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Jonsson, Erik
Publications (10 of 64) Show all publications
Andersson, S. S., Wagner, T., Jonsson, E., Fusswinkel, T. & Whitehouse, M. J. (2019). Apatite as a tracer of the source, chemistry and evolution of ore-forming fluids: The case of the Olserum-Djupedal REE-phosphate mineralisation, SE Sweden. Geochimica et Cosmochimica Acta, 255, 163-187
Open this publication in new window or tab >>Apatite as a tracer of the source, chemistry and evolution of ore-forming fluids: The case of the Olserum-Djupedal REE-phosphate mineralisation, SE Sweden
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2019 (English)In: Geochimica et Cosmochimica Acta, ISSN 0016-7037, E-ISSN 1872-9533, Vol. 255, p. 163-187Article in journal (Refereed) Published
Abstract [en]

This study explores the suitability of apatite as a tracer of the source(s), chemistry, and evolution of ore-forming hydrothermal fluids. This is tested by analysing the halogen (F, Cl, Br, and I), stable Cl isotopic, and trace element compositions of fluorapatite from the regional-scale Olserum-Djupedal rare earth element (REE) phosphate mineralisation in SE Sweden, which is dominated by monazite-(Ce), xenotime-(Y), and fluorapatite. The primary hydrothermal fluid flow system is recorded in a sequence from proximal granite-hosted to distal metasediment-hosted fluorapatite. Along this sequence, primary fluorapatite shows a gradual increase of Cl and Br concentrations and in (Gd/Yb)(N), a decrease of F and I concentrations, a decrease in delta Cl-37 values, in (La/Sm)(N), and partly in (La/Yb)(N) and (Y/Ho)(N). Local compositional differences of halogen and trace element concentrations have developed along rims and in domains adjacent to fractures of fluorapatite due to late-stage partial reaction with fracture fluids. These differences are insignificant compared to the larger deposit-scale zoning. This suggests that apatite can retain the primary record of the original ore-forming fluid despite later overprinting fluid events. The agreement between Br/Cl and I/Cl ratios of apatite and those of co-existing fluid inclusions at lower temperatures indicates that only a minor fractionation of Br from I occurs during apatite precipitation. The halogen ratios of apatite can thus be used as a first-order estimate for the composition of the ore-forming fluid. Taking the small fractionation factors for Cl isotopes between apatite and co-existing fluid at high temperatures into account, we propose that the Cl isotopic composition of apatite and the halogen ratios derived from the apatite composition can be used jointly to trace the source(s) of ore-forming fluids. By contrast, most trace elements incorporated in apatite are affected by the host rock environment and by fluid-mineral partitioning due to growth competition between co-crystallising minerals. Collectively, apatite is sensitive to changing fluid compositions, yet it is also able to record the character of primary ore-forming fluids. Thus, apatite is suitable for tracing the origin, chemistry, and evolution of fluids in hydrothermal ore-forming settings.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD, 2019
Keywords
Olserum, REE, Apatite, Fluid tracer, Halogens, Stable Cl isotopes
National Category
Geology Geochemistry
Identifiers
urn:nbn:se:uu:diva-385956 (URN)10.1016/j.gca.2019.04.014 (DOI)000468170500009 ()
Funder
The Geological Survey of Sweden (SGU)Academy of Finland, 280458
Available from: 2019-06-19 Created: 2019-06-19 Last updated: 2019-06-19Bibliographically approved
Troll, V. R., Weis, F. A., Jonsson, E., Andersson, U. B., Majidi, S. A., Högdahl, K., . . . Nilsson, K. P. (2019). Global Fe-O isotope correlation reveals magmatic origin of Kiruna-type apatite-iron-oxide ores. Nature Communications, 10, Article ID 1712.
Open this publication in new window or tab >>Global Fe-O isotope correlation reveals magmatic origin of Kiruna-type apatite-iron-oxide ores
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2019 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 10, article id 1712Article in journal (Refereed) Published
Abstract [en]

