High-Mg diorites derived from sanukitic HMA magmas, Kyushu Island, southwest Japan arc: evidence from clinopyroxene and whole rock compositions

Kamei, Atsushi

doi:10.1016/j.lithos.2004.03.006

Cited by 168 publications

(54 citation statements)

References 53 publications

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“…High-Mg andesites (adakite-like diorites) are thought to mainly be produced at convergent plate margins (e.g., Jiang et al 2010;Kamei et al, 2004;Shimoda et al, 1998;Stern and Hanson, 1991;Tatsumi and Ishizaka, 1982;Yogodzinski et al, 1995) because the subducting slab can supply the H 2 O that is required to shift the initial melts from basaltic to high-Mg andesitic (dioritic) compositions by either dehydration fluids or partial melts to the peridotite (Wood and Turner, 2009). Therefore, the occurrence of high-Mg diorites suggests a subduction setting (Jiang et al, 2010).…”

Section: Norian (~215 Ma) Of the Late Triassic: A Pre-plate-collisionmentioning

confidence: 99%

Zircon U–Pb geochronology, geochemical and Sr–Nd–Hf isotopic compositions of the Triassic granite and diorite dikes from the Wulonggou mining area in the Eastern Kunlun Orogen, NW China: Petrogenesis and tectonic implications

Ding

Jiang

Sun

2014

Lithos

123

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Section: Norian (~215 Ma) Of the Late Triassic: A Pre-plate-collisionmentioning

confidence: 99%

Zircon U–Pb geochronology, geochemical and Sr–Nd–Hf isotopic compositions of the Triassic granite and diorite dikes from the Wulonggou mining area in the Eastern Kunlun Orogen, NW China: Petrogenesis and tectonic implications

Ding

Jiang

Sun

2014

Lithos

123

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“…Therefore, the Hala'alate and Aladeyikesai formations with similar (Kamei et al 2004). Data for Hatu area are from Yin et al (2012Yin et al ( , 2015a.…”

Section: Fractional Crystallizationmentioning

confidence: 94%

“…Tatsumi (2001) and Tatsumi et al (2003) proposed that the genesis of sanukitoid magmas requires some unusual tectonic conditions. Identification of sanukitoids is crucial for understanding the dynamic evolution of a palaeosubduction system and provides important constraints on the fate of subducted slabs (Tatsumi 1981(Tatsumi , 1982Ishizaka 1981, 1982;Kamei et al 2004;Martin et al 2005). Therefore, sanukitoids have attracted considerable attention from petrologists and geochemists (Tatsumi 1981(Tatsumi , 1982Ishizaka 1981, 1982;Shirey and Hanson 1984;Tatsumi et al 2003;Kamei et al 2004;Zhang et al 2004Zhang et al , 2005Wang et al 2011;Yin et al 2010Yin et al , 2012Yin et al , 2015aMa et al 2012;Tang et al 2012a;Sun et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Identifying late Carboniferous sanukitoids in Hala’alate Mountain, Northwest China: new constraint on the closing time of remnant ocean basin in West Junggar

Wang

et al. 2016

International Geology Review

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Volcanic rocks in the Hala'alate and Aladeyikesai formations, which are composed of basaltic andesite and pyroxene andesite, are widespread in Hala'alate Mountain, West Junggar, Northwest China. These rocks (plagioclase + clinopyroxene/olivine) formed in the late Carboniferous and show a remarkable geochemical affinity with typical sanukitoids with oversaturated SiO 2 (52.9-56.9 wt.%) and high MgO (3.47-6.88 wt.%, Mg # >48) contents. They also exhibit a narrow range of Sr-Nd-Pb isotopes within ( 87 Sr/ 86 Sr) i = 0.7037-0.7041, εNd(t) = 4.4-6.2, 206 Pb/ 204 Pb = 18.22-18.41, 207 Pb/ 204 Pb = 15.48-15.52, 208 Pb/ 204 Pb = 37.99-38.30. Hala'alate Formation volcanic rocks are similar to the sanukitoids of Karamay, with high Sr (633.5-970.1 ppm), Ba (268.7-796.3 ppm), and Sr/Y (61.34-84.28), formed by partial melting of the mantle metasomatized by slab-derived adakitic melts. In contrast, Aladeyikesai Formation volcanic rocks show some affinity with sanukitoids of the Hatu area and the Setouchi Volcanic Belt, with low Sr (442.2-508.7 ppm), Ba (199.2-485.1 ppm), and Sr/Y (25.03-30.28), generated by the partial melting of subducting sediments. Identification of late Carboniferous sanukitoids in Hala'alate Mountain provides important constraints on the closing time of the remnant ocean basin in West Junggar, and implies that multistage subduction-accretionary orogeny plays a crucial role in the evolution and growth of the continental crust in the Central Asian Orogenic Belt. ARTICLE HISTORY

