Home The distribution and abundance of halogens in eclogites: An in situ SIMS perspective of the Raspas Complex (Ecuador)
Article
Licensed
Unlicensed Requires Authentication

The distribution and abundance of halogens in eclogites: An in situ SIMS perspective of the Raspas Complex (Ecuador)

  • Benjamin M. Urann ORCID logo , Véronique Le Roux , Timm John , Grace M. Beaudoin and Jaime D. Barnes
Published/Copyright: March 1, 2020
Become an author with De Gruyter Brill
Author Information
American Mineralogist
From the journal American Mineralogist Volume 105 Issue 3

Abstract

We present in situ secondary ion mass spectrometry (SIMS) and electron microprobe analyses of coexisting garnet, omphacite, phengite, amphibole, and apatite, combined with pyrohydrolysis bulk-rock analyses to constrain the distribution, abundance, and behavior of halogens (F and Cl) in six MORB-like eclogites from the Raspas Complex (Southern Ecuador). In all cases concerning lattice-hosted halogens, F compatibility decreases from apatite (1.47–3.25 wt%), to amphibole (563–4727 μg/g), phengite (610–1822 μg/g), omphacite (6.5–54.1 μg/g), and garnet (1.7–8.9 μg/g). The relative compatibility of Cl in the assemblage is greatest for apatite (192–515 μg/g), followed by amphibole (0.64–82.7 μg/g), phengite (1.2–2.1 μg/g), omphacite (<0.05–1.0 μg/g), and garnet (<0.05 μg/g). Congruence between SIMS-reconstructed F bulk abundances and yield-corrected bulk pyrohydrolysis analyses indicates that F is primarily hosted within the crystal lattice of eclogitic minerals. However, SIMS-reconstructed Cl abundances are a factor of five lower, on average, than pyrohydrolysis-derived bulk concentrations. This discrepancy results from the contribution of fluid inclusions, which may host at least 80% of the bulk rock Cl. The combination of SIMS and pyrohydrolysis is highly complementary. Whereas SIMS is well suited to determine bulk F abundances, pyrohydrolysis better quantifies bulk Cl concentrations, which include the contribution of fluid inclusion-hosted Cl. Raspas eclogites contain 145–258 μg/g F and at least 7–11 μg/g Cl. We estimate that ~95% of F is retained in the slab through eclogitization and returned to the upper mantle during subduction, whereas at least 95% of subducted Cl is removed from the rock by the time the slab equilibrates at eclogite facies conditions. Our calculations provide further evidence for the fractionation of F from Cl during high-pressure metamorphism in subduction zones. Although the HIMU (high U/Pb) mantle source (dehydrated oceanic crust) is often associated with enrichments in Cl/K and F/Nd, Raspas eclogites show relatively low halogen ratios identical within uncertainty to depleted MORB mantle (DMM). Thus, the observed halogen enrichments in HIMU ocean island basalts require either further fractionation during mantle processing or recycling of a halogen-enriched carrier lithology such as serpentinite into the mantle.

Keywords: Eclogite; halogens; subduction; SIMS; nominally anhydrous minerals; HIMU; Halogens in Planetary Bodies

Acknowledgments and Funding

We thank two anonymous reviewers for their insights and suggestions, which improved the manuscript. This research was supported by NSF award EAR-P&G no. 1524311 and no. 1839128 to VLR. B.M.U. acknowledges the support of the WHOI Ocean Venture Fund. This work was also supported by NSF-PIRE grant (OIA-1545903) to J.D.B.

References cited

Anderson, A.T., and Greenland, L.P. (1969) Phosphorus fractionation diagram as a quantitative indicator of crystallization differentiation of basaltic liquids. Geochimica et Cosmochimica Acta, 33, 493–505.10.1016/0016-7037(69)90129-XSearch in Google Scholar

Armstrong, J.T. (1995) CITZAF—a package of correction programs for the quantitative electron microbeam X‑ray analysis of thick polished materials, thin films, and particles. Microbeam Analysis, 177–200.Search in Google Scholar

Barnes, J.D., and Cisneros, M. (2012) Mineralogical control on the chlorine isotope composition of altered oceanic crust. Chemical Geology, 326-327, 51–60.10.1016/j.chemgeo.2012.07.022Search in Google Scholar

