Skip to main content
Article
Licensed
Unlicensed Requires Authentication

Helvine-danalite mineralogy of the Dulong Sn-Zn polymetallic deposit in southeast Yunnan, China

  • , , ORCID logo , and
Published/Copyright: July 27, 2022
Become an author with De Gruyter Brill
Author Information
American Mineralogist
From the journal American Mineralogist Volume 107 Issue 8

Abstract

Southeastern (SE) Yunnan is a major Sn polymetallic province of China, with the Dulong large Sn-Zn polymetallic deposit (in the Laojunshan orefield) being one of the most representative deposits. Our recent work had first identified helvine- group minerals in this deposit. These minerals mainly occur in massive sphalerite ores, and coexist with sphalerite, pyrrhotite, biotite, talc, cassiterite, and fluorite. Raman spectroscopic, X‑ray difraction (XRD), scanning electron microscopic (SEM), and electron probe microanalysis (EPMA) analyses indicate that these helvine-group minerals are oscillatory-zoned helvine-danalite. Both the helvine and danalite zones are mixed with varying proportion of the other helvine-group end-member, and our studies indicate that the oscillatory zoning was formed mainly by periodic fluctuations of the fluid physicochemical conditions (notably fS2 and fO2), but less related to the variation of the fluid Mn, Fe, and Zn contents. The helvine zone was likely formed in a higher fS2 but lower fO2 environment than the danalite zone. In this study, we present the first LA-ICP-MS in situ trace element data for the helvine-danalite minerals from Dulong, and the results indicate that the helvine has considerably high contents and a wide range of trace elements. The helvine is rich in Ca, Al, Sc, and Y, while the danalite is rich in Sn and P (reaching thousands of parts per million). Such trace element enrichments are likely controlled by their respective ionic size and chalcophile behavior.

Meanwhile, the fO2 and fS2 conditions during the zoning formation may have also influenced the trace element distributions: trace elements may have mainly entered the helvine-group minerals by substituting into the M-sites in M4[BeSiO4]3S, for instance Al, Sc, and Y substitute for Mn, and Sn and Mg for Fe and Zn. It is noteworthy that the helvine and danalite zones are all HREE-enriched and have distinct negative Eu anomalies. This may be related to the high fluid F-Y-P contents during the mineral formation. High-F-Y fluids can readily incorporate HREEs into helvine-group minerals, and phosphates incorporate HREEs more readily in alkali fluids. Europium occurs as Eu2+ in the fluid, causing the negative Eu anomalies observed. We have also identified grains of cassiterite in the helvine-group minerals and its coexisting sphalerite. U-Pb dating on these cassiterite grains yielded 86.5 ± 1.6 Ma, coeval with the reported sulfide mineralization age. This indicates that both the Be and Sn-Zn polymetallic mineralization occurred in the Cretaceous, and may have been products of the Late Yanshanian Laojunshan magmatic-hydrothermal activity. Considering the close relations with many W(-Be) deposits nearby (e.g., Nanyangtian, Saxi, and Maka), the Laojunshan orefield may also have substantial Be mineralization potential.

Keywords: Helvine-group minerals; physicochemical environment; major and trace element compositions; LA-ICP-MS; cassiterite U-Pb age; Dulong Sn-Zn polymetallic deposits

Acknowledgments and Funding

We thank the Editor Hongwu Xu, Associate Editor Matthew Steele-Maclnnis, and two anonymous reviewers for their comments on our manuscript, and appreciate the assistance of Yunfeng Liu, Suoqing Zhang, and Qinfu Ye from the Yunan Hualian Zinc and Indium Stock Co. Ltd. in South Yunnan province and Hang Su from Yunnan Hualian Mineral Exploration Co. Ltd. during our fieldwork. We acknowledge Yanwen Tang and Junjie Han from the State Key Laboratory of Ore Deposit Geochemistry (SKLODG), Institute of Geochemistry, Chinese Academy of Sciences (IGCAS) for their assistance in performing the experiments. This study was funded by the National Key R&D Program of China (2016YFC0600503).

