Search results for: Toshiaki Tsunogae

Items from 1 to 20 out of 72 results

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Petrology and geochronology of sapphirine‐bearing granulites from the Limpopo Complex in eastern Botswana: Implications for Palaeoproterozoic long‐lived high‐pressure/ultrahigh‐temperature metamorphism and rapid exhumation

Thembiso O. Basupi, Toshiaki Tsunogae, Yukiyasu Tsutsumi

Geological Journal > 57 > 10 > 4194 - 4215

The Limpopo Complex in southern Africa is a classic example of Neoarchean collisional orogens with a Palaeoproterozoic thermal overprint. We report new petrological, pressure–temperature (P–T), and geochronological data of sapphirine‐bearing Mg–Al‐rich and pelitic granulites from a metasupracrustal unit (the Beit Bridge Complex [BBC]) in the eastern part of Botswana to constrain its P–T–time evolution...

article

Multi‐stage metamorphism of ultrahigh‐temperature Mg‐Al granulites during Gondwana assembly: Evidence from southern India

Bing Yu, M. Santosh, Toshiaki Tsunogae, Cheng‐Xue Yang, more

Geological Journal > 57 > 10 > 4300 - 4324

The Southern Granulite Terrane (SGT) in India hosts granulite facies rocks metamorphosed at ultra‐high temperature (UHT) conditions in the various crustal blocks, as well as within the Palghat‐Cauvery Suture Zone (PCSZ), that is considered as a trace of the Late Neoproterozoic—Cambrian Gondwana suture. Here we investigate UHT granulites from the northern margin of the Madurai Block adjacent to the...

article

Experiments and thermodynamic modelling on the blueschists in the Longmu Co‐Shuanghu Suture Zone, North Tibet: Estimation of the metamorphic conditions and implications for garnet stability in the subduction zone

Neng Gong, Xiao‐Chao Che, Guo‐Li Yuan, Gen‐Hou Wang, more

Geological Journal > 57 > 3 > 1221 - 1240

The pressure–temperature (P‐T) path of blueschist is usually applied to understanding the evolution of the subducted oceanic crust. Garnet plays a key role in calculating the metamorphic conditions, but sometimes it is absent in the blueschists. Nevertheless, the high‐P experimental simulation may serve as a useful tool to constrain the P‐T conditions. In the middle of the Longmu Co‐Shuanghu Suture,...

article

Hybrid phase equilibria modelling with conventional and trace element thermobarometry to assess the P–T evolution of UHT granulites: An example from the Highland Complex, Sri Lanka

Prasanna L. Dharmapriya, Sanjeewa P. K. Malaviarachchi, Andrea Galli, Leo M. Kriegsman, more

Journal of Metamorphic Geology > 39 > 2 > 209 - 246

Here we attempt to constrain the P–T evolution of ultrahigh‐temperature granulites using textures coupled with multiple thermobarometric approaches. Sapphirine‐bearing granulites were collected from a quarry in the central part of the Highland Complex of Sri Lanka. Three sapphirine‐bearing domains were selected and petrographically studied. Homogeneous sample domains were thermodynamically modelled...

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Prolonged Neoproterozoic high‐grade metamorphism of the Wanni Complex, Sri Lanka: New insights from petrology, phase equilibria modelling, and zircon U–Pb geochronology of partially melted cordierite gneiss from Walpita

Eri Hirayama, Toshiaki Tsunogae, Sanjeewa P. K. Malaviarachchi, Yusuke Takamura, more

Geological Journal > 55 > 9 > 6147 - 6168

We report new petrological and geochronological data of garnet‐cordierite (Grt‐Crd) gneiss as well as two types of leucocratic rocks (garnet‐bearing and cordierite‐bearing leucosomes) crystallized during prograde and near‐peak metamorphisms of the Wanni Complex (WC) in Sri Lanka, and investigate the pressure–temperature–time evolution of granulite‐facies metamorphism for unravelling the timing and...

article

The genesis of high Ba‐Sr adakitic rocks: Insights from an Early Cretaceous volcanic suite in the central North China Craton

Fei Xue, M. Santosh, Toshiaki Tsunogae, Fan Yang, more

Geological Journal > 55 > 7 > 5398 - 5416

The origin of high Ba‐Sr magmatic suites with adakitic features has remained controversial, although they provide important clues on the evolution of continental lithosphere. Here, we present petrological, geochemical, zircon U–Pb and Lu‐Hf data from an Early Cretaceous volcanic suite of andesitic‐dacitic composition in the Laiyuan complex of the central North China Craton, with a view to gain insights...