Barnes, J.D., Manning, C.E., Scambelluri, M., and Selverstone, J. (2018) The Behavior of Halogens During Subduction-Zone Processes. In D.E. Harlov, Ed., The Role of Halogens in Terrestrial and Extraterrestrial Geochemical Processes, 263, pp. 545–590. Springer.10.1007/978-3-319-61667-4_8Search in Google Scholar

Beinlich, A., Klemd, R., John, T., and Gao, J. (2010) Trace-element mobilization during Ca-metasomatism along a major fluid conduit: Eclogitization of blueschist as a consequence of fluid–rock interaction. Geochimica et Cosmochimica Acta, 74, 1892–1922.10.1016/j.gca.2009.12.011Search in Google Scholar

Beyer, C., Klemme, S., Grützner, T., Ireland, T.R., Magee, C.W., and Frost, D.J. (2016) Fluorine partitioning between eclogitic garnet, clinopyroxene, and melt at upper mantle conditions. Chemical Geology, 437, 88–97.10.1016/j.chemgeo.2016.05.032Search in Google Scholar

Cabral, R.A., Jackson, M.G., Koga, K.T., Rose-Koga, E.F., Hauri, E.H., Whitehouse, M.J., Price, A.A., Day, J.M.D., Shimizu, N., and Kelley, K.A. (2014) Volatile cycling of H2O, CO2, F, and Cl in the HIMU mantle: A new window provided by melt inclusions from oceanic hot spot lavas at Mangaia, Cook Islands. Geochemistry, Geophysics, Geosystems, 15, 4445–4467.10.1002/2014GC005473Search in Google Scholar

Chase, C.G. (1981) Oceanic island Pb: Two-stage histories and mantle evolution. Earth and Planetary Science Letters, 52, 277–284.10.1016/0012-821X(81)90182-5Search in Google Scholar

Chavrit, D., Burgess, R., Sumino, H., Teagle, D.A.H., Droop, G., Shimizu, A., and Ballentine, C.J. (2016) The contribution of hydrothermally altered ocean crust to the mantle halogen and noble gas cycles. Geochimica et Cosmochimica Acta, 183, 106–124.10.1016/j.gca.2016.03.014Search in Google Scholar

Dalou, C., Koga, K.T., Le Voyer, M., and Shimizu, N. (2014) Contrasting partition behavior of F and Cl during hydrous mantle melting: implications for Cl/F signature in arc magmas. Progress in Earth and Planetary Science, 1, 26.10.1186/s40645-014-0026-1Search in Google Scholar

Debret, B., Koga, K.T., Cattani, F., Nicollet, C., Van den Bleeken, G., and Schwartz, S. (2016) Volatile (Li, B, F and Cl) mobility during amphibole breakdown in subduction zones. Lithos, 244, 165–181.10.1016/j.lithos.2015.12.004Search in Google Scholar

Feininger, T. (1980) Eclogite and related high-pressure regional metamorphic rocks from the Andes of Ecuador. Journal of Petrology, 21, 107–140.10.1093/petrology/21.1.107Search in Google Scholar

Feininger, T. (1987) Allochthonous terranes in the Andes of Ecuador and northwestern Peru. Canadian Journal of Earth Sciences, 24, 266–278.10.1139/e87-028Search in Google Scholar

Freundt, A., Grevemeyer, I., Rabbel, W., Hansteen, T.H., Hensen, C., Wehrmann, H., Kutterolf, S., Halama, R., and Frische, M. (2014) Volatile (H2O, CO2, Cl, S) budget of the Central American subduction zone. International Journal of Earth Sciences, 103, 2101–2127.10.1007/s00531-014-1001-1Search in Google Scholar

Gabriele, P. (2002) HP terranes exhumation in an active margin setting: geology, petrology and geochemistry of the Raspas Complex in SW Ecuador. Ph.D. thesis, University of Lausanne, Switzerland.Search in Google Scholar

Gale, A., Dalton, C.A., Langmuir, C.H., Su, Y., and Schilling, J.G. (2013) The mean composition of ocean ridge basalts. Geochemistry, Geophysics, Geosystems, 14, 489–518.10.1029/2012GC004334Search in Google Scholar

