Timing of mylonitization in the Nihonkoku Mylonite Zone of north Central Japan: Implications for Cretaceous to Paleogene sinistral ductile deformation in the Japanese Islands

Takahashi, Yutaka; Mao, Jianren; Zhao, Xilin

doi:10.1016/j.jseaes.2011.07.013

Cited by 10 publications

(5 citation statements)

References 28 publications

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“…The principal new feature of the evolution of the NW Pacific is that two arc terranes, Achaivayam‐Valaginskaya and Kronotskaya arcs, were collided with the continental margin of Asia in south Kamchatka during Paleocene to Eocene (Hourigan et al, ; Konstantinovskaia, ). This stress resulted in low‐temperature deformation and mylonitization during 60–55 Ma in the Tanagura Tectonic Line, one of the major shear zones in Central Japan (Takahashi et al, ). In the region surrounding the Songliao Basin, this stress produced the last stage of sinistral displacement along the Tan‐Lu strike‐slip fault from Bohai Bay to the northern Sikhote‐Alin area (Kudymov, ; Yu et al, ).…”

Section: Discussionmentioning

confidence: 99%

Post‐rift Tectonic History of the Songliao Basin, NE China: Cooling Events and Post‐rift Unconformities Driven by Orogenic Pulses From Plate Boundaries

et al. 2018

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The classic lithosphere‐stretching model predicts that the post‐rift evolution of extensional basin should be exclusively controlled by decaying thermal subsidence. However, the stratigraphy of the Songliao Basin in northeastern China shows that the post‐rift evolution was punctuated by multiple episodes of uplift and exhumation events, commonly attributed to the response to regional tectonic events, including the far‐field compression from plate margins. Three prominent tectonostratigraphic post‐rift unconformities are recognized in the Late Cretaceous strata of the basin: T11, T03, and T02. The subsequent Cenozoic history is less constrained due to the incomplete record of younger deposits. In this paper, we utilize detrital apatite fission track (AFT) thermochronology to unravel the enigmatic timing and origin of post‐rift unconformities. Relating the AFT results to the unconformities and other geological data, we conclude that in the post‐rift stage, the basin experienced a multiepisodic tectonic evolution with four distinct cooling and exhumation events. The thermal history and age pattern document the timing of the unconformities in the Cretaceous succession: the T11 unconformity at ~88–86 Ma, the T03 unconformity at ~79–75 Ma, and the T02 unconformity at ~65–50 Ma. A previously unrecognized Oligocene unconformity is also defined by a ~32–24 Ma cooling event. Tectonically, all the cooling episodes were regional, controlled by plate boundary stresses. We propose that Pacific dynamics influenced the wider part of eastern Asia during the Late Cretaceous until Cenozoic, whereas the far‐field effects of the Neo‐Tethys subduction and collision processes became another tectonic driver in the later Cenozoic.

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Section: Discussionmentioning

confidence: 99%

Post‐rift Tectonic History of the Songliao Basin, NE China: Cooling Events and Post‐rift Unconformities Driven by Orogenic Pulses From Plate Boundaries

et al. 2018

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“…Many Late Cretaceous to Paleogene granitic plutons are distributed in the Uetsu region, NE Japan. The Nihonkoku mylonite (60–55 Ma; Takahashi et al ., 2012) trending NW–SE, lies in the middle of the Uetsu region and divides the Uetsu region into north and south regions (Figure 1). A batholitic pluton of the Iwafune granite is widely distributed in the south Uetsu region, and many small stocks of granodiorite occur in the north Uetsu region (ANRE, 1982; Izumino et al ., 2016).…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal activity in the Obiro deposit embedded in the Tagawa acidic rocks, Uetsu region,NEJapan

et al. 2020

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The Obiro deposit is located in the Tagawa Acidic Rocks (AR), Uetsu region, NE Japan. The Tagawa AR is composed of a volcanic phase of dacitic welded tuff and a plutonic phase of porphyritic granodiorite. Drill core and ore samples were collected from the deposit and examined by XRD, EPMA, and microthermometry. The drill core samples have suffered pervasively from sericite (illite) alteration, whereas pinkish K-feldspar alteration halo occur close to veins. The results of EPMA and microthermometry is interpreted as that the magnatic-hydrothermal fluids has changed as follows; the granodioritic magma intruded at about 1.0 kb and 700 C near the water-saturated granite solidus; after cooling to about 500 C the fluids boiled according to a change in the pressure regime from lithostatic to hydrostatic; mixing with meteoric water led to sulfide mineralization at around 400 C or less. The main reasons for the mineralization in the Obiro deposit are as follows; the oxidized magma intruded at a shallower level, and thereafter hydrothermal fluids were boiled, resulting in a saline fluid. The saline fluid then dissolved metals such as Pb, Zn, Cu, and Bi, and these metals precipitated during cooling accompanied by dilution of the meteoric water and increasing pH, resulting in decreasing solubility.

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“…(i) clockwise rotation of the southwest Japan arc (e.g., [1]), (ii) deformation of the northeast Japan arc by NNW-SSE-trending strike-slip faults (e.g., [2][3][4][5]), (iii) ocean floor spreading in the northern Japan Sea (e.g., [6][7][8]), (iv) extension of the continental crust in the southern Japan Sea (e.g., [7,9,10]), (v) inversion tectonics at the plate boundary on the eastern margin of the northern Japan Sea (e.g., [11]), and (vi) rotation of the Philippine Sea Plate (e.g., [12,13]).…”

Section: Introductionmentioning

confidence: 99%

Cenozoic Fault Zone Activity and Geologic Evolution of the Offshore Regions of Fukushima and Miyagi Prefectures, Northeastern Japan, Based on Petroleum Exploration Data

Arato¹

2017

Evolutionary Models of Convergent Margins - Origin of Their Diversity

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Three major fault zones were identified in the offshore regions of Fukushima and Miyagi prefectures, northeastern Japan, from petroleum exploration seismic and well data acquired by the Ministry of Economy, Trade and Industry (METI) and its predecessor: the Kesennuma tectonic line (KTL), the Ishinomaki tectonic line (ITL), and the Joban tectonic line (JTL). The stratigraphic relationships indicate that these tectonic lines were activated during the Middle Miocene, and that their activity was likely closely connected with the opening of the Japan Sea and the drifting of the northeast Japan arc to its current position. Parts of these tectonic lines were reactivated during the Late Pliocene and Quaternary in the Sendai Bay area.

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Timing of mylonitization in the Nihonkoku Mylonite Zone of north Central Japan: Implications for Cretaceous to Paleogene sinistral ductile deformation in the Japanese Islands

Cited by 10 publications

References 28 publications

Post‐rift Tectonic History of the Songliao Basin, NE China: Cooling Events and Post‐rift Unconformities Driven by Orogenic Pulses From Plate Boundaries

Post‐rift Tectonic History of the Songliao Basin, NE China: Cooling Events and Post‐rift Unconformities Driven by Orogenic Pulses From Plate Boundaries

Hydrothermal activity in the Obiro deposit embedded in the Tagawa acidic rocks, Uetsu region,NEJapan

Cenozoic Fault Zone Activity and Geologic Evolution of the Offshore Regions of Fukushima and Miyagi Prefectures, Northeastern Japan, Based on Petroleum Exploration Data

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