References cited

Allegre, C.J., Provost, A., and Jaupart, C. (1981) Oscillatory zoning: A pathological case of crystal growth. Nature, 294, 223–228.10.1038/294223a0Search in Google Scholar

Antao, S.M., and Salvador, J.J. (2019) Crystal chemistry of birefringent uvarovite solid solutions. Minerals, 9, 395.10.3390/min9070395Search in Google Scholar

Bau, M. (1991) Rare-earth element mobility during hydrothermal and metamorphic fluid-rock interaction and the significance of the oxidation state of europium. Chemical Geology, 93, 219–230.10.1016/0009-2541(91)90115-8Search in Google Scholar

Burt, D.M. (1977) Chalcophile-lithophile tendencies in the helvite group: genthelvite stability in the system ZnO–BeO–Al2O3–SiO2–SO–1–F2O–1 (abstract). American Geophysical Union Transactions, 58, 1242.Search in Google Scholar

Burt, D.M. (1980) The stability of danalite, Fe4Be3(SiO4)3S. American Mineralogist, 65, 355–360.Search in Google Scholar

Burt, D.M. (1988) Stability of genthelvite, Zn4(BeSiO4)3S: An exercise in chalcophilicity using exchange operators. American Mineralogist, 73, 1384–1394.Search in Google Scholar

Christy, A.G. (2018) Quantifying lithophilicity, chalcophilicity and siderophilicity. European Journal of Mineralogy, 30, 193–204.10.1127/ejm/2017/0029-2674Search in Google Scholar

Clark, A.M., and Fejer, E.E. (1976) Zoned genthelvite from the Cairngorm Mountains, Scotland. Mineralogical Magazine, 40, 637–639.10.1180/minmag.1976.040.314.11Search in Google Scholar

Deer, W.A., Howie, R.A., Wise, W.S., and Zussman, J. (2004) Rock-forming Minerals, Vol. 4B, Framework silicates. Second ed. The Geological Society of London, 352–368.Search in Google Scholar

Du, S.J., Wen, H.J., Qing, C.J., Yan, Y.F., Yang, G.S., and Feng, P.Y. (2014) Occurrence of beryllium in the Maka Tungsten Polymetallic deposit in Malipo County, Yunnan Province and its significance. Acta Mineralogica Sinica, 34, 446–450 (in Chinese with English abstract).Search in Google Scholar

Dumonceau, J., Bigot, S., Treuil, M., Faucherre, M., and Fromage, F. (1979) Détermination des constantes de formation des tétracarbonatolanthanidates (III). Revue de Chimie Minérale, 16, 583–592.Search in Google Scholar

Dunn, P.J. (1976) Genthelvite and the helvine-group. Mineralogical Magazine, 40, 627–636.10.1180/minmag.1976.040.314.10Search in Google Scholar

Dziggel, A., Wulff, K., Kolb, J., Meyer, F.M., and Lahaye, Y. (2009) Significance of oscillatory and bell-shaped growth zoning in hydrothermal garnet: Evidence from the Navachab gold deposit. Chemical Geology, 262, 262–276.10.1016/j.chemgeo.2009.01.027Search in Google Scholar

Finch, A.A. (1990) Genthelvite and willemite, zinc minerals associated with alkaline magmatism from the Motzfeldt center. Mineralogical Magazine, 54, 407–412.10.1180/minmag.1990.054.376.05Search in Google Scholar

Gaspar, M., Knaack, C., Meinert, L.D., and Moretti, R. (2008) REE in skarn systems: A LA-ICP-MS study of garnets from the Crown Jewel Deposit. Geochimica et Cosmochimica Acta, 72, 185–205.10.1016/j.gca.2007.09.033Search in Google Scholar

Goldschmidt, V.M. (1932) Geochemische Leit-Elemente. Die Naturwissenschaften, 20, 947–948.10.1007/BF01504714Search in Google Scholar