Kiruna-type apatite-iron-oxide ores are key iron sources for modern industry, yet their origin remains controversial. Diverse ore-forming processes have been discussed, comprising lowtemperature hydrothermal processes versus a high-temperature origin from magma or magmatic fluids. We present an extensive set of new and combined iron and oxygen isotope data from magnetite of Kiruna-type ores from Sweden, Chile and Iran, and compare them with new global reference data from layered intrusions, active volcanic provinces, and established low-temperature and hydrothermal iron ores. We show that approximately 80% of the magnetite from the investigated Kiruna-type ores exhibit d56Fe and d18O ratios that overlap with the volcanic and plutonic reference materials (> 800 degrees C), whereas similar to 20%, mainly vein-hosted and disseminated magnetite, match the low-temperature reference samples (<= 400 degrees C). Thus, Kiruna-type ores are dominantly magmatic in origin, but may contain latestage hydrothermal magnetite populations that can locally overprint primary hightemperature magmatic signatures.

Place, publisher, year, edition, pages
NATURE PUBLISHING GROUP, 2019
National Category
Geology
Identifiers
urn:nbn:se:uu:diva-382552 (URN)10.1038/s41467-019-09244-4 (DOI)000464338100023 ()30979878 (PubMedID)
Funder
Swedish Research Council
Available from: 2019-05-10 Created: 2019-05-10 Last updated: 2019-05-10Bibliographically approved
Sahlström, F., Jonsson, E., Högdahl, K., Troll, V. R., Harris, C., Jolis, E. M. & Weis, F. (2019). Interaction between high-temperature magmatic fluids and limestone explains 'Bastnäs-type' REE deposits in central Sweden. Scientific Reports, 9, Article ID 15203.
Open this publication in new window or tab >>Interaction between high-temperature magmatic fluids and limestone explains 'Bastnäs-type' REE deposits in central Sweden
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2019 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 9, article id 15203Article in journal (Refereed) Published
Abstract [en]

The presently increasing demand for rare earth elements (REE), particularly in high-tech and "green energy" applications, has led to global interest in the distribution, origins and formation conditions of REE deposits. The World's first hard-rock REE sources, the polymetallic deposits of Bastnasfaltet in Bergslagen, central Sweden, were also the place of the original discovery of several REE and many of their host minerals. Similar deposits with high concentrations of REE occur along a >100 km corridor in the region and they share a number of geological and mineralogical features; all comprising Palaeoproterozoic, skarn-hosted magnetite-REE mineralisation of ambiguous origin. Here we report oxygen isotope data for magnetite and quartz, and oxygen and carbon isotope data for carbonates from ten of these classic deposits, to model and assess their mode of origin. Combined with existing geological observations, the isotope results support an origin in a c. 1.9 Ga shallow-marine back-arc, sub-seafloor setting, where felsic magmatic-sourced, high-temperature fluids reacted with pre-existing limestone interlayers, leading to localised skarn formation and magnetite-REE-mineral precipitation. These findings help us to better understand the geological processes that have produced economic REE mineralisation and may assist future exploration for these critical commodities.

Place, publisher, year, edition, pages
Nature Publishing Group, 2019
National Category
Geology
Identifiers
urn:nbn:se:uu:diva-399091 (URN)10.1038/s41598-019-49321-8 (DOI)000491859400008 ()31645579 (PubMedID)
Funder
Swedish Research CouncilThe Geological Survey of Sweden (SGU)
Available from: 2019-12-16 Created: 2019-12-16 Last updated: 2019-12-16Bibliographically approved
Jonsson, E. & Högdahl, K. (2019). On the occurrence of gallium and germanium in the Bergslagen ore province, Sweden. GFF, 141(1), 48-53
Open this publication in new window or tab >>On the occurrence of gallium and germanium in the Bergslagen ore province, Sweden
2019 (English)In: GFF, ISSN 1103-5897, E-ISSN 2000-0863, Vol. 141, no 1, p. 48-53Article in journal (Refereed) Published
Abstract [en]

