127.0012. Full text in Research Archive
• Cruz, Erika De LA; Müller, Axel; Trumbull, Robert B.; Faria, Pedro; Andersen, Tom & Erambert, Muriel [Show all 7 contributors for this article] (2024). Boron sources of tourmaline-rich Nb-Y-F-pegmatites in south Norway: Implications for pegmatite melt origin. Precambrian Research. ISSN 0301-9268. 410. doi: 10.1016/j.precamres.2024.107474. Full text in Research Archive Show summary

  Tourmaline is common in rare element pegmatites of the Nb-Y-F (NYF) type in the south-central part of the Proterozoic Sveconorwegian orogen in southern Norway. In the global context, however, tourmaline appears rare in this type of pegmatite. This study aims to explain the unusual tourmaline abundance in these pegmatites and the origin of boron (B) in the respective melts, and to raise awareness of tourmaline in NYF pegmatites generally. Tourmalines from six pegmatites in three Sveconorwegian lithotectonic units: Bamble, Kongsberg and Idefjorden, were investigated in terms of their mineral chemistry and δ11B values, in addition to bulk rock analyses of pegmatites and host rocks. Tourmalines in pegmatites from Bamble and Kongsberg record B isotopic compositions (δ11B = -1.0 to + 9.9 ‰) that are heavy relative to continental crust and mantle sources. In contrast, tourmaline in pegmatites and host rocks from Idefjorden have light B isotopic ratios (δ11B = -14.8 to −12.5 ‰) that are typical crustal values. We suggest that the latter melts were sourced from orthogneisses at depth. We relate the heavy B isotopic composition of Bamble and Kongsberg pegmatites to regional Na-metasomatism by fluids sourced from Mesoproterozoic shallow marine sediments. This is supported by previously published δ11B ratios from metasomatized Bamble host rocks. The spatial association of pegmatites with Na-metasomatism in the basement rocks suggests that metasomatism enhanced the fertility and B-concentration in the affected lithologies, favouring partial melting and the formation of tourmaline-bearing pegmatites. These findings contribute to understanding the petrogenesis of Sveconorwegian pegmatites but they also imply that B can play a greater role in the formation of NYF pegmatites than previously thought and that tourmaline has value as a petrogenetic tool in this type of pegmatites as well as in the Li-Cs-Ta (LCT) type to which is it is more commonly applied.

• Cornell, D.H.; Harris, M.; Frei, D.; Mapani, B.; Malobela, T. & Jonsson, A.K. [Show all 8 contributors for this article] (2023). Zircon xenocrysts obscured the zircon date for the lower Koras Group, southern Africa. South African Journal of Geology. ISSN 1012-0750. 126(2), p. 177–194. doi: 10.25131/sajg.126.0009. Full text in Research Archive
• Keyser, William Mark; Müller, Axel; Steiner, Ralf; Erambert, Muriel; Kristoffersen, Magnus & Unterweissacher, Thomas (2023). Alpine eclogite-facies modification of Li-Cs-Ta pegmatite from the Wolfsberg lithium deposit, Austria. Mineralium Deposita. ISSN 0026-4598. 58, p. 1191–1210. doi: 10.1007/s00126-023-01176-w. Full text in Research Archive Show summary

  Abstract The Wolfsberg lithium deposit in Austria is one of the largest Li-Cs-Ta pegmatite resources in Europe. The deposit is part of the Austroalpine Unit Pegmatite Province in the Eastern Alps that formed during the high-temperature, low-pressure Permian extensional event and was subsequently overprinted by Cretaceous eclogite-facies metamorphism during the Alpine orogeny. The two pegmatite types distinguished at the deposit, amphibolite hosted-(AHP) and mica schist hosted-(MHP) pegmatite, consist of quartz, albite, K-feldspar, muscovite and spodumene with accessory apatite, beryl and columbite. Both pegmatite types have similar peraluminous granitic compositions and element distribution patterns. However, the AHP contains higher Li and Cs concentrations. Both pegmatite types display LREE-enriched/HREE-depleted chondrite-normalized REY patterns that suggest derivation from partial melting of basement mica schist during the Permian HT/LP extensional event. The Alpine metamorphism more strongly affected the MHP relative to the AHP, resulting in recrystallization of primary assemblages by metamorphic assemblages with lower rare-metal concentrations, and development of a strong foliation, during which (re)mobilized elements (e.g., Li, Cs) were concentrated along localized shear zones. Recognition of element remobilization in MHP associated with metamorphic overprinting may bear important implications towards mineral exploration for Li-Cs-Ta pegmatite in other strongly metamorphosed terranes.