Gramaccioli, C.M., and Pezzotta, F. (2000) Geochemistry of yttrium with respect to the rare-earth elements in pegmatites. Memorie Della Italiana di Scienze e Del Museo Civico di Storia Naturale di Milano XXX, 111–115.Search in Google Scholar

Gramaccioli, C.M., Diella, V., and Demartin, F. (1999) The role of fluoride complexes in REE geochemistry and the importance of 4f electrons: some examples in minerals. European Journal of Mineralogy, 11, 983–992.10.1127/ejm/11/6/0983Search in Google Scholar

Grew, E. S., and Hazen, R.M. (2014) Beryllium mineral evolution. American Mineralogist, 99, 999–1021.10.2138/am.2014.4675Search in Google Scholar

Haapala, I., and Ojanpera, P. (1972) Genthelvite-bearing greisens in southern Finland. Bulletin of the Geological Survey of Finland, 259, 22.Search in Google Scholar

Hassan, I., and Grundy, H.D. (1985) The crystal structures of helvite group minerals, (Mn,Fe,Zn)8(Be6Si6O24)S2. American Mineralogist, 70, 186–192.Search in Google Scholar

He, F., Zhang, Q., Wang, D.P., Liu, Y.P., Ye, L., and Bao, T. (2014) Ore-forming materials sources of the Dulong Sn-Zn polymetallic deposit, Yunnan, evidences from S-C-O stable isotope. Bulletin of Mineralogy, Petrology and Geochemistry, 33, 900–907 (in Chinese with English abstract).Search in Google Scholar

He, F., Zhang, Q., Liu, Y.P., Ye, L., Miao, Y.L., Wang, D.P., Su, H., Bao, T., and Wang, X. J. (2015) Lead isotope compositions of Dulong Sn-Zn polymetallic deposit, Yunnan, China: Constraints on ore-forming metal sources. Acta Mineralogica Sinica, 35, 32–40 (in Chinese with English abstract).Search in Google Scholar

Jamtveit, B., Wogelius, R.A., and Fraser, D. G. (1993) Zonation patterns of skarn garnets: Records of hydrothermal system evolution. Geology, 21, 113–116.10.1130/0091-7613(1993)021<0113:ZPOSGR>2.3.CO;2Search in Google Scholar

Kohn, M.J. (2004) Oscillatory- and sector-zoned garnets record cyclic (?) rapid thrusting in central Nepal. Geochemistry, Geophysics, Geosystems, 5.10.1029/2004GC000737Search in Google Scholar

Kwak, T.A.P., and Jackson, P.G. (1986) The compositional variation and genesis of danalite in Sn–F–W skarns, NW Tasmania, Australia. Neues Jahrbuch für Mineralogie, Monatshefte, 452–462.Search in Google Scholar

Lan, J.B., Liu, Y.P., Ye, L., Zhang, Q., Wang, D.P., and Su, H. (2016) Geochemistry and age spectrum of Late Yanshanian granites from Laojunshan Area, Southeastern Yunnan Province. China. Acta Mineralogica Sinica, 36, 441–454 (in Chinese with English abstract).Search in Google Scholar

Langhof, J., Holtstam, D., and Gustafsson, L. (2000) Chiavennite and zoned genthelvite– helvite as late-stage minerals of the Proterozoic LCT pegmatites at Uto, Stockholm, Sweden. GFF, 122, 207–212.10.1080/11035890001222207Search in Google Scholar

Li, J.K., Wang, D.H., Li, H.Q., Cheng, Z.H., and Mei, Y.P. (2013) Late Jurassic-early Cretaceous mineralization in the Laojunshan ore concentration area, Yunnan province. Earth Science-Journal of China University of Geosciences, 38, 1023–1036 (in Chinese with English abstract).Search in Google Scholar