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Neoarchean arc magmatism and Paleoproterozoic granulite‐facies metamorphism in the Bhavani Suture Zone, South India

Sam Uthup, Toshiaki Tsunogae, V.J. Rajesh, M. Santosh, more

Geological Journal > 55 > 5 > 3870 - 3895

The Bhavani Suture Zone in the Southern Granulite Terrane marks the zone of amalgamation of the Neoarchean Nilgiri Block and the northwestern Madurai Block in southern India. Here, we report detailed petrological, geochemical, and geochronological data on the Mettupalayam mafic–ultramafic complex within this suture zone with a view to evaluate the tectonothermal history of the Bhavani Suture Zone...

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Neoarchean suprasubduction zone magmatism in the Sonakhan greenstone belt, Bastar Craton, India: Implications for subduction initiation and melt extraction

M.P. Manu Prasanth, K.R. Hari, N.V. Chalapathi Rao, M. Santosh, more

Geological Journal > 54 > 6 > 3980 - 4000

The Neoarchean Sonakhan greenstone belt (SGB) in the north‐eastern Bastar Craton is mainly composed of an association of pillowed and massive tholeiitic basalts emplaced within an intraoceanic environment. Two types of ultrabasic rocks were identified and are designated as TH‐1 and TH‐2 on the basis of geochemical parameters. Both sample suites exhibit depletion of HFSE with reference to LILE and...

article

Pressure‐temperature‐time evolution of ultrahigh‐temperature granulites from the Trivandrum Block, southern India: Implications for long‐lived high‐grade metamorphism

Hikaru Kadowaki, Toshiaki Tsunogae, Xiao‐Fang He, M. Santosh, more

Geological Journal > 54 > 5 > 3041 - 3059

The Southern Granulite Terrane in India comprises a number of Archean to Neoproterozoic magmatic arcs and supracrustal units that underwent latest Neoproterozoic to Cambrian high‐grade metamorphism. Here, we present a new petrological and geochronological data from khondalites in the western part of the Trivandrum Block and discuss pressure‐temperature‐time (P–T–t) path of the block for unravelling...

article

Petrology and phase equilibrium modeling of granulites from Obudu in the Benin-Nigerian Shield, Southeastern Nigeria: implications for clockwise P-T evolution in a collisional orogen

Emmanuel Nwachukwu Ugwuonah, Toshiaki Tsunogae, Barth Nwoye Ekwueme

Mineralogy and Petrology > 2019 > 113 > 3 > 353-368

The Eastern Nigerian terrane forms the eastern flank of the Trans-Saharan Orogenic Belt within the Benin-Nigerian Shield. We report new petrological and P–T data of metamorphic rocks (migmatitic gneisses with subordinate granite gneiss, meta-quartz diorite, and meta-ultramafic rock) from Obudu in the southeastern flank of the Benin-Nigerian Shield for unraveling the tectono-metamorphic signatures...

article

Fluid-induced high-temperature metasomatism at Rundvågshetta in the Lützow-Holm Complex, East Antarctica: Implications for the role of brine during granulite formation

Kazuki Takahashi, Toshiaki Tsunogae, Emmanuel Nwachukwu Ugwuonah

Geoscience Frontiers > 2018 > 9 > 5 > 1309-1323

We report new petrological, phase equilibria modeling, and fluid inclusion data for pelitic and mafic granulites from Rundvågshetta in the highest-grade region of the Neoproterozoic Lützow-Holm Complex (LHC), East Antarctica, and provide unequivocal evidence for fluid-rock interaction and high-temperature metasomatism in the presence of brine fluid. The studied locality is composed dominantly of well-foliated...

article

Magma chamber processes in Early Cretaceous Shangzhuang layered mafic intrusion from the North China Craton

Xue‐Ming Teng, M. Santosh, Toshiaki Tsunogae, Li Tang

Geological Journal > 52 > 5 > 851 - 872

The Fe–Ti ore‐bearing Shangzhuang mafic intrusion in the Yanshan Orogenic Belt, north of the North China Craton, is characterized by compositional layering with troctolite, noritic gabbro and gabbro from the bottom to the top. The intrusive complex formed through fractionation of Fe‐, Ti‐ and Mg‐rich mafic hydrous magma. Here, we present a systematic petrological and mineral data on the various rock...

