Geochemical variation of the Late Cretaceous-Paleogene granitoids across the Ehime-Hiroshima-Shimane transect, Japan

Ishihara, Shunsō; Ohno, Toshiyuki

doi:10.9795/bullgsj.67.41

Cited by 7 publications

(4 citation statements)

References 25 publications

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“…5). The data of gabbro and gabbroic diorite from the Ryoke belt referred in this study were obtained from mainly Mino-Mikawa Mountains and Ina districts, Central Japan (Ishihara and Chappell, 2007;Yuhara and Kagami, 2007, 2008, 2012Ishihara and Ohno, 2016). Ochi (1982) and Kagami et al (1985) indicated that the gabbroic rocks occur frequently in relatively large masses, and most of these gabbroic rocks occur as masses captured in granitoids.…”

Section: Trace Elementsmentioning

confidence: 86%

“…Diagram showing variations in SiO 2 versus total alkali (Na 2 O + K 2 O) contents of samples from the study area (in wt%;afterMiddlemost, 1989). Solid triangles represent plutonic xenoliths from Hime-shima, with gabbro and diorite samples from the Ryoke belt(Ishihara and Chappell, 2007; Yuhara and Kagami, 2007, 2008, 2012Ishihara and Ohno, 2016) shown for comparison. Gabbro and diorite data from the Sangun belt fromKimura and Hayasaka (2019) are also shown, although data for samples from the Higo belt are not shown because there were insufficient data for a robust comparison.…”

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confidence: 99%

“…MORB-normalized multi-element variation diagramsshowing variations in the compositions of (a) gabbro and (b) gabbroic diorite xenoliths from the Hime-shima area. Green and orange fields represent the range of compositions of the Ryoke gabbro and gabbroic diorite(Ishihara and Chappell, 2007; Yuhara and Kagami, 2007, 2008, 2012Ishihara and Ohno, 2016) and the Sangun gabbro(Kimura and Hayasaka, 2019), respectively. The MORB composition ofSun and McDonough (1989) is used for normalization.…”

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confidence: 99%

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Origin of xenoliths within the Hime–shima volcanic group, Kyushu, southwestern Japan Arc

HIRAYAMA

Shibata

Yoshikawa

et al. 2022

Journal of Mineralogical and Petrological Sciences

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Granitic and gabbroic xenoliths have been found within dacitic lavas in the Hime-shima volcanic group (HVG) of northeastern Kyushu, Japan. The HVG is located near the boundary between the Ryoke and Sangun belts, suggesting that the HVG and associated crustal xenoliths may provide insights into the subsurface distribution of the Ryoke and Sangun belts in Kyushu. This study focuses on xenoliths obtained from the coastal boulders near the Kane Lava of the HVG. The HVG xenoliths consist of gabbro, gabbroic diorite, amphibolite, gneiss, basaltic andesite, and tuffaceous sandstone, with the latter two types resembling those found in the basement rocks of the HVG. The gabbroic xenoliths are geochemically similar to gabbros in the Ryoke belt. The U-Pb dating for zircon in the gneiss xenoliths yielded a metamorphic age of ~111 Ma with Th/U values <0.1, similar to the age obtained for metamorphic rocks in or of the Ryoke belt. The new data presented in this study indicate that the xenoliths in the HVG were derived from basement units associated with the Ryoke belt, which in turn, means that the HVG is tectonically underlain by the Ryoke belt. This also suggests that the Ryoke belt extends further north in Kyushu than was previously considered, as implied by the presence of this belt directly below the HVG.

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Section: Trace Elementsmentioning

confidence: 86%

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confidence: 99%

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confidence: 99%

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Origin of xenoliths within the Hime–shima volcanic group, Kyushu, southwestern Japan Arc

HIRAYAMA

Shibata

Yoshikawa

et al. 2022

Journal of Mineralogical and Petrological Sciences

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“…(2013), Jahn et al. (2014, 2015), Ishihara and Ohno (2016), Tang et al. (2016), Wu, Jahn, et al., 2017, Zhao et al., 2017, Liao et al.…”

Section: Data Availability Statementmentioning

confidence: 99%

Styles of Trench‐Parallel Mid‐Ocean Ridge Subduction Affect Cenozoic Geological Evolution in Circum‐Pacific Continental Margins

Liao

Guo

et al. 2022

Geophysical Research Letters

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Distinct signatures are present in the circum‐Pacific continental margins (e.g., kinematics, magmatism, and basin evolution), possibly influenced by the input of mid‐ocean ridge. It remains enigmatic why the circum‐Pacific continental margins that have experienced trench‐parallel mid‐ocean ridge subduction show diverse geological evolution. Here we present geodynamic modeling results investigating trench‐parallel mid‐ocean ridge subduction and demonstrate two distinct types of model evolution. Type‐Ⅰ model includes a two‐stage steep subduction and is featured by slab detachment preceding the arrival of ridge at the trench. Type‐Ⅱ model is marked by a continuous flat subduction of mid‐ocean ridge with the opening of a slab window beneath intracontinental lithosphere. These two subduction styles produce diverse tectono‐magmatic responses. Our results could explain the magmatic gap and forearc uplift during the Izanagi‐Pacific ridge subduction and the intraplate magmatic flare‐ups and tectonic uplift during the Nazca‐Antarctic ridge subduction, respectively.

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Role of chalcophile element fertility in the formation of the eastern Tethyan post-collisional porphyry Cu deposits

Hao,

Park,

Zheng

et al. 2024

Miner Deposita

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Geochemical variation of the Late Cretaceous-Paleogene granitoids across the Ehime-Hiroshima-Shimane transect, Japan

Cited by 7 publications

References 25 publications

Origin of xenoliths within the Hime–shima volcanic group, Kyushu, southwestern Japan Arc

Origin of xenoliths within the Hime–shima volcanic group, Kyushu, southwestern Japan Arc

Styles of Trench‐Parallel Mid‐Ocean Ridge Subduction Affect Cenozoic Geological Evolution in Circum‐Pacific Continental Margins

Role of chalcophile element fertility in the formation of the eastern Tethyan post-collisional porphyry Cu deposits

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