Sr, Nd, and Pb isotope compositions of hemipelagic sediment in the Shikoku Basin: Implications for sediment transport by the Kuroshio and Philippine Sea plate motion in the late Cenozoic

Yu, Su; Ishikawa, Tsuyoshi; Tanimizu, Masaharu; Ujiie, Yasushige; Yamamoto, Yuzuru; Ujiie, Kohtaro; Kanamatsu, Toshiya

doi:10.1016/j.epsl.2015.04.001

Cited by 31 publications

(26 citation statements)

References 37 publications

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“…Independent evidence for gradual changes in sediment supplies to the Shikoku Basin comes from Saitoh et al (). They used Sr–Nd–Pb isotope compositions of sediments from the hemipelagic–pyroclastic facies to define a mixing trend over the past 7 Myr between an East China Sea source and a Japan margin source.…”

Section: Resultsmentioning

confidence: 99%

“…Those decreases in sediment transport from the East China Sea into the Shikoku Basin probably were enhanced by intensification of the Kuroshio Current and drift of the paleo‐position of depositional sites (e.g. C0011 and C0012) relative to the meandering core of the current (Saitoh et al, ). Subordinate sources included a small component of eolian input, delivery of illitic clays via the Kuroshio Current from Taiwan (e.g.…”

Section: Resultsmentioning

confidence: 99%

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The origin of strata within the inner accretionary prism of Nankai Trough: Evidence from clay mineral assemblages along the NanTroSEIZE transect

Underwood

2018

Island Arc

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One of the more prominent architectural elements of the Nankai subduction margin, offshore southwest Japan, is an out‐of‐sequence thrust fault (megasplay) that separates the inner accretionary prism from the outer prism. The inner prism (hanging wall of the megasplay) is dominated by mudstone, which is enigmatic when the sedimentary facies is compared to coeval deposits in the Shikoku Basin (i.e. inputs from the subducting Philippine Sea plate) and to coarser‐grained turbidite sequences from the Quaternary trench wedge. Clay mineral assemblages amplify the mismatches of sedimentary facies. Mudstones from the inner prism are uniformly depleted in smectite, with average bulk values of 23–24 wt%, whereas the Shikoku Basin deposits show progressive decreases in proportions of smectite over time, from averages of 46–48 wt% at 10 Ma to 17–21 wt% at 1 Ma. Plate‐boundary reconstructions for the Philippine Sea region provide one solution to the conundrum. Between 15 Ma and 10 Ma, the Pacific plate subducted near the NanTroSEIZE transect, and a trench‐trench‐trench triple junction migrated to the northeast. Accretion during that period involved sediments that had been deposited on the Pacific plate. Motion of the Philippine Sea plate changed from 10 Ma to 6 Ma, resulting in sinistral slip along the proto‐Nankai Trough. Sediments accreted during that period probably had been deposited near the triple junction, with a hybrid detrital provenance. Renewed subduction of the Philippine Sea plate at 6 Ma led to reorganization of watersheds near the Izu–Honshu collision zone and gradual incision of large submarine canyons on both sides of the colliding Izu arc. Accreted Pliocene mudstones share more of an affinity to the triple junction paleoenvironment than they do to Shikoku Basin. These differences between subducting Shikoku Basin strata and accreted Pacific plate sediments have important implications for interpretations of frictional properties, structural architecture, and diagenetic fluid production.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

The origin of strata within the inner accretionary prism of Nankai Trough: Evidence from clay mineral assemblages along the NanTroSEIZE transect

Underwood

2018

Island Arc

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“…Mud(stone)s from interglacial stages, the lower half of Unit I, and Units III and V lie between the extremes. Glacial stage muds have Sr‐Nd isotope ratios even more enriched than in pelagic clay on the subducting Pacific Plate (Hauff et al, 2003; Scudder et al, ), or in <4.5 Ma sediments near the Nankai Trough (Saitoh et al, ). However, none are as enriched as in the sediments of similar age (4.5–7.0 Ma) near the Nankai Trough.…”

Section: Resultsmentioning

confidence: 99%

“…Symbols and mixing lines as in Figures 4–6 using isotope ratios and element concentrations from Table 2. Comparison data sources: Izu arc Volcanic Front (VF), Active Rifts (AR), Backarc Knolls (BAK), and Rear Arc Seamount Chains (RASC): (Freymuth et al, ; Hochstaedter et al, ; Ishizuka et al, ; Taylor & Nesbitt, ); ODP Sites 1149 and 52, and IODP Site C0011 are bulk sediments (Plank et al, ; Saitoh et al, ; Scudder et al, ). Bulk leached loess data are from Chen and Li ().…”

