Dr. Masafumi Sudo

My current interests are,

(1) application of laser-heating 40Ar/39Ar dating method to Quaternary volcanic field or relatively younger geologic events, in order to obtain ex. higher resolutional, evolutional history of volcanoes and magmatic systems.

Some previous chronological studies on volcanic fields:

• K-Ar geochronology of Quaternary Ojikajima monogenetic volcano group, SW Japan
• K-Ar geochronology of Quaternary Aira caldera, SW Japan
• K-Ar and 40Ar/39Ar analysis of Quaternary “Macolod Corridor” volcanic field, southwestern Luzon, Philippines
• 40Ar/39Ar analysis of tephras in the drilled cores from Quaternary Eifel maar lakes 

(2) application of in-situ laser ablation 40Ar/39Ar dating or Ar isotopic analysis to extract geochronological/geochemical information from the rock or mineral with higher spatial resolution.

Peer-reviewed papers:

Fairey, B.J., M.J. Timmerman, M. Sudo and H. Tsikos (2019): The Role of Hydrothermal Activity in the Formation of Karst-Hosted Manganese Deposits of the Postmasburg Mn Field, Northern Cape Province, South Africa. Minerals, 9, 408; doi.org/10.3390/min9070408

Trumbull, R.B., M. Sudo, C. Harris, R.A., Armstrong and C.H. de Beer (2019): The age of the Koegel Fontein anorogenic complex, South Africa, and its relationship to the regional timing of magmatism and breakup along the South Atlantic rifted margin. South African Journal of Geology, 122, 69-78, doi.org/10.25131/sajg.122.0007

Sokół, K., R. Halama, K. Meliksetian, I. P. Savov, G. Navasardyan and M. Sudo (2018): Alkaline magmas in zones of continental convergence: The Tezhsar volcano-intrusive ring complex, Armenia. Lithos, 320-321, 172-191, doi.org/10.1016/j.lithos.2018.08.028

Willner, A. P., C. R. van Staal, A. Zagorevski, J. Glodny, R. L. Romer, M. Sudo (2018): Tectonometamorphic evolution along the Iapetus suture zone in Newfoundland: Evidence for polyphase Salinic, Acadian and Neoacadian very low- to medium-grade metamorphism and deformation. Tectonophysics, 742-743, 137-167, doi.org/10.1016/j.tecto.2018.05.023

Halama, R., J. Glodny, M. Konrad-Schmolke and M. Sudo (2018): Rb-Sr and in situ 40Ar/39Ar dating of exhumation-related shearing and fluid-induced recrystallization in the Sesia zone (Western Alps, Italy). Geosphere, v. 14, no. 4, doi.org/10.1130/GES01521.1

Karo, N. M., R. Oberhänsli, A. M. Aqrawi, E. M. Elias, K. J. Aswad and M. Sudo (2018): New 40Ar/39Ar age constraints on cooling and unroofing history of the metamorphic host rocks (and igneous intrusion associates) from the Bulfat Complex (Bulfat area), NE-Iraq. Arabian Journal of Geosciences, 11:234, doi.org/10.1007/s12517-018-3571-x

Ishizuka, O., R. Hickey-Vargas, R. J. Arculus, G. M. Yogodzinski, I. P. Savov, Y. Kusano, A. McCarthy, P. A. Brandl and M. Sudo (2018): Age of Izu-Bonin-Mariana arc basement. Earth and Planetary Science Letters, 481, 80-90, doi:10.1016/j.epsl.2017.10.023

Pokorny, R., L. Krmicek and M. Sudo (2017): An endemic ichnoassemblage from a late Miocene paleolake in SE Iceland. Palaeogeography, Palaeoclimatology, Palaeoecology, 485, 761-773, doi:10.1016/j.palaeo.2017.07.033

Engelhardt, J., M. Sudo, M. Stockhecke and R. Oberhänsli (2017): Feldspar 40Ar/39Ar dating of ICDP PALEOVAN cores. Geochimica et Cosmochimica Acta, 217, 144-170, doi:10.1016/j.gca.2017.07.039

Spinola, D. N., T. Pi-Puig, E. Solleiro-Rebolledo, M. Egli, M. Sudo, S. Sedov and P. Kühn (2017): Origin of clay minerals in Early Eocene volcanic paleosols on King George Island, Maritime Antarctica. Scientific Reports, 7, 6368, doi:10.1038/s41598-017-06617-x

