Toshiaki Tsunogae

University of Tsukuba · School of Life and Environmental Sciences

The southern part of the Malawi Basement Complex is regarded as being part of the Mozambique Belt, which was formed by a series of collisions between Archean cratons and/or Proterozoic magmatic arcs during Neoproterozoic to Cambrian time. The region is particularly important because of its location near the junction between the East-African (ca. 60...

The Aniyapuram Mafic and Ultramafic Complex (AMUC) is a dismembered ophiolite of Neoarchean to Paleoproterozoic age, exposed in south-central part of the Cauvery Suture Zone (CSZ), Southern Granulite Terrane (SGT), India. The complex comprises ultramafic rocks like serpentinized peridotites of harzburgite variety and pyroxenites of websterite varie...

The location of the Tarim craton during the assembly and breakup of the Rodinia supercontinent remains enigmatic, with some models advocating a Tarim-Australia connection and others a location at the heart of the unified Rodinia supercontinent between Australia and Laurentia. In this study, our new zircon U-Pb dating results suggest that middle Neo...

We report new petrological and geochronological data, together with zircon REE patterns, of mafic granulites from the Lützow-Holm Complex (LHC), East Antarctica, and investigate the pressure-temperature-time (P-T-t) evolution of granulite-facies metamorphism in order to unravel the timing and tectonics of Neoproterozoic collisional processes relate...

The evolution of the northern margin of Gondwana, especially to the north of India and Australia, remains enigmatic. Much controversy concerns when and where the Tarim craton was amalgamated with northern Gondwana due to final closure of the North and South Altyn Oceans (two branches of the Proto−Tethys Ocean between southeastern Tarim and northern...

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‐...

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 c...

The assembly of Gondwana supercontinent involved multiple stages of continent convergence during the Neoproterozoic including arc magmatism and final collisional metamorphism. Peninsular India occupies a key position in the Gondwana supercontinent assembly where widespread Neoproterozoic magmatic records are preserved. Here, we investigate represen...

This study addresses the Neoarchean to Paleoproterozoic thermal evolution from the Buhwa Greenstone Belt (BGB) along the contact zone between the Archean Zimbabwe Craton (ZC) and a granulite terrane of the Northern Marginal Zone (NMZ) of the Limpopo Complex. Available tectonic models suggest a thrusting of the hot NMZ over and onto the cold ZC, whi...

The Madurai block is the largest composite crustal block in the Southern Granulite terrane of India, where granulite-facies rocks metamorphosed at ultrahigh-temperature (UHT) conditions occur in several localities. Here, we investigated UHT rocks from Rajapalayam, in the southern domain of the Southern Granulite terrane, using integrated thermobaro...

The Bastar craton in central India, surrounded by cratonic blocks and Paleoproterozoic to Neoproterozoic orogenic belts, is a window to investigate the Archean-Paleoproterozoic crustal evolution and tectonic processes. Here we propose a new tectonic classification of the craton into the Western Bastar Craton (WBC), Eastern Bastar Craton (EBC), and...

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...

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...

The Mantiqueira and the Juiz de Fora Complexes (MQC and JFC) in the Araçuaí-Ribeira orogenic system, southeastern Brazil, have been regarded as parts of the Neoproterozoic to Cambrian Brasiliano Orogeny formed by a series of collisions of the São Francisco and the Congo Cratons. Here we report new petrological, geochemical, and zircon U-Pb and Lu-H...

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‐tempera...

The Tuareg shield lies to the west of the Pan-African domains and records a complex orogenic evolution during the Late Neoproterozoic. It is bordered to the west by the West African craton (WAC), which is stable since 2 Ga, from the east by the East Saharan Metacraton. Two main deformational phases, namely; the early collision with the WAC through...

Imprints of Marion hotspot magmatism representing the final stages of rifting between India and Madagascar from the Gondwana assembly occur scattered in several localities of southern India. In this study, we report evidence for rift‐related Santonian magmatism from alkali gabbro in the Madurai Block and present mineralogical, petrological, zircon...

The North China Craton (NCC) underwent significant lithospheric destruction during the Mesozoic, although the mechanisms and timings associated with this process remain debated. The extensive magmatism associated with craton destruction includes dyke suites of diverse composition derived from lithospheric and asthenospheric sources. Here we investi...

The Tefedest terrane belongs to the central Hoggar terranes, part of the Tuareg shield located in south Algeria. These terranes recorded a complex orogenic process related to different stages of the Pan-African orogeny (630-520Ma) which dislocate the Hoggar to different blocks separated by major lineaments. The main purpose of this study is to fit...

The North China Craton (NCC) was amalgamated through Late Neoarchean amalgamation of seven microblocks along zones of ocean closure represented by granite-greenstone belts (GGB). Typical basement rocks of the Zunhua GGB between the Qianhuai and Jiaoliao microblocks are exposed in the Miyun area of the NCC. Here we report petrology, mineral chemistr...