Li, J.K., Zou, T.R., Wang, D.H., and Ding, X. (2017) A review of beryllium metallogenic regularity in China. Mineral Deposits, 36, 951–978 (in Chinese with English abstract).Search in Google Scholar

Liu, Y.P., Ye, L., Li, C.Y., Song, B., Li, T.S., Guo, L.G., and Pi, D.H. (2006) Discovery of the Neoproterozoic magmatics in southeastern Yunnan: evidence from SHRIMP zircon U-Pb dating and lithogeochemistry. Acta Petrologica Sinica, 22, 916–926 (in Chinese with English abstract).Search in Google Scholar

Liu, Y.P., Li, Z., Li, H., Guo, L., Xu, W., Ye, F., Li, C., and Pi, D. (2007) U-Pb geochronology of cassiterite and zircon from the Dulong deposit: Evidence for Cretaceous large-scale granitic magmatism and mineralization events in southeastern Yunnan Province, China. Acta Petrologica Sinica, 23, 967–976 (in Chinese with English abstract).Search in Google Scholar

Liu, Y.S., Hu, Z.C., Gao, S., Günther, D., Xu, J., Gao, C.G., and Chen, H.H. (2008) In situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard. Chemical Geology, 257, 34–43.10.1016/j.chemgeo.2008.08.004Search in Google Scholar

Liu, Y., Hu, ZChu., Zong, K., Gao, CGui., Gao, S., Xu, J., and Chen, H. (2010) Reappraisement and refinement of zircon U-Pb isotope and trace element analyses by LA-ICP-MS. Chinese Science Bulletin, 55, 1535–1546.10.1007/s11434-010-3052-4Search in Google Scholar

Liu, Y.P., Li, Z.X., Ye, L., Tan, H.Q., and Li, C.Y. (2011) Ar-Ar chronology of tungsten mineralization in Laojunshan ore concentration area. Acta Mineralogica Sinica, 617–618 (in Chinese).Search in Google Scholar

Mineyev, D.A. (1963) Geochemical differentiation of the rare earths. Geochemistry, 1129–1149.Search in Google Scholar

Nimis, P., Molin, G., and Visona, D. (1996) Crystal chemistry of danalite from Daba Shabeli Complex (N Somalia). Mineralogical Magazine, 60, 375–379.10.1180/minmag.1996.060.399.12Search in Google Scholar

Park, C., Song, Y., Kang, I.M., Shim, J., Chung, D., and Park, C.S. (2017) Metasomatic changes during periodic fluid flux recorded in grandite garnet from the Weondong W skarn deposit. Chemical Geology, 451, 135–153.10.1016/j.chemgeo.2017.01.011Search in Google Scholar

Perez, J.B., Dusausoy, Y., Babkine, J., and Pagel, M. (1990) Mn zonation and fluid inclusions in genthelvite from the Taghouaji complex (Air Mountains, Niger). American Mineralogist, 75, 909–914.Search in Google Scholar

Raade, G. (2020) Helvine-group minerals from Norwegian granitic pegmatites and some other granitic rocks: cases of significant Sc and Sn contents. Canadian Mineralogist, 58, 367–379.10.3749/canmin.1900099Search in Google Scholar

Ragu, A. (1994) Helvite from the French Pyrénée as evidence for granite-related hydrothermal activity. Canadian Mineralogist, 32, 111–120.Search in Google Scholar

Raimbault, L., and Bilal, E. (1993) Trace-element contents of helvite-group minerals from metasomatic albitites and hydrothermal veins at Sucuri, Brazil, and Dajishan, China. Canadian Mineralogist, 31, 119–127.Search in Google Scholar

Shannon, R.D. (1976) Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Crystallographica, A32, 751–767.10.1107/S0567739476001551Search in Google Scholar

Shore, M., and Fowler, A.D. (1996) Oscillatory zoning in minerals: A common phenomenon. Canadian Mineralogist, 34, 1111–1126.Search in Google Scholar