Gao, J., and Klemd, R. (2001) Primary fluids entrapped at blueschist to eclogite transition: evidence from the Tianshan meta-subduction complex in northwestern China. Contributions to Mineralogy and Petrology, 142, 1–14.10.1007/s004100100275Search in Google Scholar

Halama, R., John, T., Herms, P., Hauff, F., and Schenk, V. (2011) A stable (Li, O) and radiogenic (Sr, Nd) isotope perspective on metasomatic processes in a subducting slab. Chemical Geology, 281, 151–166.10.1016/j.chemgeo.2010.12.001Search in Google Scholar

Hanyu, T., Shimizu, K., Ushikubo, T., Kimura, J.-I., Chang, Q., Hamada, M., Ito, M., Iwamori, H., and Ishikawa, T. (2019) Tiny droplets of ocean island basalts unveil Earth’s deep chlorine cycle. Nature Communications, 10, 222.10.1038/s41467-018-07955-8Search in Google Scholar

Herms, P., John, T., Bakker, R. J., and Schenk, V. (2012) Evidence for channelized external fluid flow and element transfer in subducting slabs (Raspas Complex, Ecuador). Chemical Geology, 310-311, 79–96.10.1016/j.chemgeo.2012.03.023Search in Google Scholar

Hofmann, A.W., and White, W.M. (1982) Mantle plumes from ancient oceanic crust. Earth and Planetary Science Letters, 57, 421–436.10.1016/0012-821X(82)90161-3Search in Google Scholar

Hughes, L., Burgess, R., Chavrit, D., Pawley, A., Tartèse, R., Droop, G., Ballentine, C.J., and Lyon, I. (2018) Halogen behaviour in subduction zones: Eclogite facies rocks from the Western and Central Alps. Geochimica et Cosmochimica Acta, 243, 1–23.10.1016/j.gca.2018.09.024Search in Google Scholar

Imai, N., Terashima, S., Itoh, S., and Ando, A. (1995) 1994 Complilation of Analyitical Data for Minor and Trace Elements in Seventeen GSJ Geochemical Reference Samples, “Igneous Rock Series.” Geostandards and Geoanalytical Research, 19, 135–213.10.1111/j.1751-908X.1995.tb00158.xSearch in Google Scholar

Ito, E., Harris, D.M., and Anderson, A.T. (1983) Alteration of oceanic crust and geologic cycling of chlorine and water. Geochimica et Cosmochimica Acta, 47, 1613–1624.10.1016/0016-7037(83)90188-6Search in Google Scholar

Jackson, M.G., Koga, K.T., Price, A., Konter, J.G., Koppers, A.A.P., Finlayson, V.A., Konrad, K., Hauri, E.H., Kylander-Clark, A., Kelley, K.A., and Kendrick, M.A. (2015) Deeply dredged submarine HIMU glasses from the Tuvalu Islands, Polynesia: implications for volatile budgets of recycled oceanic crust. Geochemistry, Geophysics, Geosystems, 16, 3210–3234.10.1002/2015GC005966Search in Google Scholar

Joachim, B., Pawley, A., Lyon, I.C., Marquardt, K., Henkel, T., Clay, P.L., Ruzié, L., Burgess, R., and Ballentine, C.J. (2015) Experimental partitioning of F and Cl between olivine, orthopyroxene and silicate melt at Earth’s mantle conditions. Chemical Geology, 416, 65–78.10.1016/j.chemgeo.2015.08.012Search in Google Scholar

John, T., and Schenk, V. (2003) Partial eclogitisation of gabbroic rocks in a late Precambrian subduction zone (Zambia): prograde metamorphism triggered by fluid infiltration. Contributions to Mineralogy and Petrology, 146, 174–191.10.1007/s00410-003-0492-8Search in Google Scholar

John, T., Scambelluri, M., Frische, M., Barnes, J.D., and Bach, W. (2011) Dehydration of subducting serpentinite: Implications for halogen mobility in subduction zones and the deep halogen cycle. Earth and Planetary Science Letters, 308, 65–76.10.1016/j.epsl.2011.05.038Search in Google Scholar

John, T., Scherer, E.E., Schenk, V., Herms, P., Halama, R., and Garbe-Schönberg, D. (2010) Subducted seamounts in an eclogite-facies ophiolite sequence: the Andean Raspas Complex, SW Ecuador. Contributions to Mineralogy and Petrology, 159, 265–284.10.1007/s00410-009-0427-0Search in Google Scholar