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“…Cretaceous high‐Mg andesites (HMAs) are also reported in Kunisaki (Kamei et al . ), Kanmon (Imaoka et al . ), Kisa (Matsumoto et al .…”

Section: Geological Setting and Samplesmentioning

confidence: 99%

“…; K amei et al . ) and adakitic rocks ( K iji et al . ; Y ada & O wada ; K amei ; Y uhara ) are plotted in F igure a.…”

Section: Introductionmentioning

confidence: 99%

Tectonic reconstruction of batholith formation based on the spatiotemporal distribution of Cretaceous–Paleogene granitic rocks in southwestern Japan

et al. 2015

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The spatiotemporal distribution of Cretaceous-Paleogene granitic rocks in southwestern Japan is investigated to understand the origin of the granitic batholith belt and to reconstruct the tectonic setting of emplacement. New U-Pb zircon ages for 92 samples collected from a region measuring 50 km (E-W) by 200 km (N-S) reveals a stepwise northward younging of granitic rocks aged between 95 and 30 Ma with an agedata gap between 60 and 48 Ma. Based on the spatiotemporal distribution of granite ages, we examine two plausible models to explain the pattern of magmatic activity: (i) subduction of a segmented spreading ridge and subsequent slab melting (ridge-subduction model), and (ii) subduction with a temporally variable subduction angle and corresponding spatial distribution of normal arc magmatism (subduction angle model). We optimize the model parameters to fit the observed magmatism in time and space, and compare the best-fit models. As to ridge subduction model, the best-fit solution indicates that the spreading ridge started to subduct at approximately 100 Ma, and involved a 45-km-wide section of the ridge segment, a subduction obliquity of 30°, and a slow migration velocity (∼1.6 cm/y) of the ridge. These values are within the ranges of velocities observed for present-day ridge subduction at the Chile trench. On the other hand, the best-fit solution of subduction angle model indicates that the subduction angle decreases stepwise from 37°at 95 Ma, 32°at 87 Ma, 22°at 72 Ma, to 20°at 65 Ma, shifting magmatic region towards the continental side. These results and comparison, together with constraints on the geometry of the tectonic setting provided by previous studies, suggest that the ridge subduction model better explains the limited duration of magmatism, although both models broadly fit the data and cannot be ruled out.

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High-Mg diorites derived from sanukitic HMA magmas, Kyushu Island, southwest Japan arc: evidence from clinopyroxene and whole rock compositions

Cited by 168 publications

References 53 publications

Zircon U–Pb geochronology, geochemical and Sr–Nd–Hf isotopic compositions of the Triassic granite and diorite dikes from the Wulonggou mining area in the Eastern Kunlun Orogen, NW China: Petrogenesis and tectonic implications

Zircon U–Pb geochronology, geochemical and Sr–Nd–Hf isotopic compositions of the Triassic granite and diorite dikes from the Wulonggou mining area in the Eastern Kunlun Orogen, NW China: Petrogenesis and tectonic implications

Identifying late Carboniferous sanukitoids in Hala’alate Mountain, Northwest China: new constraint on the closing time of remnant ocean basin in West Junggar

Tectonic reconstruction of batholith formation based on the spatiotemporal distribution of Cretaceous–Paleogene granitic rocks in southwestern Japan

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