The Zambezi Belt in southern Africa has been regarded as a part of the 570–530 Ma Kuunga Orogen formed by a series of collision of Archean cratons and Proterozoic orogenic belts. Here, we report new petrological, geochemical, and zircon U-Pb geochronological data of various metamorphic rocks (felsic to mafic orthogneiss, pelitic schist, and felsic...

Sri Lanka is composed of four major tectonic units known as the Wanni, Highland, Kadugannawa and Vijayan complexes, and preserves important records of the history of the Gondwana supercontinent. The Highland Complex records Neoproterozoic–Cambrian metamorphism associated with the assembly of the supercontinent Gondwana. We combine phase equilibria...

Identifying the spatial distribution or extent of individual granitoids in Archean high-grade terranes can be complicated, with the effect of overprint events resulting in localized varieties. The case study presented here highlights this issue from the Limpopo Complex high-grade terrane in southern Africa. The Beit Bridge Complex segment preserves...

Madagascar, a major fragment of Gondwana, is mainly composed of Precambrian basement rocks formed by Mesoarchean to Neoproterozoic tectono-thermal events and recording a Pan-African metamorphic overprint. The Ranotsara Shear Zone in southern Madagascar has been correlated with shear zones in southern India and eastern Africa in the reconstruction o...

Kiruna-type iron oxide-apatite associations occur in a variety of rock types and their origin has remained controversial. Most of the Kiruna-type deposits are associated with intermediate to felsic rocks, and in rare cases with ultramafic rocks. Here we investigate the Seruwila iron oxide-apatite deposit at the contact between the Highland and Vija...

The Tefedest terrane belongs to the central Hoggar terranes, part of the Tuareg shield located in south Algeria. These terranes recorded a complex orogenic process related to different stages of the Pan-African orogeny (630-520Ma) which dislocate the Hoggar to different blocks separated by major lineaments. The main purpose of this study is to fit...

The composition of magmas considered to be parental to layered ultramafic to mafic intrusions are commonly studied using rocks occurring along their marginal portion, in contact with the surrounding country rock. With a size, approximately 1/3rd of the ∼2.05 Ga Bushveld Complex layered intrusion, mafic to ultramafic rocks of the Molopo Farms Comple...

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 Lützow-Holm Complex (LHC) of East Antarctica has been regarded as a collage of Neoarchean (ca. 2.5 Ga), Paleoproterozoic (ca. 1.8 Ga), and Neoproterozoic (ca. 1.0 Ga) magmatic arcs which were amalgamated through the latest Neoproterozoic collisional events during the assembly of Gondwana supercontinent. Here, we report new geochronological data...

The Paleoproterozoic (1.7 Ga) basement rocks from Maddhapara, Bangladesh show a large range of chemical variations (e.g. SiO2 =50.7-74.7%) and include diorite, quartz diorite, monzodiorite, quartz monzonite and granite. The pluton overall displays metaluminous, calc-alkaline orogenic suite; mostly I-type suites formed within subduction-related magm...

Carboniferous biotite granite, Late Permian hornblende granite, and Triassic biotite-hornblende granite, all of which belong to the Eastern Granite Belt, expose in the Wang Nam Khiao area, Nakhon Ratchasima, northeastern Thailand. The Carboniferous biotite granite is dominated by quartz, K-feldspar, plagioclase, and biotite. The Late Permian hornbl...

Late Mesozoic granitoids, widely distributed in the Yanshan Belt of the North China Craton (NCC), are important markers of cratonic destruction and lithospheric thinning. We report new petrological, geochemical, zircon U-Pb and Lu-Hf isotopic data on two late Mesozoic granitic plutons from the central NCC near the Trans-North China Orogen.We report...

A garnet–pyroxene granulite from Austhovde in the Lützow–Holm Complex, East Antarctica, contains two types of fluid inclusions: a small number of primary inclusions in garnet and quartz, and dominant secondary inclusions in garnet and plagioclase. The melting temperatures of the trapped fluids lie in a range of −57.2 to −56.4 °C, which are close to...

The Lützow-Holm Complex (LHC) of East Antarctica forms a part of the latest Neoproterozoic–Cambrian high-grade metamorphic segment of the East African–Antarctic Orogen. Here we present new petrological, geochemical, and zircon U–Pb geochronological data on meta-igneous rocks from four localities (Austhovde, Telen, Skallevikshalsen, and Skallen) in...

The suprasubduction zone mantle wedge of active convergent margins is impregnated by melts and fluids leading to the formation of a variety of magmatic and metasomatic rock suites. Here we investigate a composite mafic-ultramafic intrusion at Gaositai, in the northern margin of the North China Craton (NCC). The hornblende gabbro – serpentinite – du...

The Madurai Block (MB) is the largest Precambrian crustal block in the Southern Granulite Terrane (SGT) of India and hosts rare cordierite- and orthopyroxene-bearing granulites. Investigations based on field study, petrology, metamorphic P–T estimation, and detrital zircon geochronology of these granulites are crucial for understanding the ultrahig...

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 s...