The presence of the critical and sought-after (semi-)metals gallium (Ga) and germanium (Ge) has previously been reported from mineralisations in the Bergslagen ore province, south central Sweden. Some of these reports were however recently shown to be questionable or erroneous. Here we summarise early analytical work on these metals in mineral deposits of the Bergslagen province, as well as briefly report new analytical data for Ga and Ge from recent, in part on-going work on different mineralisation types. The new data show that the sampled sulphide and iron oxide mineralisations in the Bergslagen province are overall not particularly enriched in Ga, and even less so with regards to Ge. One major exception is the significant Ga enrichment observed in skarn-hosted Fe-REE(-polymetallic) deposits of Bastnas type. Notably, these mineralisations also host increased contents of Ge. Based on this broader suite of sampled deposits, the suggested correlation between Ga and Al contents in previously studied material with relatively increased Ga grades, is in part contradicted, indicating that Ga is only in part sequestered through straightforward Al-substitution into aluminium silicate and oxide minerals. The mineralisations that do exhibit significantly increased Ge contents, in addition to the Bastnas-type deposits, are represented by both sulphide-dominated ones and Fe (-Mn) oxide-rich systems.

Place, publisher, year, edition, pages
TAYLOR & FRANCIS LTD, 2019
Keywords
Gallium, germanium, Bergslagen, mineralisation, Sweden
National Category
Geology
Identifiers
urn:nbn:se:uu:diva-385583 (URN)10.1080/11035897.2018.1525619 (DOI)000467182600004 ()
Funder
Swedish Research Council
Available from: 2019-06-17 Created: 2019-06-17 Last updated: 2019-06-17Bibliographically approved
Högdahl, K., Jonsson, E., Roško, S., Wlodek, A., Zack, T., Landström, E., . . . Bacalis, V. (2019). Ore mineralogy, trace element distribution and 3D X-ray tomography of the polymetallic sulphide deposits at Mavres Petres and Piavitsa, Greece. In: LIFE WITH ORE DEPOSITS ON EARTH, PROCEEDINGS OF THE 15TH SGA BIENNIAL MEETING, 2019, VOLS 1-4: . Paper presented at 15th SGA Biennial Meeting on Life with Ore Deposits on Earth, AUG 27-30, 2019, Univ Glasgow, Glasgow, SCOTLAND (pp. 279-282). SOC GEOLOGY APPLIED MINERAL DEPOSITS-SGA, 1
Open this publication in new window or tab >>Ore mineralogy, trace element distribution and 3D X-ray tomography of the polymetallic sulphide deposits at Mavres Petres and Piavitsa, Greece
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2019 (English)In: LIFE WITH ORE DEPOSITS ON EARTH, PROCEEDINGS OF THE 15TH SGA BIENNIAL MEETING, 2019, VOLS 1-4, SOC GEOLOGY APPLIED MINERAL DEPOSITS-SGA , 2019, Vol. 1, p. 279-282Conference paper, Published paper (Refereed)
Abstract [en]

The Mavres Petres mine, operated by Hellas Gold, and the Piavitsa prospect are both located along the Stratoni fault in the Kassandra mining district, northern Greece. These Tertiary deposits are brecciated, carbonate replacement Pb-Zn-Ag-(Au) mineralisations and the Piavitsa deposit is also associated with Au-rich epithermal veins. Both mineralisations were variably overprinted by later fluids as well as ductile and brittle deformation affecting ore mineralogy and trace element distribution. Galena is the main Ag-carrier, contains significant concentrations of Sb and Bi and is locally associated with a suite of Sb-As-Bi phases. Sphalerite is either massive or occurs as a later cockade-textured type. Both varieties are variably enriched in Mn and can exhibit elevated concentrations of In and Ga. In Piavitsa, alabandite is present as small euhedral crystals or in veins in fractured sphalerite. Pyrite is ubiquitous and is either present as disseminations, massive to skeletal aggregates or as a matrix in breccias. It is often arsenic-bearing and even more so towards the later stages. Arsenopyrite appears to be a late phase and occurs interstitial to pyrite and as euhedral crystals. While both arsenopyrite and arsenian pyrite can be enriched in Au, As-minerals are not necessarily associated with Au.