• Karsli, Orhan; Şengün, Fırat; Dokuz, Abdurrahman; Aydin, Faruk; Kandemir, Raif & Kristoffersen, Magnus [Show all 9 contributors for this article] (2022). Early Cambrian S-type granites in the Sakarya Zone, NE Turkey: A record for transition from subduction to post-collisional extension deduced from U[sbnd]Pb zircon age and Nd[sbnd]Hf isotopes. Lithos. ISSN 0024-4937. 428-429. doi: 10.1016/j.lithos.2022.106809. Full text in Research Archive
• Zhou, Haoyang; Müller, Axel; Augland, Lars Eivind; Kristoffersen, Magnus & Erambert, Muriel (2022). Titanite links rare-element (meta-)pegmatite mineralization to Caledonian metamorphism. Geochimica et Cosmochimica Acta. ISSN 0016-7037. 332, p. 285–306. doi: 10.1016/j.gca.2022.06.014. Full text in Research Archive Show summary

  The metamorphic reworking of mineralized pegmatites during orogenesis remains unclear, making the genesis and the tectonomagmatic significance of pegmatite mineralization obscure. This study demonstrates the multiple utilities of titanite geochemistry in establishing the Caledonian metamorphic evolution of the world’s largest intra-plutonic Nb-Y-F pegmatites in the Paleoproterozoic host rocks in Tysfjord, Northern Norway. A combination of titanite-specific barometry, Zr-in-titanite thermobarometry, and titanite U-Pb geochronology yields peak metamorphism of ∼12 kbar and 730–750 °C at ∼410 Ma for the host rocks and the largest metamorphosed Paleoproterozoic pegmatite (meta-pegmatite) in the region. In relation to published U-Pb ages of 410–400 Ma for other regional meta-pegmatites, interpreted as Caledonian overprinting here, we argue that the Paleoproterozoic pegmatite protoliths have undergone metamorphism analogous to the host rocks, which was caused by allochthonous nappe stacking late in the Caledonian collisional orogeny (∼440–400 Ma). Published formation ages of ∼400–380 Ma for the regional undeformed pegmatites are 10–30 Ma younger than the peak metamorphism, supporting an anatectic link to the Caledonian post-collisional extension. The Caledonian orogeny led to strong shearing of preexisting pegmatite bodies and resetting of trace elements and U-Pb isotopic systems of the constituent minerals via mineral re-crystallization, inheritance of Pb isotopic components, and element diffusion. This cautions against the interpretation of meta-pegmatite-derived ages and geochemical information in tectonomagmatic terranes without detailed textural investigation.