Sillen, L.G., and Martell, A.E. (1964) Stability constants of metal-ion complexes. London, Chemical Society, Special publication, Royal Society of Chemistry, no. 17.Search in Google Scholar

Slack, J.F., Meier, A.L., Malcolm, M.J., Fey, D.L., Doughten, M.W., and Wanless, G.A. (2000) Trace element and rare-earth element geochemistry of bedded and massive sulfides from the Sullivan Pb-Zn-Ag deposit, British Columbia—A reconnaissance study. In J.W. Lydon, T. Hoy, J.F. Slack, and M.E. Knapp, Eds., The Geological Environment of the Sullivan Pb-Zn-Ag Deposit, British Columbia. Eological Association of Canada, Mineral Deposits Division, Special Publication, vol. 1, p. 720–735.Search in Google Scholar

Smith, M.P., Henderson, P., Jeffries, T.E.R., Long, J., and Williams, C.T. (2004) The rare earth elements and uranium in garnet from the Beinn an Dubhaich aureole, Skye, Scotland, U.K. Journal of Petrology, 45, 457–484.10.1093/petrology/egg087Search in Google Scholar

Su, H., Wei, W.B., Tao, Z.H., Dao, X.Q., and Li, T. J. (2016) Geological and geochemical characteristics of later Yanshanian concealed granite and its relation with Sn-Zn polymetallic mineralization. Acta Mineralogica Sinica, 36, 488–496 (in Chinese with English abstract).Search in Google Scholar

Sverjensky, D.A. (1984) Europium redox equilibria in aqueous solution. Earth and Planetary Science Letters, 67, 70–78.10.1016/0012-821X(84)90039-6Search in Google Scholar

Taylor, S.R., and McLennan, S.M. (1995) The geochemical evolution of the continental crust. Reviews of Geophysics, 33, 241–265.10.1029/95RG00262Search in Google Scholar

Wang, Y.F., and Merino, E. (1992) Dynamic model of oscillatory zoning of trace elements in calcite: Double layer, inhibition, and self-organization. Geochimica et Cosmochimica Acta, 56, 587–596.10.1016/0016-7037(92)90083-USearch in Google Scholar

Wang, C.Y., Han, R.S., Huang, J.G., Xu, S.H., and Ren, T. (2019) The 40 Ar–39 Ar dating of biotite in ore veins and zircon U-Pb dating of porphyritic granite dyke in the Nanyangtian tungsten deposit in SE Yunnan, China. Ore Geology Reviews, 114, 103133.10.1016/j.oregeorev.2019.103133Search in Google Scholar

Wang, X.J., Liu, Y.P., Miao, Y.L., Bao, T., Ye, L., and Zhang, Q. (2014) In LA-MCICP-MS cassiterite U-Pb dating of Dulong Sn-Zn polymetallic deposit and its significance. Acta Petrologica Sinica, 30, 867–876 (in Chinese with English abstract).Search in Google Scholar

Wood, S.A. (1990) The aqueous geochemistry of the rare-earth elements and yttrium: 2. Theoretical predictions of speciation in hydrothermal solutions to 350 °C at saturation water vapor pressure. Chemical Geology, 88, 99–125.10.1016/0009-2541(90)90106-HSearch in Google Scholar

Xu, B., Jiang, S.Y., Wang, R., Ma, L., Zhao, K.D., and Yan, X. (2015) Late Cretaceous granites from the giant Dulong Sn-polymetallic ore district in Yunnan Province, South China: Geochronology, geochemistry, mineral chemistry and Nd-Hf isotopic compositions. Lithos, 218-219, 54–72.10.1016/j.lithos.2015.01.004Search in Google Scholar

Yan, D.P., Zhou, M.F., Wang, C.Y., and Xia, B. (2006) Structural and geochronological constraints on the tectonic evolution of the Dulong-Song Chay tectonic dome in Yunnan province, SW China. Journal of Asian Earth Sciences, 28, 332–353.10.1016/j.jseaes.2005.10.011Search in Google Scholar