Place, publisher, year, edition, pages
SOC GEOLOGY APPLIED MINERAL DEPOSITS-SGA, 2019
National Category
Geology
Identifiers
urn:nbn:se:uu:diva-403028 (URN)000503111600072 ()9780852619629 (ISBN)
Conference
15th SGA Biennial Meeting on Life with Ore Deposits on Earth, AUG 27-30, 2019, Univ Glasgow, Glasgow, SCOTLAND
Funder
EU, Horizon 2020, 73027
Available from: 2020-01-24 Created: 2020-01-24 Last updated: 2020-01-24Bibliographically approved
Sahiström, F., Jonsson, E., Högdahl, K., Ghaderidosst, J., Luth, S., Lynch, E., . . . Sädbom, S. (2019). Textural evolution of the Lovisa Zn-Pb-(Ag) deposit, Bergslagen, Sweden: insights from microscopy and 3D X-ray tomography. In: LIFE WITH ORE DEPOSITS ON EARTH, PROCEEDINGS OF THE 15TH SGA BIENNIAL MEETING, 2019, VOLS 1-4: . Paper presented at 15th SGA Biennial Meeting on Life with Ore Deposits on Earth, AUG 27-30, 2019, Univ Glasgow, Glasgow, SCOTLAND (pp. 443-446). SOC GEOLOGY APPLIED MINERAL DEPOSITS-SGA, 1
Open this publication in new window or tab >>Textural evolution of the Lovisa Zn-Pb-(Ag) deposit, Bergslagen, Sweden: insights from microscopy and 3D X-ray tomography
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2019 (English)In: LIFE WITH ORE DEPOSITS ON EARTH, PROCEEDINGS OF THE 15TH SGA BIENNIAL MEETING, 2019, VOLS 1-4, SOC GEOLOGY APPLIED MINERAL DEPOSITS-SGA , 2019, Vol. 1, p. 443-446Conference paper, Published paper (Refereed)
Abstract [en]

The presently mined Lovisa deposit constitutes a c. 1.9 Ga, stratiform Zn-Pb-(Ag) sulphide mineralisation hosted by rhyolite-dominated meta volcanic rocks in the Bergslagen ore province, south central Sweden. The mineralised rock sequence at Lovisa has been subjected to polyphase ductile deformation, amphibolite facies regional metamorphism, and late-stage brittle deformation. The combined effects of these processes have produced a diversity of post-genetic ore textures within the sulphide horizons, including metablastic growth, piercements, ductile and brittle sulphide deformation, and durchbewegung and 'ball ore' textures. Here we report on the character and textural evolution of the Lovisa deposit in conjunction with regional metamorphism and deformation, utilising new data from ore- and electron microscopy combined with 3D tomography by means of novel XRT-XRF drill core scanning technique.

Place, publisher, year, edition, pages
SOC GEOLOGY APPLIED MINERAL DEPOSITS-SGA, 2019
National Category
Geology
Identifiers
urn:nbn:se:uu:diva-403025 (URN)000503111600114 ()9780852619629 (ISBN)
Conference
15th SGA Biennial Meeting on Life with Ore Deposits on Earth, AUG 27-30, 2019, Univ Glasgow, Glasgow, SCOTLAND
Funder
EU, Horizon 2020, 73027
Available from: 2020-01-27 Created: 2020-01-27 Last updated: 2020-01-27Bibliographically approved
Bowles, J. F. W., Cook, N. J., Sundblad, K., Jonsson, E., Deady, E. & Hughes, H. S. R. (2018). Critical-metal mineralogy and ore genesis: contributions from the European Mineralogical Conference held in Rimini, September 2016. Mineralogical magazine, 82, S1-S4
Open this publication in new window or tab >>Critical-metal mineralogy and ore genesis: contributions from the European Mineralogical Conference held in Rimini, September 2016
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2018 (English)In: Mineralogical magazine, ISSN 0026-461X, E-ISSN 1471-8022, Vol. 82, p. S1-S4Article in journal, Editorial material (Other academic) Published
National Category
Geochemistry
Identifiers
urn:nbn:se:uu:diva-366841 (URN)10.1180/minmag.2017.081.110 (DOI)000435650000001 ()
Funder
The Geological Survey of Sweden (SGU)
Available from: 2018-12-03 Created: 2018-12-03 Last updated: 2018-12-03Bibliographically approved
Skoda, R., Plasil, J., Copjakova, R., Novak, M., Jonsson, E., Galiova, M. V. & Holtstam, D. (2018). Gadolinite-(Nd), a new member of the gadolinite supergroup from Fe-REE deposits of Bastnäs-type, Sweden. Mineralogical magazine, 82(Suppl. 1), S133-S145
Open this publication in new window or tab >>Gadolinite-(Nd), a new member of the gadolinite supergroup from Fe-REE deposits of Bastnäs-type, Sweden
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2018 (English)In: Mineralogical magazine, ISSN 0026-461X, E-ISSN 1471-8022, Vol. 82, no Suppl. 1, p. S133-S145Article in journal (Refereed) Published
Abstract [en]