• Brustnitsyna, Ekaterina; Ershova, Victoria; Khudoley, Andrei; Maslov, Andrei; Andersen, Tom & Stockli, Daniel [Show all 7 contributors for this article] (2022). Age and provenance of the Precambrian Middle Timan clastic succession: Constraints from detrital zircon and rutile studies. Precambrian Research. ISSN 0301-9268. 371. doi: 10.1016/j.precamres.2022.106580. Full text in Research Archive
• Cornell, D. H.; Meintjes, P. G.; Westhuizen, W. A. Van der; Kristoffersen, Magnus & Frei, D. (2021). Dating detrital zircon from the gold-bearing Ventersdorp Contact Reef in the Ventersdorp Supergroup of South Africa. Precambrian Research. ISSN 0301-9268. 357. doi: 10.1016/j.precamres.2021.106131. Full text in Research Archive
• Harris, M.; Mapani, B. S.; Cornell, D. H.; Malobela, T.; Weber, B. & Kristoffersen, Magnus [Show all 8 contributors for this article] (2021). Chronostratigraphic correlation of the volcanic 1.21 Ga Barby and Haiber Flats Formations in the Sinclair Supergroup of Namibia. Journal of African Earth Sciences. ISSN 1464-343X. 178. doi: 10.1016/j.jafrearsci.2021.104180. Full text in Research Archive
• Cornell, David H.; Harris, B.; Mapani, B.S.; Malobela, T.; Frei, D. & Kristoffersen, Magnus [Show all 8 contributors for this article] (2020). Dating of Guperas Formation rhyolites changes the stratigraphy of the Mesoproterozoic Sinclair Supergroup of Namibia. South African Journal of Geology. ISSN 1012-0750. 123(4), p. 633–648. doi: 10.25131/sajg.123.0040. Full text in Research Archive
• Czarniecka, Urszula; Haile, Beyene Girma; Braathen, Alvar; Krajewski, Krzysztof P.; Kristoffersen, Magnus & Jokubauskas, Petras (2020). Petrography, geochemistry and U-Pb zircon ages as indicators of provenance: the case of Middle Triassic deposits of the Bravaisberget Formation, Sørkappøya of Svalbard. Norwegian Journal of Geology. ISSN 2387-5844. 100. doi: 10.17850/njg100-3-5. Full text in Research Archive
• Şengün, Firat; Koralay, Osman Ersin & Kristoffersen, Magnus (2020). Zircon U-Pb age and Hf isotopic composition of the Carboniferous Gönen granitoid in the western Sakarya Zone of Turkey. Turkish Journal of Earth Sciences. ISSN 1300-0985. 29(4), p. 617–628. doi: 10.3906/yer-1910-7. Full text in Research Archive Show summary

  The Gönen granitoid is exposed in the western Sakarya Zone and is overlain unconformably by a Jurassic succession. The medium to coarse-grained Gönen granitoid has mineral assemblage of K-feldspar, plagioclase, quartz, muscovite, and biotite. Accessory phases are apatite and zircon. In this study, zircon U-Pb age is combined with Lu-Hf isotopes, which are presented to reveal the magma source and possible petrogenetic processes that took place during the formation of the parental magma for the Gönen granitoid. U-Pb dating of magmatic zircons yielded a concordia age of 336.3 ± 2.9 Ma referring to the early Carboniferous crystallization age of the Gönen granitoid. Magmatic zircons have negative ƐHf(t) values (–3.2 to –8.3), indicating that the granitoid magma was derived from the recycling of ancient crustal materials. TDM model ages vary in the range of 1489–1811 Ma, indicating that the crustal material involved during the early Carboniferous partial melting could be extracted from the mantle or added to the basement of the Sakarya Zone in the Mesoproterozoic/Paleoproterozoic times. Geochronological and Lu-Hf findings point to a collisional setting rather than ongoing subduction during the formation of the early Carboniferous Gönen granitoid.

• Orejana, David; Villaseca, C. & Kristoffersen, Magnus (2020). Geochemistry and geochronology of mafic rocks from the Spanish Central System: constraints on the mantle evolution beneath central Spain. Geoscience Frontiers (GSF). ISSN 1674-9871. 11(5), p. 1651–1667. doi: 10.1016/j.gsf.2020.01.002. Full text in Research Archive Show summary