Section: Resultsmentioning

confidence: 99%

Tuffaceous Mud is a Volumetrically Important Volcaniclastic Facies of Submarine Arc Volcanism and Record of Climate Change

Gill

Bongiolo

Miyazaki

et al. 2018

Geochem Geophys Geosyst

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The inorganic portion of tuffaceous mud and mudstone in an oceanic island arc can be mostly volcanic in origin. Consequently, a large volume of submarine volcaniclastic material is as extremely fine‐grained as products of subaerial eruptions (<100 µm). Using results of IODP Expedition 350 in the Izu rear arc, we show that such material can accumulate at high rates (12–20 cm/k.y.) within 13 km of the nearest seamount summit and scores of km behind the volcanic front. The geochemistry of bulk, acid‐leached mud, and its discrete vitriclasts, shows that >75% of the mud is volcanic, and that most of it was derived from proximal rear arc volcanic sources. It faithfully preserves integrated igneous geochemical information about arc evolution in much the same way that terrigenous shales track the evolution of continental crust. In addition, their high sedimentation rate enables high resolution study of climate cycles, including the effects of Pleistocene glaciation on the behavior of the Kuroshio Current in the Shikoku Basin south of Japan.

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“… (a–d) Sr‐Nd‐Pb isotope plots of the Kaminagata loess samples (this work), Daisen lavas [ Kimura et al ., ], CLP samples [ Chen et al ., ; Sun , ; Sun and Zhu , ], dust collected in China from Taklimakan and Gobi areas [ Jones et al ., ; Yokoo et al ., ; Zhao et al ., ], basement granitoids from southwest Japan [ Kagami et al ., ], the basement Ryoke Zone granitoids of NE Japan [ Hirahara et al ., ], Quaternary lavas from SW Japan [ Kimura et al ., , ] and NE Japan [ Kimura and Yoshida , ], Ocean Drilling Project (ODP) 1149 hemipelagic sediment core [ Plank et al ., ], Integrated Ocean Drilling Program (IODP) C0011 hemipelagic sediment core [ Saitoh et al ., ], ODP Site 885/886 pelagic sediment core [ Pettke et al ., ], and North Pacific pelagic sediment [ Jones et al ., ]. Gobi‐Naiman and Taklimakan‐CLP fields show two provenance areas of loess and Chinese dust.…”

Section: Resultsmentioning

confidence: 99%

Geochemical records from loess deposits in Japan over the last 210 kyr: Lithogenic source changes and paleoclimatic indications

Miyazaki

Kimura

Katakuse³

2016

Geochem Geophys Geosyst

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The generation, transport, and accumulation of tropospheric dust have changed with the paleoclimatic changes of the Quaternary period. Such dust has accumulated in Japan ∼3000 km leeward of the source deserts in China. We analyzed the fractions of windblown fine quartz and bulk major and trace elements, and Sr‐Nd‐Pb isotopic compositions of loess in SW Japan deposited over the past 210 kyr. The results indicated extensive accumulation of tropospheric dust mixed with tephra fragments derived from the nearby Daisen volcano. The accumulation rate of fine quartz and selected elemental/isotopic compositions can be used as climatic proxies that reflect greater accumulation of dust in times of colder climate. Chemical indices for weathering show enhanced effects of weathering during times of warmer climate. The trace element compositions of the loess deposits are surprisingly similar to those of the Chinese loess, hemipelagic sediments in the Sea of Japan and the western Pacific Ocean, and the distal Chinese dust found in Canada. This similarity indicates that the loess dust shares major fractions of these fine‐grained sediments and that geochemical fractionation during the transport was limited. The Sr‐Nd‐Pb isotope compositions of the SW Japan loess indicate an origin predominantly in the Gobi Desert. The high‐latitude Pacific sediments and high‐latitude dust in Canada also show the same signature. However, isotopic compositions of samples from the southern Chinese loess plateau and mid to low‐latitude Pacific sediments are largely derived from the Taklimakan desert, which indicates different delivery pathways of the tropospheric dusts.

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Sr, Nd, and Pb isotope compositions of hemipelagic sediment in the Shikoku Basin: Implications for sediment transport by the Kuroshio and Philippine Sea plate motion in the late Cenozoic

Cited by 31 publications

References 37 publications

The origin of strata within the inner accretionary prism of Nankai Trough: Evidence from clay mineral assemblages along the NanTroSEIZE transect

The origin of strata within the inner accretionary prism of Nankai Trough: Evidence from clay mineral assemblages along the NanTroSEIZE transect

Tuffaceous Mud is a Volumetrically Important Volcaniclastic Facies of Submarine Arc Volcanism and Record of Climate Change

Geochemical records from loess deposits in Japan over the last 210 kyr: Lithogenic source changes and paleoclimatic indications

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