A new member of the gadolinite supergroup, gadolinite-(Nd), IMA2016-013, ideally Nd2FeBe2Si2O10, was found in the Malmkarra mine, similar to 3.5km WSW of Norberg, south-central Sweden, where it occurs in association with fluorbritholite-(Ce), vastmanlandite-(Ce), dollaseite-(Ce), bastnasite-(Ce) and tremolite. Gadolinite-(Nd) forms anhedral grains up to 150 mu m in size, commonly occurring as aggregates of olive green colour. The crystals are transparent with vitreous to adamantine lustre. Gadolinite-(Nd) is brittle with conchoidal fracture, no cleavage or parting was observed. It has a white streak, the Mohs hardness is 6.5-7 and the calculated density is 4.86gcm(-3). Optically, the mineral is weakly pleochroic in shades of olive green, biaxial (-), n=1.78(1), n((calc.))=1.80, n=1.81(1) measured in white light, 2V((meas.))=62(3)degrees. Electron-microprobe and laser ablation inductively coupled plasma mass spectrometry analysis [in wt.%] provided SiO2 21.77, Y2O3 5.49, La2O3 2.78, Ce-2 O-3 14.04, Pr2O3 3.28, Nd2O3 19.27, Sm2O3 5.30, Eu2O3 0.24, Gd2O3 4.10, Tb2O3 0.36, Dy2O3 1.32, Ho2O3 0.18, Er2O3 0.38, MgO 0.51, CaO 0.14, MnO 0.10, FeO 10.62, B2O3 0.10, BeOcalc. 8.99, H2Ocalc. 0.55 and total 99.52 giving the following empirical formula (based on 2 Si): (Nd0.632Ce0.472Y0.268Sm0.168Gd0.125Pr0.110La0.094Dy0.039Ca0.014Er0.011Tb0.011Eu0.008Ho0.008)(Sigma 1.957)(Fe0.816Mg0.070Mn0.008)(Sigma 0.894)(Be1.984B0.016)(Sigma 2.000)Si2O9.660OH0.337. A weak Raman vibration band at similar to 3525cm(-1) confirms the presence of water in the structure. Gadolinite-(Nd) is monoclinic, P2(1)/c, with a=4.8216(3) angstrom, b=7.6985(4) angstrom, c=10.1362(6) angstrom, beta =90.234(4)degrees, V=376.24(6) angstrom(3) and Z=2. The strongest X-ray diffraction lines are [d(obs) in angstrom (hkl) I-rel]: 4.830 (100) 72, 3.603 (021) 37, 3.191(-112) 52, 3.097 (013) 35, 2.888 (121) 100, 2.607(113) 49, 2.412 (200) 24. Along with the Malmkarra mine, gadolinite-(Nd) was also recorded also at Johannagruvan and Nya Bastnas. The minerals of the gadolinite subgroup together with fluorbritholite-(Ce) incorporate the highest fraction of medium-to-heavy rare-earth elements among associated rare-earth element minerals in the Malmkarra mine and possibly in all Bastnas-type deposits.

Place, publisher, year, edition, pages
MINERALOGICAL SOC, 2018
Keywords
gadolinite-(Nd), rare-earth elements, new mineral, crystal structure, Malmkarra, Bastnas-type deposits
National Category
Geochemistry
Identifiers
urn:nbn:se:uu:diva-359667 (URN)10.1180/minmag.2017.081.047 (DOI)000435650000007 ()
Funder
Swedish Research CouncilThe Geological Survey of Sweden (SGU)
Available from: 2018-09-05 Created: 2018-09-05 Last updated: 2018-09-05Bibliographically approved
Siidra, O. I., Jonsson, E., Chukanov, N. V., Nekrasova, D. O., Pekov, I. V., Depmeier, W., . . . Yapaskurt, V. O. (2018). Grootfonteinite, Pb3O(CO3)(2), a new mineral species from the Kombat Mine, Namibia, merotypically related to hydrocerussite. European journal of mineralogy, 30(2), 383-391
Open this publication in new window or tab >>Grootfonteinite, Pb3O(CO3)(2), a new mineral species from the Kombat Mine, Namibia, merotypically related to hydrocerussite
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2018 (English)In: European journal of mineralogy, ISSN 0935-1221, E-ISSN 1617-4011, Vol. 30, no 2, p. 383-391Article in journal (Refereed) Published
Abstract [en]