  The Spanish Central System (SCS) contains several suites of Palaeozoic mafic igneous intrusions with contrasting geochemical affinity: Ordovician tholeiitic metabasites, Variscan calc-alkaline gabbros (Gb1) and microdiorites (Gb2), shoshonitic monzogabbros (Gb3) and alkaline diabases and lamprophyres (Gb4). Not all of these rocks are accurately dated, and several aspects of their genesis are still poorly understood. We present new whole-rock geochemical data (major and trace elements, and Sr–Nd isotopes), U–Pb and Lu–Hf isotopic ratios on magmatic zircons and 40Ar/39Ar amphibole geochronology results in order to establish a precise chronology for the successive events of magmatism in the SCS, and discuss the nature of their mantle sources. Accurate ages have been determined for the Variscan gabbros (305–294 ​Ma), the microdiorites (299 ​Ma) and the accompanying felsic porphyries (292 ​Ma), the shoshonitic monzogabbros (285 ​Ma), and the alkaline diabases (274 ​Ma) and monzosyenites (271–264 ​Ma). According to this information, the Variscan mafic magmatism would be mainly concentrated in the range of 305–294 ​Ma, with a final manifestation represented by the minor shoshonitic dykes. The alkaline magmatism proved to be slightly older than previously thought and yielded at least two distinct pulses: diabases and lamprophyres–monzosyenites. Zircon Hf isotopes evidence the involvement of depleted and slightly enriched mantle sources. The bulk of the εHf values are in the broad range of −8 to +11, indicative of melting both depleted and enriched mantle regions. The high within-sample Hf isotope variation (up to ~11 epsilon units) shown by samples from the Variscan series (gabbros, microdiorites and monzogabbros) could be explained mainly by hybridisation of magmas derived from heterogeneous lithospheric mantle sources. Pressure estimates indicate that the Variscan mafic magmas were extracted from the lithosphere. The Nd–Hf isotopic composition of these suites of rocks suggests the recycling of pelitic sediments during the Cadomian orogeny. Deeper (asthenospheric) mantle levels were involved in the generation of the alkaline suite, whose anomalous negative εHf values (moderately decoupled with respect to radiogenic Nd) could be associated with subducted oceanic components raised by mantle upwelling associated with lithosphere thinning and extension during the Permian.

• Roelofse, F.; Bruiyn, H. de; Cornell, David & Kristoffersen, Magnus (2020). Lithostratigraphy of the Palaeoproterozoic Verena Granite. South African Journal of Geology. ISSN 1012-0750. 123, p. 117–128. doi: 10.25131/sajg.123.0007. Full text in Research Archive
• Czarniecka, Urszula; Haile, Beyene Girma; Braathen, Alvar; Krajewski, Krzysztof P.; Kristoffersen, Magnus & Jokubauskas, Petras (2020). Petrography, bulk-rock geochemistry, detrital zircon U–Pb geochronology and Hf isotope analysis for constraining provenance: An example from Middle Triassic deposits (Bravaisberget Formation), Sørkappøya, Svalbard. Norwegian Journal of Geology. ISSN 2387-5844. doi: 10.17850/njg008. Full text in Research Archive
• Steffenssen, Georg Anthony Wangsmo; Müller, Axel; Munnik, Frans; Friis, Henrik; Erambert, Muriel & Kristoffersen, Magnus [Show all 7 contributors for this article] (2020). Unusual scandium enrichments of the Tørdal pegmatites, south Norway. Part I: Garnet as Sc exploration pathfinder. Ore Geology Reviews. ISSN 0169-1368. 126. doi: 10.1016/j.oregeorev.2020.103729. Full text in Research Archive Show summary