Kendrick, M.A. (2018) Halogens in seawater, marine sediments and the altered oceanic lithosphere. In D.E. Harlov, Ed., The Role of Halogens in Terrestrial and Extraterrestrial Geochemical Processes, 87, pp. 591–648. Springer.10.1007/978-3-319-61667-4_9Search in Google Scholar

Kendrick, M.A. (2019a) Halogens in altered ocean crust from the East Pacific Rise (ODP/IODP Hole 1256D). Geochimica et Cosmochimica Acta, 261, 93–112.10.1016/j.gca.2019.06.044Search in Google Scholar

Kendrick, M.A. (2019b) Halogens in Atlantis Bank gabbros, SW Indian Ridge: Implications for styles of seafloor alteration. Earth and Planetary Science Letters, 514, 96–107.10.1016/j.epsl.2019.02.034Search in Google Scholar

Kendrick, M.A., Jackson, M. G., Kent, A.J.R., Hauri, E.H., Wallace, P.J., and Woodhead, J. (2014) Contrasting behaviours of CO2, S, H2O and halogens (F, Cl, Br, and I) in enriched-mantle melts from Pitcairn and Society seamounts. Chemical Geology, 370, 69–81.10.1016/j.chemgeo.2014.01.019Search in Google Scholar

Kendrick, M.A., Honda, M., and Vanko, D.A. (2015) Halogens and noble gases in Mathematician Ridge meta-gabbros, NE Pacific: implications for oceanic hydrothermal root zones and global volatile cycles. Contributions to Mineralogy and Petrology, 170, 173.10.1007/s00410-015-1192-xSearch in Google Scholar

Kendrick, M.A., Hémond, C., Kamenetsky, V.S., Danyushevsky, L., Devey, C.W., Rodemann, T., Jackson, M. G., and Perfit, M.R. (2017) Seawater cycled throughout Earth’s mantle in partially serpentinized lithosphere. Nature Geoscience, 10, 222–228.10.1038/ngeo2902Search in Google Scholar

Konzett, J., and Frost, D.J. (2009) The high P–T stability of hydroxyl-apatite in natural and simplified MORB—an experimental study to 15 GPa with implications for transport and storage of phosphorus and halogens in subduction zones. Journal of Petrology, 50, 2043–2062.10.1093/petrology/egp068Search in Google Scholar

Kumamoto, K.M., Warren, J.M., and Hauri, E.H. (2017) New SIMS reference materials for measuring water in upper mantle minerals. American Mineralogist, 102, 537–547.10.1130/abs/2016AM-281063Search in Google Scholar

Kusebauch, C., John, T., Whitehouse, M.J., and Engvik, A.K. (2015) Apatite as probe for the halogen composition of metamorphic fluids (Bamble Sector, SE Norway). Contributions to Mineralogy and Petrology, 170, 271.10.1007/s00410-015-1188-6Search in Google Scholar

Le Voyer, M., Cottrell, E., Kelley, K.A., Brounce, M., and Hauri, E.H. (2015) The effect of primary versus secondary processes on the volatile content of MORB glasses: An example from the equatorial Mid-Atlantic Ridge (5°N–3°S). Journal of Geophysical Research: Solid Earth, 120, 125–144.10.1002/2014JB011160Search in Google Scholar

Le Voyer, M., Hauri, E.H., Cottrell, E., Kelley, K.A., Salters, V.J.M., Langmuir, C.H., Hilton, D.R., Barry, P.H., and Füri, E. (2019) Carbon fluxes and primary magma CO2 contents along the global mid-ocean ridge system. Geochemistry, Geophysics, Geosystems, 20(3), 1387–1424.10.1029/2018GC007630Search in Google Scholar

Locock, A.J. (2014) An Excel spreadsheet to classify chemical analyses of amphiboles following the IMA 2012 recommendations. Computers & Geosciences, 62, 1–11.10.1016/j.cageo.2013.09.011Search in Google Scholar

Marschall, H.R., Altherr, R., Gméling, K., and Kasztovszky, Z. (2009) Lithium, boron and chlorine as tracers for metasomatism in high-pressure metamorphic rocks: a case study from Syros (Greece). Mineralogy and Petrology, 95, 291–302.10.1007/s00710-008-0032-3Search in Google Scholar