article

Reply to comment by Wang et al. on “Paleoproterozoic meta-carbonates from the central segment of the Trans-North China Orogen: Zircon U-Pb geochronology, geochemistry, and carbon and oxygen isotopes” by Tang et al., 2016, Precambrian Research 284: 14–29

Li Tang, M. Santosh, Toshiaki Tsunogae, Teruyuki Maruoka

Precambrian Research > 2017 > 294 > C > 350-353

article

Petrogenesis of incipient charnockite in the Ikalamavony sub-domain, south-central Madagascar: New insights from phase equilibrium modeling

Takahiro Endo, Toshiaki Tsunogae, M. Santosh, E. Shaji, more

Lithos > 2017 > 282-283 > C > 431-446

Incipient charnockites representing granulite formation on a mesoscopic scale occur in the Ambodin Ifandana area of Ikalamavony sub-domain in south-central Madagascar. Here we report new petrological data from these rocks, and discuss the process of granulite formation on the basis of petrography, mineral equilibrium modeling, and fluid inclusion studies. The incipient charnockites occur as brownish...

article

Metamorphic P–T evolution of garnet-staurolite-biotite pelitic schist and amphibolite from Keffi, north-central Nigeria: Geothermobarometry, mineral equilibrium modeling and P-T path

Emmanuel Nwachukwu Ugwuonah, Toshiaki Tsunogae, Smart Chika Obiora

Journal of African Earth Sciences > 2017 > 129 > C > 1-16

We report the first detailed petrological and pressure-temperature data from the pelitic schists and amphibolites of the Keffi area, north-central Nigeria, which is located on the eastern flank of the western Nigerian based, Great Nigerian Schist Belt. In one fresh exposure of the schist, staurolite-bearing and staurolite-absent, garnet-rich assemblages occur. All pelitic samples contain garnet, quartz,...

article

Ultrahigh-temperature metagabbros from Wynad: Implications for Paleoproterozoic hot orogen in the Moyar Suture Zone, southern India

Minami Yano, Toshiaki Tsunogae, M. Santosh, Qiong-Yan Yang, more

Journal of Asian Earth Sciences > 2016 > 130 > C > 139-154

The Wynad region is located along the confluence of the Mercara and Moyar Suture Zones in southern India which mark major zones of amalgamation of microcontinental blocks during Neoarchean to Paleoproterozoic. Here we report garnet- and clinopyroxene-bearing metagabbros from this region and present petrological, geochemical, and zircon U-Pb and Lu-Hf isotopic data. The prograde, peak, and retrograde...

article

Crustal evolution in Asia: Correlations and connections

Toshiaki Tsunogae, Sanghoon Kwon, M. Santosh

Journal of Asian Earth Sciences > 2016 > 130 > C > 1

article

Petrology, geochemistry and zircon U-Pb geochronology of a layered igneous complex from Akarui Point in the Lützow-Holm Complex, East Antarctica: Implications for Antarctica-Sri Lanka correlation

Sou Kazami, Toshiaki Tsunogae, M. Santosh, Yukiyasu Tsutsumi, more

Journal of Asian Earth Sciences > 2016 > 130 > C > 206-222

The Lützow-Holm Complex (LHC) of East Antarctica forms part of a complex subduction-collision orogen related to the amalgamation of the Neoproterozoic supercontinent Gondwana. Here we report new petrological, geochemical, and geochronological data from a metamorphosed and disrupted layered igneous complex from Akarui Point in the LHC which provide new insights into the evolution of the complex. The...

article

Petrochemistry and mineral chemistry of Late Permian hornblendite and hornblende gabbro from the Wang Nam Khiao area, Nakhon Ratchasima, Thailand: Indication of Palaeo-Tethyan subduction

Alongkot Fanka, Toshiaki Tsunogae, Veerote Daorerk, Yukiyasu Tsutsumi, more

Journal of Asian Earth Sciences > 2016 > 130 > C > 239-255

In the Wang Nam Khiao area, Nakhon Ratchasima, northeastern Thailand, there are various mafic-ultramafic plutons composed of hornblendite, hornblende gabbro and hornblende microgabbro. The rocks are generally dominated by hornblende, plagioclase and clinopyroxene. The mineral chemistry and whole-rock geochemistry of hornblendite, hornblende gabbro and hornblende microgabbro show their similarities,...

