Jadeitites and Plate Tectonics

Harlow, George E.; Tsujimori, Tatsuki; Sorensen, Sorena S.

doi:10.1146/annurev-earth-060614-105215

Cited by 94 publications

(95 citation statements)

References 101 publications

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“…Jadeitite is rigorously used for a rock containing more than 75% jadeite (cf. Harlow et al, 2015), and albitite is used for a rock containing more than 75% albite. In this area, however, modal abundances of jadeite and albite sometimes vary from place to place at hand specimen scales.…”

Section: Classification Of Jadeitite and Albitite For Petrogenetic Comentioning

confidence: 99%

“…The jadeitite of this area was once considered as metasomatic remnant of jadeite-quartz rocks (e.g., Shido, 1958;Chihara, 1971), formed during the high P/T type metamorphism of~300 Ma (Banno, 1958;Tsujimori, 2002;Kunugiza et al, 2004;Matsumoto et al, 2011). However, this jadeitite is also considered to be hydrothermal in origin (Miyajima et al, 1999;Kunugiza et al, 2000;Morishita et al, 2007;Harlow et al, 2015). Tsujimori and Harlow (2012) proposed that the jadeitite of this area consists of both P-and R-types, with the latter being based on the presence of large amphibole laths in omphacite-bearing jadeitite.…”

Section: Introductionmentioning

confidence: 99%

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Phase relation in the NaAlSiO4–SiO2–H2O system for the hydrothermal precipitation of jadeite, albite, natrolite, and analcime in jadeitite of the Itoigawa–Omi area, Japan

Goto

Kunugiza

Matsubara

2017

Journal of Mineralogical and Petrological Sciences

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Jadeitite from the Itoigawa-Omi area in the Hida-Gaien belt is hydrothermal in origin, occurring as tectonic blocks in a serpentinite mélange. Most jadeitite shows bimineralic mineralogy essentially composed of jadeite and albite without quartz. It sometimes has veins and cavities filled with zeolite-bearing assemblages of natrolite-jadeite and analcime-jadeite. In veins and cavities, jadeite often shows euhedral shapes in natrolite and analcime matrices and accompanies Sr-Ti-Zr-bearing new minerals such as itoigawaite, rengeite, and matsubaraite. Phase relation in the NaAlSiO 4 -SiO 2 -H 2 O system has been analyzed based on the Schreinemakers' rule to explain the hydrothermal origin of these jadeitites and the euhedral form of jadeite. The albite-and natrolitejadeitites were precipitated from a hydrothermal fluid in the pressure-temperature field surrounded by the following four reactions: 1) albite = jadeite + quartz, 2) natrolite = nepheline + jadeite + 2 water, 3) natrolite + albite = 3 jadeite + 2 water, and 4) analcime = jadeite + water. Jadeite and analcite seem to be in equilibrium because of their euhedral shapes, but never crystallize from a fluid phase in the NaAlSiO 4 -SiO 2 -H 2 O system. To explain the presence of euhedral jadeite in an analcime matrix, we propose two possible interpretations: 1) that the introduction of evolved, multicomponent, hydrothermal fluid becomes the fluid-analcime-jadeite triangle and appears in a pseudo-ternary system and 2) that hydrothermal fluid was present in an amount insufficient to form a water-saturated, analcime-bearing assemblage.

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Section: Classification Of Jadeitite and Albitite For Petrogenetic Comentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phase relation in the NaAlSiO4–SiO2–H2O system for the hydrothermal precipitation of jadeite, albite, natrolite, and analcime in jadeitite of the Itoigawa–Omi area, Japan

Goto

Kunugiza

Matsubara

2017

Journal of Mineralogical and Petrological Sciences

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“…Since a comprehensive review by Harlow and Sorensen (2005), several update reviews (Harlow et al, 2007Tsujimori and Harlow, 2012;Shi et al, 2012;Flores et al, 2013;Franz et al, 2014;Harlow et al, 2014Harlow et al, , 2015Harlow et al, , 2016 and one special issue related to jadeitite as well as numerous research papers have been published. Gemological perspectives on Japanese jadeitite were also summarized recently by Abduriyim et al (2017).…”