Maruyama, S., Liou, J.G., and Terabayashi, M. (1996) Blueschists and eclogites of the world and their exhumation. International Geology Review, 38, 485–594.10.1080/00206819709465347Search in Google Scholar

Massonne, H.J. (2012) Formation of amphibole and clinozoisite–epidote in eclogite owing to fluid infiltration during exhumation in a subduction channel. Journal of Petrology, 53, 1969–1998.10.1093/petrology/egs040Search in Google Scholar

Massonne, H.J., and Schreyer, W. (1987) Phengite geobarometry based on the limiting assemblage with K-feldspar, phlogopite, and quartz. Contributions to Mineralogy and Petrology, 96, 212–224.10.1007/BF00375235Search in Google Scholar

Mather, T.A., Pyle, D.M., Tsanev, V.I., McGonigle, A.J.S., Oppenheimer, C., and Allen, A.G. (2006) A reassessment of current volcanic emissions from the Central American arc with specific examples from Nicaragua. Journal of Volcanology, 149, 297–311.10.1016/j.jvolgeores.2005.07.021Search in Google Scholar

Niu, Y., and O’Hara, M. J. (2003) Origin of ocean island basalts: A new perspective from petrology, geochemistry, and mineral physics considerations. Journal of Geophysical Research: Solid Earth, 108, 63.10.1029/2002JB002048Search in Google Scholar

Pagé, L., Hattori, K., and Guillot, S. (2018) Mantle wedge serpentinites: A transient reservoir of halogens, boron, and nitrogen for the deeper mantle. Geology, 46, 883–886.10.1130/G45204.1Search in Google Scholar

Pagé, L., Hattori, K., de Hoog, J.C.M., and Okay, A.I. (2016) Halogen (F, Cl, Br, I) behaviour in subducting slabs: A study of lawsonite blueschists in western Turkey. Earth and Planetary Science Letters, 442, 133–142.10.1016/j.epsl.2016.02.054Search in Google Scholar

Philippot, P., and Selverstone, J. (1991) Trace-element-rich brines in eclogitic veins: implications for fluid composition and transport during subduction. Contributions to Mineralogy and Petrology, 106, 417–430.10.1007/BF00321985Search in Google Scholar

Philippot, P., Agrinier, P., and Scambelluri, M. (1998) Chlorine cycling during subduction of altered oceanic crust. Earth and Planetary Science Letters, 161, 33–44.10.1016/S0012-821X(98)00134-4Search in Google Scholar

Pyle, D.M., and Mather, T.A. (2009) Halogens in igneous processes and their fluxes to the atmosphere and oceans from volcanic activity: A review. Chemical Geology, 263, 110–121.10.1016/j.chemgeo.2008.11.013Search in Google Scholar

Rebay, G., Powell, R., and Diener, J.F.A. (2010) Calculated phase equilibria for a morb composition in a P-T range, 450–650 °C and 18–28 kbar: the stability of eclogite. Journal of Metamorphic Geology, 28, 635–645.10.1111/j.1525-1314.2010.00882.xSearch in Google Scholar

Rose-Koga, E.F., Koga, K.T., Schiano, P., Le Voyer, M., Shimizu, N., Whitehouse, M.J., and Clocchiatti, R. (2012) Mantle source heterogeneity for South Tyrrhenian magmas revealed by Pb isotopes and halogen contents of olivine-hosted melt inclusions. Chemical Geology, 334, 266–279.10.1016/j.chemgeo.2012.10.033Search in Google Scholar

Rose-Koga, E.F., Koga, K.T., Moreira, M., Vlastelic, I., Jackson, M.G., Whitehouse, M.J., Shimizu, N., and Habib, N. (2017) Geochemical systematics of Pb isotopes, fluorine, and sulfur in melt inclusions from São Miguel, Azores. Chemical Geology, 458, 22–37.10.1016/j.chemgeo.2017.03.024Search in Google Scholar

Sadofsky, S.J., Portnyagin, M., Hoernle, K., and van den Bogaard, P. (2008) Subduction cycling of volatiles and trace elements through the Central American volcanic arc: evidence from melt inclusions. Contributions to Mineralogy and Petrology, 155, 433–456.10.1007/s00410-007-0251-3Search in Google Scholar