Grootfonteinite, Pb3O(CO3)(2), is a new Pb oxycarbonate found in a mineralogically complex, banded assemblage from the Mn (-Fe) oxide ore unit of the Kombat mine. Grootfonteinite is named after the locality in the Grootfontein district. The mineral forms platy grains up to 1 mm across and up to 0.2 mm thick included in and intergrown with massive cerussite. Grootfonteinite is colourless, with white streak and adamantine lustre. It is brittle with perfect cleavage on (0 0 1). The density calculated using the empirical formula H0.345Na0.275Ca0.045Pb2.645C2O7 is 6.856 g.cm(-3). The strongest five reflections in the X-ray powder-diffraction pattern [(d in angstrom)-(Intensity)-(hkl)] are: 4.586-25-0 1 0, 3.244-100-0 1 3, 2.652-30-1 1 0, 2.294-21-0 2 0, 2.053-39-0 2 3. Grootfonteinite crystallizes in space group P6(3)/mmc (No. 194), a = 5.303(1), c = 13.770(3) angstrom, v= 335.3(1) angstrom(3), Z= 2. The crystal structure of grootfonteinite is formed by layered blocks which consist of sheets with composition [PbCO3] and (ideally) [PbO], the stacking of which can be described as center dot center dot center dot-[PbCO3]-[PbO]-[PbCO3]-center dot center dot center dot The composition of the resulting electroneutral 2D block is {[Pb-2(CO3)(2)][(Pb0.7Na0.3)(O-0.7(OH)(0.3))]}(0). The stereochemically active 6S(2) lone electron pairs of the two Pb atoms are located in between the blocks, resembling the classical case of the structure of litharge. Grootfonteinite is structurally related to hydrocerussite, abellaite, and plumbonacrite. A characteristic structural feature of all these minerals is the presence of [PbCO3](0) sheets in the upper and lower parts of invariably electroneutral 2D blocks, the middle part being variable. The topology of 2D blocks in the crystal structure of grootfonteinite can be considered as intermediate between those of abellaite and hydrocerussite. These three minerals can be considered to form a merotype family. Other members of this family can be hypothesized which differ in the nature of the interleaved sheets.

Place, publisher, year, edition, pages
E SCHWEIZERBARTSCHE VERLAGSBUCHHANDLUNG, 2018
Keywords
grootfonteinite, carbonate, lead, hydrocerussite, abellaite, layered structure, new mineral, Kombat mine
National Category
Inorganic Chemistry
Identifiers
urn:nbn:se:uu:diva-365842 (URN)10.1127/ejm/2018/0030-2723 (DOI)000444631000018 ()
Available from: 2018-11-27 Created: 2018-11-27 Last updated: 2018-11-27Bibliographically approved
Grew, E. S., Jonsson, E. & Langhof, J. (2018). Lithium-200 Years: Symposium and Field Trip June 14-16, 2018. Elements, 14(4), 284-284
Open this publication in new window or tab >>Lithium-200 Years: Symposium and Field Trip June 14-16, 2018
2018 (English)In: Elements, ISSN 1811-5209, E-ISSN 1811-5217, Vol. 14, no 4, p. 284-284Article in journal, Editorial material (Other academic) Published
Place, publisher, year, edition, pages
Mineralogical Society of America, 2018
National Category
Climate Research
Identifiers
urn:nbn:se:uu:diva-370055 (URN)10.2138/gselements.14.4.284 (DOI)000448617200009 ()
Available from: 2018-12-20 Created: 2018-12-20 Last updated: 2018-12-20Bibliographically approved
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