  The granitic pegmatites of Tørdal belong to the Late-Proterozoic Sveconorwegian pegmatite province of south Scandinavia. They form a cluster of about 300 bodies 20 km NW of the town Drangedal in southern Norway and have been known for their Sc enrichment for about 100 years. Scandium is a compatible element in garnet. In this study, 32 garnet samples from 16 pegmatite localities across the Tørdal pegmatite field were investigated to determine the Sc distribution within garnets (crystal scale), within pegmatite bodies (pegmatite scale) and across the Tørdal pegmatite field (regional scale). In the Tørdal pegmatites, Sc content in garnet is representative for the Sc bulk composition of pegmatites, defining garnet as a reliable pathfinder mineral for the exploration of Sc mineralization in pegmatite fields. Garnets with highest Sc concentrations of up to 2197 µg/g have a spessartine component ranging from 50 to 60 mol.%. Since most garnets crystallized during the early stage of pegmatite formation (wall zone stage) Sc decreases in the remaining pegmatite melt, as documented by generally decreasing Sc from core to rim of crystals and by the occurrence of late-stage garnets (albite zone stage) with low Sc. Thus, with progressing crystallization Sc decreases in the melt. The regional Sc distribution in the Tørdal pegmatite field revealed that the Skardsfjell-Heftetjern-Høydalen pegmatites have highest Sc enrichments to sub-economic levels, with an average bulk Sc content of 53 µg/g and an average Sc content in garnet of about 1900 µg/g in the Heftetjern 2 pegmatite. The assumed resources of the Skardsfjell-Heftetjern-Høydalen area are about 125,000 t ore grading c. 50 µg/g Sc resulting in a total of 625 t Sc, which is too small to have economic potential. However, the strong Sc enrichment of the Tørdal pegmatites is unusual for granitic pegmatites, making them a specific Sc deposit type. The amphibolitic host rocks of the Tørdal pegmatites are identified as the source rocks of Sc. The host rocks, which are part of the Nissedal Outlier supracrustals, are enriched in Sc (mean 34 µg/g) compared to average crustal compositions (mean 14 µg/g). Scandium of amphiboles was preferentially released at the onset of partial melting of the amphibolites. Thus, the Sc content in the pegmatite is strongly dependent on the degree of partial melting.

• Meer, Quinten H. A. van der; Scott, James M.; Serre, Simon H.; Whitehouse, Martin J.; Kristoffersen, Magnus & Roux, Petrus J. Le [Show all 7 contributors for this article] (2019). Low-δ18O zircon xenocrysts in alkaline basalts; a window into the complex carbonatite-metasomatic history of the Zealandia lithospheric mantle. Geochimica et Cosmochimica Acta. ISSN 0016-7037. 254, p. 21–39. doi: 10.1016/j.gca.2019.03.029. Full text in Research Archive
• Malobela, T.; Mapani, Ben; Harris, M.; Cornell, David H.; Karlsson, Andreas & Jonsson, Aron Kindbom [Show all 8 contributors for this article] (2019). Age and geological context of the Barby Formation, a key volcanic unit in the Mesoproterozoic Sinclair Supergroup of southern Namibia. South African Journal of Geology. ISSN 1012-0750. 122(4), p. 519–540. doi: 10.25131/sajg.122.0038. Full text in Research Archive
• Andersen, Tom; Kristoffersen, Magnus & Elburg, Marlina Augusta (2018). Visualizing, interpreting and comparing detrital zircon age and Hf isotope datain basin analysis – a graphical approach. Basin Research. ISSN 0950-091X. 30(1), p. 132–147. doi: 10.1111/bre.12245. Full text in Research Archive
• Cornell, David H.; Minnaar, H.; Frei, Dirk & Kristoffersen, Magnus (2018). Precise microbeam dating defines three Archaean granitoid suites at the southwestern margin of the Kaapvaal Craton. Precambrian Research. ISSN 0301-9268. 304, p. 21–38. doi: 10.1016/j.precamres.2017.10.021. Full text in Research Archive Show summary