article

High-grade metamorphism during Archean–Paleoproterozoic transition associated with microblock amalgamation in the North China Craton: Mineral phase equilibria and zircon geochronology

Qiong-Yan Yang, M. Santosh, Toshiaki Tsunogae

Lithos > 2016 > 263 > C > 101-121

Metamorphic regimes in Archean terranes provide important keys to the plate tectonic processes in early Earth. The North China Craton (NCC) is one of the ancient continental nuclei in Asia and recent models propose that the cratonic architecture was built through the assembly of several Archean microcontinental blocks into larger crustal blocks. Here we investigate garnet- and pyroxene-bearing granulite...

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Search results for: Toshiaki Tsunogae

Petrology and geochronology of sapphirine‐bearing granulites from the Limpopo Complex in eastern Botswana: Implications for Palaeoproterozoic long‐lived high‐pressure/ultrahigh‐temperature metamorphism and rapid exhumation

Multi‐stage metamorphism of ultrahigh‐temperature Mg‐Al granulites during Gondwana assembly: Evidence from southern India

Experiments and thermodynamic modelling on the blueschists in the Longmu Co‐Shuanghu Suture Zone, North Tibet: Estimation of the metamorphic conditions and implications for garnet stability in the subduction zone

Hybrid phase equilibria modelling with conventional and trace element thermobarometry to assess the P–T evolution of UHT granulites: An example from the Highland Complex, Sri Lanka

Prolonged Neoproterozoic high‐grade metamorphism of the Wanni Complex, Sri Lanka: New insights from petrology, phase equilibria modelling, and zircon U–Pb geochronology of partially melted cordierite gneiss from Walpita

The genesis of high Ba‐Sr adakitic rocks: Insights from an Early Cretaceous volcanic suite in the central North China Craton

Neoarchean arc magmatism and Paleoproterozoic granulite‐facies metamorphism in the Bhavani Suture Zone, South India

Neoarchean suprasubduction zone magmatism in the Sonakhan greenstone belt, Bastar Craton, India: Implications for subduction initiation and melt extraction

Pressure‐temperature‐time evolution of ultrahigh‐temperature granulites from the Trivandrum Block, southern India: Implications for long‐lived high‐grade metamorphism

Petrology and phase equilibrium modeling of granulites from Obudu in the Benin-Nigerian Shield, Southeastern Nigeria: implications for clockwise P-T evolution in a collisional orogen

Fluid-induced high-temperature metasomatism at Rundvågshetta in the Lützow-Holm Complex, East Antarctica: Implications for the role of brine during granulite formation

Magma chamber processes in Early Cretaceous Shangzhuang layered mafic intrusion from the North China Craton

Reply to comment by Wang et al. on “Paleoproterozoic meta-carbonates from the central segment of the Trans-North China Orogen: Zircon U-Pb geochronology, geochemistry, and carbon and oxygen isotopes” by Tang et al., 2016, Precambrian Research 284: 14–29

Petrogenesis of incipient charnockite in the Ikalamavony sub-domain, south-central Madagascar: New insights from phase equilibrium modeling

Metamorphic P–T evolution of garnet-staurolite-biotite pelitic schist and amphibolite from Keffi, north-central Nigeria: Geothermobarometry, mineral equilibrium modeling and P-T path

Ultrahigh-temperature metagabbros from Wynad: Implications for Paleoproterozoic hot orogen in the Moyar Suture Zone, southern India

Crustal evolution in Asia: Correlations and connections

Petrology, geochemistry and zircon U-Pb geochronology of a layered igneous complex from Akarui Point in the Lützow-Holm Complex, East Antarctica: Implications for Antarctica-Sri Lanka correlation

Petrochemistry and mineral chemistry of Late Permian hornblendite and hornblende gabbro from the Wang Nam Khiao area, Nakhon Ratchasima, Thailand: Indication of Palaeo-Tethyan subduction

High-grade metamorphism during Archean–Paleoproterozoic transition associated with microblock amalgamation in the North China Craton: Mineral phase equilibria and zircon geochronology

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