Ye, L., Bao, T., Liu, Y.P., He, F., Wang, X.J., Zhang, Q., Wang, D.P., and Lan, J.B. (2018) The trace and rare elements in scheelites and their implication for mineralization in Dulong Sn-Zn polymetal ore deposit, Yunnan Province. Journal of Nanjing University (Natural Science), 54, 245–258 (in Chinese with English abstract).Search in Google Scholar

Ye, L., Bao, T., Liu, Y.P., Zhang, Q., Wang, X.J., He, F., Wang, D.P., and Lan, J.B. (2016) Mineralization stages and ore-forming fluid of Dulong Sn-Zn polymetal ore deposit, Yunnan Province, China. Acta Mineralogica Sinica, 36, 503–509 (in Chinese with English abstract).Search in Google Scholar

Ye, L., Liu, Y.P., Zhang, Q., Bao, T., He, F., Wang, X.J., Wang, D.P., and Lan, J.B. (2017) Trace and rare elements characteristics of sphalerite in Dulong super large Sn-Zn polymetallic ore deposit, Yunnan province. Journal of Jilin University, Earth Science Edition, 47, 734–750 (in Chinese with English abstract).Search in Google Scholar

Zhang, R., Lehmann, B., Seltmann, R., Li, C., and Sun, W. (2017) Cassiterite U-Pb geochronology constrains magmatic-hydrothermal evolution in complex evolved granite systems: The classic Erzgebirge tin province (Saxony and Bohemia). Geology, 45, 1095–1098.10.1130/G39634.1Search in Google Scholar

Zhang, W.L., Che, X.D., Wang, R.C., Xie, L., Li, X.F., and Zhang, D. (2020) Optimum conditions for quantitative analysis of beryllium by electron probe microanalysis: a case study of beryl. Chinese Science Bulletin, 65, 3205–3216.10.1360/TB-2020-0316Search in Google Scholar

Zhao, Z., Hou, L., Ding, J., Zhang, Q., and Wu, S. (2018) A genetic link between Late Cretaceous granitic magmatism and Sn mineralization in the southwestern South China Block: A case study of the Dulong Sn dominant polymetallic deposit. Ore Geology Reviews, 93, 268–289.10.1016/j.oregeorev.2017.12.020Search in Google Scholar

Zito, G., and Hanson, S.L. (2017) Genthelvite overgrowths on danalite cores from a Pegmatite Miarolitic Cavity in Cheyenne Canyon, El Paso County, Colorado. Canadian Mineralogist, 55, 195–206.10.3749/canmin.1600066Search in Google Scholar
Received: 2020-12-06
Accepted: 2021-07-15
Published Online: 2022-07-27
Published in Print: 2022-08-26