Salters, V.J.M., and Stracke, A. (2004) Composition of the depleted mantle. Geochemistry, Geophysics, Geosystems, 5.10.1029/2003GC000597Search in Google Scholar

Scambelluri, M., and Philippot, P. (2001) Deep fluids in subduction zones. Lithos, 55, 213–227.10.1016/S0024-4937(00)00046-3Search in Google Scholar

Schmidt, M.W., and Poli, S. (1998) Experimentally based water budgets for dehydrating slabs and consequences for arc magma generation. Earth and Planetary Science Letters, 163, 361–379.10.1016/S0012-821X(98)00142-3Search in Google Scholar

Schnetger, B., and Muramatsu, Y. (1996) Determination of halogens, with special reference to iodine, in geological and biological samples using pyrohydrolysis for preparation and inductively coupled plasma mass spectrometry and ion chromatography for measurement. The Analyst, 121, 1627.10.1039/an9962101627Search in Google Scholar PubMed

Shimizu, K., Saal, A.E., Myers, C.E., Nagle, A.N., Hauri, E.H., Forsyth, D.W., Kamenetsky, V.S., and Niu, Y. (2016) Two-component mantle melting-mixing model for the generation of mid-ocean ridge basalts: Implications for the volatile content of the Pacific upper mantle. Geochimica et Cosmochimica Acta, 176, 44–80.10.1016/j.gca.2015.10.033Search in Google Scholar

Shu, Y., Nielsen, S.G., Marschall, H.R., John, T., Blusztajn, J., and Auro, M. (2019) Closing the loop: Subducted eclogites match thallium isotope compositions of ocean island basalts. Geochimica et Cosmochimica Acta, 250, 130–148.10.1016/j.gca.2019.02.004Search in Google Scholar

Stormer, J.C., and Pierson, M. (1993) Variation of F and Cl X‑ray intensity due to anisotropic diffusion in apatite during electron microprobe analysis. American Mineralogist, 78, 641–648.Search in Google Scholar

Straub, S.M., and Layne, G.D. (2003) The systematics of chlorine, fluorine, and water in Izu arc front volcanic rocks: Implications for volatile recycling in subduction zones. Geochimica et Cosmochimica Acta, 67, 4179–4203.10.1016/S0016-7037(03)00307-7Search in Google Scholar

Stroncik, N.A., and Haase, K.M. (2004) Chlorine in oceanic intraplate basalts: Constraints on mantle sources and recycling processes. Geology, 32, 945.10.1130/G21027.1Search in Google Scholar

Svensen, H., Jamtveit, B., Banks, D.A., and Austrheim, H. (2001) Halogen contents of eclogite facies fluid inclusions and minerals: Caledonides, western Norway. Journal of Metamorphic Geology, 19, 165–178.10.1046/j.0263-4929.2000.00301.xSearch in Google Scholar

Turcotte, D.L., and Schubert, G. (2002) Geodynamics by Donald L. Turcotte, 2nd ed. Cambridge University Press.10.1017/CBO9780511807442Search in Google Scholar

Urann, B.M., Le Roux, V., Hammond, K., Marschall, H.R., Lee, C.T.A., and Monteleone, B.D. (2017) Fluorine and chlorine in mantle minerals and the halogen budget of the Earth’s mantle. Contributions to Mineralogy and Petrology, 172, 324.10.1007/s00410-017-1368-7Search in Google Scholar

Van den Bleeken, G., and Koga, K.T. (2015) Experimentally determined distribution of fluorine and chlorine upon hydrous slab melting, and implications for F–Cl cycling through subduction zones. Geochimica et Cosmochimica Acta, 171, 353–373.10.1016/j.gca.2015.09.030Search in Google Scholar

Watson, E. (1979) Apatite saturation in basic to intermediate magmas. Geophysical Research Letters, 6(12), 937–940.10.1029/GL006i012p00937Search in Google Scholar

Zack, T., Rivers, T., and Foley, S. (2001) Cs–Rb–Ba systematics in phengite and amphibole: an assessment of fluid mobility at 2.0 GPa in eclogites from Trescolmen, Central Alps. Contributions to Mineralogy and Petrology, 140, 651–669.10.1007/s004100000206Search in Google Scholar