  Precise microbeam U-Pb zircon dates have been determined for 17 granitoid samples which crop out along the southwestern margin of the Kaapvaal Craton. In the Marydale High two main types of granitoid are distinguished mainly by their normative Quartz – Alkali Feldspar – Plagioclase mineral proportions. The Draghoender Granite type is generally tonalitic to trondhjemitic and some samples have very low heavy Rare Earth Elements, probably originating as melts of eclogitic protoliths. Their ages vary by ∼50 Ma from 2946 ± 9 Ma to 2892 ± 6 Ma (2σ), reflecting a long period of magmatism possibly due to subduction. The granodioritic to monzogranitic Skalkseput Granite type intrudes the Draghoender granite in places and has a coherent age of 2901 ± 14 Ma. These two granite types thus overlap in time and space. The more evolved Skalkseputs type could have been derived by melting of the Draghoender type during assembly of the Kaapvaal Craton by collision of the Kimberley and Witwatersrand Terranes. A third granite type is exemplified by the 2721 ± 6 Ma monzogranitic Steenkop Granite Gneiss which occurs south of Prieskapoort, and corresponds in age to a 2718 ± 8 Ma monzogranite dyke which intrudes a 2871 Ma Skalkseput monzogranite. The previous age of 2718 ± 8 Ma for the Skalkseput Granite probably also dated a Steenkop-type dyke. A basal conglomerate to the Zeekoebaard Formation of the Ventersdorp Supergroup has a single 2720 ± 4 Ma detrital zircon population. South of the Marydale High a narrow strip of Draghoender-type Granite extends to Franzenhof where it is exposed in a Dwyka glacial outwash surface and is dated at 2931 ± 9 Ma. The southernmost exposures of granite are windows in the Dwyka group about 130 km southeast of Marydale on both sides of the Doornberg Fault. The 2905 ± 7 Ma Maritzdam Granite which is basement to Ventersdorp Supergroup volcanic rocks at Kuip is monzogranitic and corresponds to the Skalkseput type. On the southwest side of the Doornberg Fault the 2907 ± 4 Ma Welgevonden Granite underlies Marydale Group volcanic rocks, showing that the Kaapvaal basement extends across the fault.

• Kristoffersen, Magnus; Andersen, Tom; Elburg, Marlina Augusta & Watkeys, Michael K. (2016). Detrital zircon in a supercontinental setting: locally derived and far-transported components in the Ordovician Natal Group, South Africa. Journal of the Geological Society. ISSN 0016-7649. 173, p. 203–215. doi: 10.1144/jgs2015-012. Full text in Research Archive Show summary

  U–Pb and Lu–Hf signatures of detrital zircon from conglomerates and sandstones of the Ordovician Natal Group, South Africa were determined using laser ablation inductively coupled plasma mass spectrometry. The basal conglomerates are dominated by Palaeo- to Mesoarchaean detrital zircon with εHf values from +3 to −4 with minor Mesoproterozoic input, indicating a proximal source in the Kaapvaal Craton and minor input from rocks of the Natal Sector of the Mesoproterozoic Namaqua–Natal Province. The sandstones are all dominated by a combination of juvenile Mesoproterozoic zircon and Neoproterozoic zircon derived from Mesoproterozoic rocks that were reworked during the Pan-African Orogeny. Several sedimentary sequences from former Gondwana with Neoproterozoic to Permian depositional ages show similar detrital zircon signatures. Sedimentary sequences of such vast temporal and geographical distribution are unlikely to have been fed by a single source, making it more likely that these sequences were fed by several different (Pan-Gondwana) source terranes with closely similar U–Pb and Lu–Hf zircon signatures. The results show that source terrane non-uniqueness can make ascertaining sedimentary provenance from detrital zircon impossible, and should be taken as a reminder when using detrital zircon as evidence for far-reaching conclusions in basin evolution studies and palaeogeography. The final version of this research has been published in the Journal of the Geological Society. © 2016 Geological Society

• Andersen, Tom; Kristoffersen, Magnus & Elburg, Marlina Augusta (2016). How far can we trust provenance and crustal evolution information from detrital zircons? A South African case study. Gondwana Research. ISSN 1342-937X. 34, p. 129–148. doi: 10.1016/j.gr.2016.03.003. Full text in Research Archive
• Andresen, Arild; Agyei-Dwarko, Nana Yaw; Kristoffersen, Magnus & Hanken, Nils-Martin (2014). A Timanian foreland basin setting for the late Neoproterozoic - Early Paleozoic cover sequences (Dividal Group) of northeeastern Baltica. Geological Society Special Publication. ISSN 0305-8719. 390, p. 157–175. doi: 10.1144/SP390.29. Full text in Research Archive
• Kristoffersen, Magnus; Andersen, Tom & Andresen, Arild (2014). U–Pb age and Lu–Hf signatures of detrital zircon from Palaeozoic sandstones in the Oslo Rift, Norway. Geological Magazine. ISSN 0016-7568. 151(5), p. 816–829. doi: 10.1017/S0016756813000885. Full text in Research Archive Show summary

