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  1. Contributions to Mineralogy and Petrology
  2. Contributions to Mineralogy and Petrology : Volume 159
  3. Contributions to Mineralogy and Petrology : Volume 159, Issue 6, June 2010
  4. Multiple origins of zircons in jadeitite
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Contributions to Mineralogy and Petrology : Volume 171
Contributions to Mineralogy and Petrology : Volume 170
Contributions to Mineralogy and Petrology : Volume 169
Contributions to Mineralogy and Petrology : Volume 168
Contributions to Mineralogy and Petrology : Volume 167
Contributions to Mineralogy and Petrology : Volume 166
Contributions to Mineralogy and Petrology : Volume 165
Contributions to Mineralogy and Petrology : Volume 164
Contributions to Mineralogy and Petrology : Volume 163
Contributions to Mineralogy and Petrology : Volume 162
Contributions to Mineralogy and Petrology : Volume 161
Contributions to Mineralogy and Petrology : Volume 160
Contributions to Mineralogy and Petrology : Volume 159
Contributions to Mineralogy and Petrology : Volume 159, Issue 6, June 2010
Magmatic evolution of the ultramafic–mafic Kharaelakh intrusion (Siberian Craton, Russia): insights from trace-element, U–Pb and Hf-isotope data on zircon
Multiple origins of zircons in jadeitite
The effect of chrysotile nanotubes on the serpentine-fluid Li-isotopic fractionation
Diffusion and partition coefficients of minor and trace elements in San Carlos olivine at 1,300°C with some geochemical implications
Evidence of a mantle contribution in the genesis of magmatic rocks from the Neogene Batu Hijau district in the Sunda Arc, South Western Sumbawa, Indonesia
Geochemical investigation of a semi-continuous extrusive basaltic section from the Deccan Volcanic Province, India: implications for the mantle and magma chamber processes
Migrating magmatism in the northern US Cordillera: in situ U–Pb geochronology of the Idaho batholith
Geochemical and Sr–O isotopic constraints on magmatic differentiation at Gede Volcanic Complex, West Java, Indonesia
Contributions to Mineralogy and Petrology : Volume 159, Issue 5, May 2010
Contributions to Mineralogy and Petrology : Volume 159, Issue 4, April 2010
Contributions to Mineralogy and Petrology : Volume 159, Issue 3, March 2010
Contributions to Mineralogy and Petrology : Volume 159, Issue 2, February 2010
Contributions to Mineralogy and Petrology : Volume 159, Issue 1, January 2010
Contributions to Mineralogy and Petrology : Volume 158
Contributions to Mineralogy and Petrology : Volume 157
Contributions to Mineralogy and Petrology : Volume 156
Contributions to Mineralogy and Petrology : Volume 155
Contributions to Mineralogy and Petrology : Volume 154
Contributions to Mineralogy and Petrology : Volume 153
Contributions to Mineralogy and Petrology : Volume 152
Contributions to Mineralogy and Petrology : Volume 151
Contributions to Mineralogy and Petrology : Volume 150
Contributions to Mineralogy and Petrology : Volume 149
Contributions to Mineralogy and Petrology : Volume 148
Contributions to Mineralogy and Petrology : Volume 147
Contributions to Mineralogy and Petrology : Volume 146
Contributions to Mineralogy and Petrology : Volume 145
Contributions to Mineralogy and Petrology : Volume 144
Contributions to Mineralogy and Petrology : Volume 143
Contributions to Mineralogy and Petrology : Volume 142
Contributions to Mineralogy and Petrology : Volume 141
Contributions to Mineralogy and Petrology : Volume 140
Contributions to Mineralogy and Petrology : Volume 139
Contributions to Mineralogy and Petrology : Volume 138
Contributions to Mineralogy and Petrology : Volume 137
Contributions to Mineralogy and Petrology : Volume 136
Contributions to Mineralogy and Petrology : Volume 135
Contributions to Mineralogy and Petrology : Volume 134
Contributions to Mineralogy and Petrology : Volume 133
Contributions to Mineralogy and Petrology : Volume 132
Contributions to Mineralogy and Petrology : Volume 131
Contributions to Mineralogy and Petrology : Volume 130
Contributions to Mineralogy and Petrology : Volume 129
Contributions to Mineralogy and Petrology : Volume 128
Contributions to Mineralogy and Petrology : Volume 127
Contributions to Mineralogy and Petrology : Volume 126

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Multiple origins of zircons in jadeitite

Content Provider SpringerLink
Author Fu, Bin Valley, John W. Kita, riko T. Spicuzza, Michael J. Paton, Chad Tsujimori, Tatsuki Bröcker, Michael Harlow, George E.
Copyright Year 2009
Abstract Jadeitites form from hydrothermal fluids during high pressure metamorphism in subduction environments; however, the origin of zircons in jadeitite is uncertain. We report ion microprobe analyses of δ18O and Ti in zircons, and bulk δ18O data for the jadeitite whole-rock from four terranes: Osayama serpentinite mélange, Japan; Syros mélange, Greece; the Motagua Fault zone, Guatemala; and the Franciscan Complex, California. In the Osayama jadeitite, two texturally contrasting groups of zircons are identified by cathodoluminescence and are distinct in δ18O: featureless or weakly zoned zircons with δ18O = 3.8 ± 0.6‰ (2 SD, VSMOW), and zircons with oscillatory or patchy zoning with higher δ18O = 5.0 ± 0.4‰. Zircons in phengite jadeitite from Guatemala and a jadeitite block from Syros have similar δ18O values to the latter from Osayama: Guatemala zircons are 4.8 ± 0.7‰, and the Syros zircons are 5.2 ± 0.5‰ in jadeitite and 5.2 ± 0.4‰ in associated omphacitite, glaucophanite and chlorite-actinolite rinds. The δ18O values for most zircons above fall within the range measured by ion microprobe in igneous zircons from oxide gabbros and plagiogranites in modern ocean crust (5.3 ± 0.8‰) and measured in bulk by laser fluorination of zircons in equilibrium with primitive magma compositions or the mantle (5.3 ± 0.6‰). Titanium concentrations in these zircons vary between 1 and 19 ppm, within the range for igneous zircons worldwide. Values of δ18O (whole-rock) ≅ δ18O (jadeite) and vary from 6.3 to 10.1‰ in jadeitites in all four areas.These values of δ18O and Ti are higher than predicted for hydrothermal zircons, and the δ18O values of most zircons are not equilibrated with the coexisting jadeite at reasonable metamorphic temperatures. We conclude that while some zircons may be hydrothermal in origin, a majority of the zircons studied are best explained as relic igneous crystals inherited from precursor rocks; they were not precipitated directly from hot aqueous fluids as previously assumed. Therefore, U–Pb ages from these zircons may date magmatic crystallization and do not establish the timing of high pressure metamorphism or hydrothermal activity.
Starting Page 769
Ending Page 780
Page Count 12
File Format PDF
ISSN 00107999
Journal Contributions to Mineralogy and Petrology
Volume Number 159
Issue Number 6
e-ISSN 14320967
Language English
Publisher Springer-Verlag
Publisher Date 2009-10-24
Publisher Place Berlin/Heidelberg
Access Restriction One Nation One Subscription (ONOS)
Subject Keyword Zircon Jadeite Hydrothermal Oxygen isotopes SIMS Greece Japan Guatemala California Mineralogy Mineral Resources Geology
Content Type Text
Resource Type Article
Subject Geochemistry and Petrology Geophysics
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