The present research deals with mineralogy of Gondwana sequence from Barapukuria Formation, Bangladesh. Petrography, XRD, SEM and EPMA have been utilized to identify minerals with their mineralization processes, provenance, paleoclimate and post-depositional changes of rocks. Mineral assemblages indicate significant clay minerals of mixed-layered i...

Petrogenesis of orthopyroxene-bearing assemblage of incipient charnockite at Ginikarawa near Kurunegala in the Wanni Complex, Sri Lanka, is discussed here on the basis of petrography and mineral equilibrium modeling. In Ginikarawa, dark brownish to grayish irregular patches and lenses of charnockite (biotite + orthopyroxene + K-feldspar + plagiocla...

The Madurai Block in southern India is a composite collage of at least three sub-blocks, with Neoarchean–Paleoproterozoic segments in the north and central domains, and a Neoproterozoic segment in the south. Here we investigate a suite of rocks with magmatic protoliths that constitute the basement in the southern margin of the Madurai Block includi...

We report the first detailed petrological and pressure-temperature data from the pelitic schists and am-phibolites 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 assem...

Mapping of a section along the Sand River in the high-grade metamorphic Central Zone of the Limpopo Complex, South Africa, delineated meta-peridotite, meta-pyroxenite and meta-gabbro occurring as conformable layers in the host supracrustal rocks. The ultramafic to mafic rocks form part of the Palaeoarchaean Messina layered intrusion. Modal mineralo...

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...

The Trans-North China Orogen (TNCO) represents one of the major Paleoproterozoic collisional orogens across the central part of the North China Craton. Here we investigate the meta-carbonates (marbles and calc-silicate rocks) from the Fuping and Zanhuang Complexes in the TNCO through a combination of detrital zircon U–Pb geochronology, geochemistry...

Detrital zircons are important proxies for crustal provenance and have been widely used in tracing source characteristics and continental reconstructions. Southern Peninsular India constituted the central segment of the Late Neoproterozoic supercontinent Gondwana and is composed of crustal blocks ranging in age from Mesoarchean to Late Neoproterozo...

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 systemat...

The Mercara Shear Zone is sandwiched between the Western Dharwar Craton and the Coorg Block in the Southern Granulite Terrain of India, and is marked by steep gravity gradients interpreted to suggest the presence of underplated high-density material in the lower crust. Here we present geological, petrological and geochemical data, together with zir...

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...

The Mercara Shear Zone is sandwiched between the Western Dharwar Craton and the Coorg Block of the Southern Granulite Terrain. The shear zone includes metaigneous suite and metasedimentary rocks. The present study brings out novel data on the geochemistry, P­T, geochronology (from Zircon U­Pb) and the genetic history (from Lu­Hf systematics) of the...

Native copper grains are found in aphyric amygdaloidal basalt of early Miocene age (ca. 20 Ma) in the southern Mineoka belt of Boso Peninsula, central Japan. The native copper was precipitated in the amygdules or veins along with calcite and analcime. The temperature of precipitation and salinity of the fluids related to the native copper are appro...

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...

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-...

The Southern Peninsular India preserves a number of Archean cratonic nuclei among which the Coorg Block is considered to represent a Mesoarchean microcontinent. Here we investigate the southern margin of this block where remnants of rare ultramafic rocks in association with arc magmatic rocks and accreted metasediments occur in the Wynad region. We...

Sri Lanka is composed of four major tectonic units: the Wanni, Highland, Kadugannawa and Vijayan complexes, with important records of Neoproterozoic tectonic events including subduction-related vertical and lateral continental growth associated with the final assembly of the Gondwana supercontinent. Here we investigate the boundary between the High...

The Fuping, Wutai and Hengshan Complexes in the North China Craton preserve imprints of widespread late Neoarchean magmatism. Here we report results from systematic petrology, mineral chemistry, whole rock major, trace and platinum-group element geochemistry, zircon U-Pb geochronology and Hf-O isotopes from the Yangmuqiao mafic-ultramafic intrusion...

The Kumta and Mercara suture zones welding together Archean crustal blocks in western peninsular India offer critical insights into Precambrian continental juxtapositions and the crustal evolution of eastern Gondwana. Here we present the results from an integrated study of the structure, geology, petrology, mineral chemistry, metamorphic P-T condit...

The Lützow-Holm Complex (LHC) of East Antarctica forms part of the Neoproterozoic-Cambrian high-grade metamorphic segment of the East African-Antarctic Orogen. Here we present new petrological, geochemical, and zircon U-Pb and Lu-Hf isotopic data for meta-igneous rocks including charnockite, felsic gneiss, metagabbro, and mafic granulite from the L...

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. He...

The Sundamalai peralkaline pluton is one among the Cryogenian alkaline plutons occurring in the Dharmapuri Rift Zone (DRZ) of the Salem Block in the Southern Granulite Terrane (SGT) of India. Here we present zircon U–Pb age and Lu–Hf isotopic composition, mineral chemistry and geochemistry of the pluton to explore the petrogenesis and geodynamic im...