Zindler, A., Jagoutz, E., and Goldstein, S. (1982) Nd, Sr and Pb isotopic systematics in a three-component mantle: a new perspective. Nature, 298, 519–523.10.1038/298519a0Search in Google Scholar
Received: 2019-02-07
Accepted: 2019-11-10
Published Online: 2020-03-01
Published in Print: 2020-03-26

© 2020 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

  1. Heavy halogen geochemistry of martian shergottite meteorites and implications for the halogen composition of the depleted shergottite mantle source
  2. The distribution and abundance of halogens in eclogites: An in situ SIMS perspective of the Raspas Complex (Ecuador)
  3. Pressure dependence of Si diffusion in γ-Fe
  4. Seismic detectability of carbonates in the deep Earth: A nuclear inelastic scattering study
  5. Equations of state, phase relations, and oxygen fugacity of the Ru-RuO2 buffer at high pressures and temperatures
  6. Experimental determination of the phase relations of Pt and Pd antimonides and bismuthinides in the Fe-Ni-Cu sulfide systems between 1100 and 700 °C
  7. Layer stacking disorder in Mg-Fe chlorites based on powder X-ray diffraction data
  8. Elasticity of single-crystal Fe-enriched diopside at high-pressure conditions: Implications for the origin of upper mantle low-velocity zones
  9. XANES spectroscopy of sulfides stable under reducing conditions
  10. Zircon and apatite geochemical constraints on the formation of the Huojihe porphyry Mo deposit in the Lesser Xing’an Range, NE China
  11. Textural and compositional evolution of iron oxides at Mina Justa (Peru): Implications for mushketovite and formation of IOCG deposits
  12. Siwaqaite, Ca6Al2(CrO4)3(OH)12·26H2O, a new mineral of the ettringite group from the pyrometamorphic Daba-Siwaqa complex, Jordan
  13. Negevite, the pyrite-type NiP2, a new terrestrial phosphide
  14. Transjordanite, Ni2P, a new terrestrial and meteoritic phosphide, and natural solid solutions barringerite-transjordanite (hexagonal Fe2P–Ni2P)
https://doi.org/10.2138/am-2020-6994
Keywords for this article
Eclogite; halogens; subduction; SIMS; nominally anhydrous minerals; HIMU; Halogens in Planetary Bodies

Articles in the same Issue

  1. Heavy halogen geochemistry of martian shergottite meteorites and implications for the halogen composition of the depleted shergottite mantle source
  2. The distribution and abundance of halogens in eclogites: An in situ SIMS perspective of the Raspas Complex (Ecuador)
  3. Pressure dependence of Si diffusion in γ-Fe
  4. Seismic detectability of carbonates in the deep Earth: A nuclear inelastic scattering study
  5. Equations of state, phase relations, and oxygen fugacity of the Ru-RuO2 buffer at high pressures and temperatures
  6. Experimental determination of the phase relations of Pt and Pd antimonides and bismuthinides in the Fe-Ni-Cu sulfide systems between 1100 and 700 °C
  7. Layer stacking disorder in Mg-Fe chlorites based on powder X-ray diffraction data
  8. Elasticity of single-crystal Fe-enriched diopside at high-pressure conditions: Implications for the origin of upper mantle low-velocity zones
  9. XANES spectroscopy of sulfides stable under reducing conditions
  10. Zircon and apatite geochemical constraints on the formation of the Huojihe porphyry Mo deposit in the Lesser Xing’an Range, NE China
  11. Textural and compositional evolution of iron oxides at Mina Justa (Peru): Implications for mushketovite and formation of IOCG deposits
  12. Siwaqaite, Ca6Al2(CrO4)3(OH)12·26H2O, a new mineral of the ettringite group from the pyrometamorphic Daba-Siwaqa complex, Jordan
  13. Negevite, the pyrite-type NiP2, a new terrestrial phosphide
  14. Transjordanite, Ni2P, a new terrestrial and meteoritic phosphide, and natural solid solutions barringerite-transjordanite (hexagonal Fe2P–Ni2P)
Sign up now to receive a 20% welcome discount
Institutional Access
How does access work?
Have an idea on how to improve our website?
Please write us.
© 2025 De Gruyter Brill
Downloaded on 23.9.2025 from https://www.degruyterbrill.com/document/doi/10.2138/am-2020-6994/html?lang=en
Scroll to top button