Section: Introductionmentioning

confidence: 99%

Jadeitite (jadeite jade) from Japan: History, characteristics, and perspectives

Tsujimori

Harlow

2017

Journal of Mineralogical and Petrological Sciences

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Jadeitite, known as 'hisui' in Japan, has been esteemed as sacred stone in both ancient and modern Japanese cultures. Although it was thought that the source material of Japanese jadeitite was brought from China, the identification of jadeite in 1939 changed this interpretation. Japanese jadeitites and jadeite-rich metasomatic rocks are found in Paleozoic and also Mesozoic geotectonic units. All localities are situated in serpentinite mélange with high-pressure metamorphic rocks and/or serpentinite lenses within a high-pressure metamorphosed complex. Outcrop exposures of contact between jadeitite and host serpentinite are extremely rare. Normally the jadeitites show lithological heterogeneity in the same locality due to multiple deformation, recrystallization, and metasomatic fluid infiltration. Studies over the last two decades have interpreted jadeitite in worldwide either as the direct aqueous fluid precipitate (P-type) from subduction channel into the overlying mantle wedge, as the metasomatic replacement (R-type) by such fluids of oceanic plagiogranite, graywacke, or metabasite along the channel margin, or a combination of these two processes. Japanese jadeitites are classified into one or the other type. Multiple stable isotope characterization analyses for jadeitite and related metasomatic rocks and serpentinite become increasingly important to decode fluid behaviors in past subduction zone. However, available geochemical data on Japanese jadeitite are very limited in comparison with other studied localities. More systematic research will unlock new insights about fluid flow and its impacts at the bottom of forearc mantle where jadeitites form. Chemical differentiation and transportation of the fluids involved in jadeititeformation are crucial topics requiring further research. Nevertheless, the designation of jadeite (and jadeitite) as the national stone of Japan by the Japan Association of Mineralogical Sciences in 2016 should bolster education of the public about this revered stone and its role in subduction zone processes.

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“…The presence of jadeite, especially when coexisting with quartz, is thought to indicate that the jadeite was formed under a high-pressure environment. Two mechanisms of formation of jadeitite have been proposed, i.e., metasomatic replacement of protolith and direct precipitation from aqueous fluids (e.g., Coleman, 1961;Harlow et al, 2007;Tsujimori and Harlow, 2012;Yui et al, 2012;Harlow et al, 2015). Both mechanisms require extensive fluid infiltration and fluid-mineral reactions.…”

Section: Introductionmentioning

confidence: 99%

Chemical composition of fluid inclusions in the Yorii jadeite–quartz rocks from the Kanto Mountains, Japan

Fukuyama

Kawamoto

Ogasawara

2017

Journal of Mineralogical and Petrological Sciences

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Jadeite-quartz rocks from the Yorii area, the Kanto Mountains, central Japan occur as tectonic blocks within serpentinite mélange. Primary two-phase (liquid + vapor) aqueous fluid inclusions are observed in jadeite, quartz, albite and zircon. The fluids trapped in jadeite and quartz are H 2 O with and without CH 4 and show a wide range of salinity (4.7 ± 1.1 wt% NaCl eqv in jadeite; 3.4 ± 0.7 and 13.6 ± 2.0 wt% NaCl eqv in quartz). In this study, we examined the chemical composition of fluid inclusions in quartz from jadeite-quartz rock to understand the characteristics of fluid, which related to the formation of the rocks in the subduction zone. The trace element concentrations of fluid inclusions determined with LA-ICP-MS are enriched in LILE, Li, B, HFSE and transition metals with LILE enriched and relatively HFSE depleted characteristics. These have elemental patterns similar to the HFSE-depleted fluid released from antigorite during subduction, though the orders of magnitude are different. It can be common chemical characteristics of fluid in a subduction zone. There are two possibilities of the chemical composition of the evolved fluid after the formation of jadeite-quartz rocks. HFSE from the fluid can be sequestered into jadeite-quartz rock prior to fluids moving up into a mantle wedge. This process lead the evolved fluids relatively depleted in HFSE and enriched in LILE. Other possibility is that the fluid has same chemical composition of fluid inclusion as the fluid is equilibrated with jadeite-quartz rocks during the jadeite-quartz formation. In both cases, fluid after the metasomatic formation of jadeite-quartz rocks can be relatively enriched in LILE and depleted in HFSE. Magmas generated in subduction zones exhibit distinctive geochemical features of LILE enrichment and HFSE depletion and this characteristic of arc magma can be explained by the behavior of HFSE during the formation of jadeite-quartz rocks.

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Jadeitites and Plate Tectonics

Cited by 94 publications

References 101 publications

Phase relation in the NaAlSiO<sub>4</sub>–SiO<sub>2</sub>–H<sub>2</sub>O system for the hydrothermal precipitation of jadeite, albite, natrolite, and analcime in jadeitite of the Itoigawa–Omi area, Japan

Phase relation in the NaAlSiO<sub>4</sub>–SiO<sub>2</sub>–H<sub>2</sub>O system for the hydrothermal precipitation of jadeite, albite, natrolite, and analcime in jadeitite of the Itoigawa–Omi area, Japan

Jadeitite (jadeite jade) from Japan: History, characteristics, and perspectives

Chemical composition of fluid inclusions in the Yorii jadeite–quartz rocks from the Kanto Mountains, Japan

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