© 2022 Mineralogical Society of America

Articles in the same Issue

  1. Estimating kaolinite crystallinity using near-infrared spectroscopy: Implications for its geology on Earth and Mars
  2. The interplay between twinning and cation inversion in MgAl2O4-spinel: Implications for a nebular thermochronometer
  3. The effect of fluorine on reaction-rim growth dynamics in the ternary CaO-MgO-SiO2 system
  4. Seeing through metamorphic overprints in Archean granulites: Combined high-resolution thermometry and phase equilibrium modeling of the Lewisian Complex, Scotland
  5. Interphase misorientation as a tool to study metamorphic reactions and crystallization in geological materials
  6. Trace element partitioning between olivine and melt in lunar basalts
  7. Solving the iron quantification problem in low-kV EPMA: An essential step toward improved analytical spatial resolution in electron probe microanalysis—Fe-sulfides
  8. Zircon geochronological and geochemical insights into pluton building and volcanic-hypabyssal-plutonic connections: Oki-Dōzen, Sea of Japan—A complex intraplate alkaline volcano
  9. Using cathodoluminescence to identify oscillatory zoning of perthitic K‑feldspar from the equigranular Toki granite
  10. Influence of intensive parameters and assemblies on friction evolution during piston-cylinder experiments
  11. Formation process of Al-rich calcium amphibole in quartz-bearing eclogites from The Sulu Belt, China
  12. Helvine-danalite mineralogy of the Dulong Sn-Zn polymetallic deposit in southeast Yunnan, China
  13. Native gold enrichment process during growth of chalcopyrite-lined conduits within a modern hydrothermal chimney (Manus Basin, PNG)
  14. Pliniusite, Ca5(VO4)3F, a new apatite-group mineral and the novel natural ternary solid-solution system pliniusite–svabite–fluorapatite
  15. Heamanite-(Ce), (K0.5Ce0.5)TiO3, a new perovskite supergroup mineral found in diamond from Gahcho Kué, Canada
  16. A revised analysis of ferrihydrite at liquid helium temperature using Mössbauer spectroscopy
  17. First find of merrillite, Ca3(PO4)2, in a terrestrial environment as an inclusion in lower-mantle diamond
  18. New Mineral Names: Hydrous Minerals
  19. Book Review
  20. Past to Present. (2020) Edited by Beth N. Orcutt, Isabelle Daniel, and Rajdeep Dasgupta.
https://doi.org/10.2138/am-2021-7919
Keywords for this article
Helvine-group minerals; physicochemical environment; major and trace element compositions; LA-ICP-MS; cassiterite U-Pb age; Dulong Sn-Zn polymetallic deposits

Articles in the same Issue

  1. Estimating kaolinite crystallinity using near-infrared spectroscopy: Implications for its geology on Earth and Mars
  2. The interplay between twinning and cation inversion in MgAl2O4-spinel: Implications for a nebular thermochronometer
  3. The effect of fluorine on reaction-rim growth dynamics in the ternary CaO-MgO-SiO2 system
  4. Seeing through metamorphic overprints in Archean granulites: Combined high-resolution thermometry and phase equilibrium modeling of the Lewisian Complex, Scotland
  5. Interphase misorientation as a tool to study metamorphic reactions and crystallization in geological materials
  6. Trace element partitioning between olivine and melt in lunar basalts
  7. Solving the iron quantification problem in low-kV EPMA: An essential step toward improved analytical spatial resolution in electron probe microanalysis—Fe-sulfides
  8. Zircon geochronological and geochemical insights into pluton building and volcanic-hypabyssal-plutonic connections: Oki-Dōzen, Sea of Japan—A complex intraplate alkaline volcano
  9. Using cathodoluminescence to identify oscillatory zoning of perthitic K‑feldspar from the equigranular Toki granite
  10. Influence of intensive parameters and assemblies on friction evolution during piston-cylinder experiments
  11. Formation process of Al-rich calcium amphibole in quartz-bearing eclogites from The Sulu Belt, China
  12. Helvine-danalite mineralogy of the Dulong Sn-Zn polymetallic deposit in southeast Yunnan, China
  13. Native gold enrichment process during growth of chalcopyrite-lined conduits within a modern hydrothermal chimney (Manus Basin, PNG)
  14. Pliniusite, Ca5(VO4)3F, a new apatite-group mineral and the novel natural ternary solid-solution system pliniusite–svabite–fluorapatite
  15. Heamanite-(Ce), (K0.5Ce0.5)TiO3, a new perovskite supergroup mineral found in diamond from Gahcho Kué, Canada
  16. A revised analysis of ferrihydrite at liquid helium temperature using Mössbauer spectroscopy
  17. First find of merrillite, Ca3(PO4)2, in a terrestrial environment as an inclusion in lower-mantle diamond
  18. New Mineral Names: Hydrous Minerals
  19. Book Review
  20. Past to Present. (2020) Edited by Beth N. Orcutt, Isabelle Daniel, and Rajdeep Dasgupta.
Downloaded on 1.5.2026 from https://www.degruyterbrill.com/document/doi/10.2138/am-2021-7919/html?lang=en
Scroll to top button