  U–Pb and Lu–Hf isotope analyses of detrital zircon from the latest Ordovician (Hirnantian) Langøyene Formation, the Late Silurian Ringerike Group and the Late Carboniferous Asker Group in the Oslo Rift were obtained by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Overall the U–Pb dating yielded ages within the range 2861–313 Ma. The U–Pb age and Lu–Hf isotopic signatures correspond to virtually all known events of crustal evolution in Fennoscandia, as well as synorogenic intrusions from the Norwegian Caledonides. Such temporally and geographically diverse source areas likely reflect multiple episodes of sediment recycling in Fennoscandia, and highlights the intrinsic problem of using zircon as a tracer-mineral in ‘source to sink’ sedimentary provenance studies. In addition to its mostly Fennoscandia-derived detritus, the Asker Group also have zircon grains of Late Devonian – Late Carboniferous age. Since no rocks of these ages are known in Fennoscandia, these zircons are inferred to be derived from the Variscan Orogen of central Europe. The final version of this research has been published in Geological Magazine. © 2014 Cambridge University Press

• Cornell, David; Brander, Linus; Zack, Thomas & Kristoffersen, Magnus (2013). The Plat Sjambok Anorthosite and its tonalitic country rocks: Mesoproterozoic pre-tectonic intrusions in the Kaaien Terrane, Namaqua–Natal Province, southern Africa. International Geology Review. ISSN 0020-6814. 55(12), p. 1471–1489. doi: 10.1080/00206814.2013.780703. Full text in Research Archive

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• Cruz, Erika De La; Müller, Axel; Trumbull, Robert B.; Faria, Pedro; Andersen, Tom & Erambert, Muriel [Show all 7 contributors for this article] (2025). Boron sources of tourmaline-rich Nb-Y-F-pegmatites in south Norway: Implications for pegmatite melt origin. Full text in Research Archive
• Kristoffersen, Magnus; Andersen, Tom; Elburg, Marlina & Watkeys, Michael K. (2015). Pan-Gondwana vs. local sources of detrital zircon in the Ordovician Natal Group, South Africa. Full text in Research Archive
• Lundmark, Anders Mattias; Kristoffersen, Magnus; Thomsen, T; Gillhespy, Lewis & Gabrielsen, Roy H. (2014). Revealing hidden parts of the Caledonian orogen by provenance analysis of Mesozoic sandstones. Full text in Research Archive
• Kristoffersen, Magnus; Andersen, Tom & Andresen, Arild (2014). U-Pb age and Lu-Hf signatures of detrital zircon from Palaezoic sandstones in the Oslo Rift, Norway. Full text in Research Archive
• Kristoffersen, Magnus (2017). U-Pb and Lu-Hf systematics of detrital zircon as a sedimentary provenance indicator. Universitetet i Oslo. Full text in Research Archive
• Lundmark, Anders Mattias; Kristoffersen, Magnus & Gabrielsen, Roy H. (2013). Heavy mineral signatures of Lunde, Statfjord, Nansen and Cook Formation sands, northern North Sea – constraints on origins, mixing patterns and post-depositional alteration. Suncor Energy Norge AS. Full text in Research Archive
• Lundmark, Anders Mattias; Kristoffersen, Magnus & Gabrielsen, Roy H. (2011). Provenance and reservoir heterogeneity in the Banks Group, northern North Sea. Suncor Energy Norge AS. Full text in Research Archive

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