Owen-Smith, T. M., L. D. Ashwal, M. Sudo and R. B. Trumbull (2017): Age and petrogenesis of the Doros Complex, Namibia, and implications for Early Plume-derived melts in the Paraná-Etendeka LIP. Journal of Petrology, 58, 423-442, doi:10.1093/petrology/egx021

Aramayo, A., S. Guzmán, F. Hongn, C. del Papa, C. Montero-López and M. Sudo (2017): A Middle Miocene (13.5-12 Ma) deformational event constrained by volcanism along the Puna-Eastern Cordillera border, NW Argentina. Tectonophysics, 703-704, 9-22, doi:10.1016/j.tecto.2017.02.018

Guzmán, S., M. R. Strecker, J. Martí, I. A. Petrinovic, T. F. Schildgen, P. Grosse, C. Montero-López, M. Neri, R. Carniel, F. D. Hongen, C. Muruaga and M. Sudo (2017): Construction and degradation of a broad volcanic massif: The Vicuna Pampa volcanic complex, southern Central Andes, NW Argentina. Geological Society of America Bulletin, 129, 750-766, doi:10.1130/B31631.1

Ballato, P., F. Cifelli, G. Heidarzadeh, M. Ghassemi, A. Wickert, J. Hassanzadeh, G. Dupont-Nivet, P. Balling, M. Sudo, G. Zeilinger, A. Schmitt, M. Mattei and M. Strecker (2016): Tectono-sedimentary evolution of the northern Iranian Plateau: insights from middle-late Miocene foreland-basin deposits. Basin Research, 1-30, doi: 10.1111/bre.12180

Scharf, A., M. R. Handy, S. M. Schmid, S. Favaro, M. Sudo, R. Schuster and K. Hammerschmidt (2016): Grain-size effects on the closure temperature of white mica in a crustal-scale extensional shear zone - implications of in-situ 40Ar/39Ar laser-ablation of white mica for dating shearing and cooling (Tauern Window, Eastern Alps). Tectonophysics, 674, 210-226, doi:10.1016/j.tecto.2016.02.014

Aygül, M., A. I. Okay, R. Oberhänsli and M. Sudo (2016): Pre-collisional accretionary growth of the southern Laurasian active margin, Central Pontides, Turkey. Tectonophysics, 671, 218-234, doi:10.1016/j.tecto.2016.01.010

Becerril, L., T. Ubide, M. Sudo, J. Marti, I Galindo, C. Gale, J. M. Morales, J. Yepes and M. Lago (2016): Geochronological constraints on the evolution of El Hierro (Canary Islands). Journal of African Earth Sciences, 113, 88-94, doi:10.1016/j.jafrearsci.2015.10.012

Aygül, M., A. I. Okay, R. Oberhänsli, A. Schmidt and M. Sudo (2015): Late Cretaceous infant intra-oceanic arc volcanism, the Central Pontides, Turkey: Petrogenetic and tectonic implications. Journal of Asian Earth Sciences, 111, 312-327, doi:10.1016/j.jseaes.2015.07.005

Ennis, M., P. A. Meere, M. J. Timmerman and M. Sudo (2015): Post-Acadian sediment recycling in the Devonian Old Red Sandstone of Southern Ireland. Gondwana Research, 28, 1415-1433, doi:10.1016/j.gr.2014.10.007

Willner, A. P., S. M. Barr, J. Glodney, H.-J. Massonne, M. Sudo, S. N. Thomson, C. R. van Staal and C. E. White (2015): Effects of fluid flow, cooling and deformation as recorded by 40Ar/39Ar, Rb-Sr and zircon fission track ages in very low- to low-grade metamorphic rocks in Avalonian SE Cape Breton Island (Nova Scotia, Canada). Geological Magazine, 152, 767-787, doi:10.1017/S0016756814000508

Montero-López, C., M. R. Strecker, T. F. Schildgen, F. Hongn, S. Guzmán, B. Bookhagen and M. Sudo (2014): Local high relief at the southern margin of the Andean plateau by 9 Ma: Evidence from ignimbritic valley fills and river incision. Terra Nova, 26, 454-460, doi: 10.1111/ter.12120

Pingel, H., R. N. Alonso, A. Mulch, A. Rohrmann, M. Sudo and M. R. Strecker (2014): Pliocene orographic barrier uplift in the southern Cenral Andes. Geology, 42, 691-694, doi:10.1130/G35538.1

Lepetit, P., L. Viereck, J. D. A. Piper, M. Sudo, A. Gürel, I. Copuroglu, M. Gruber, B. Mayer, M. Koch, O. Tatar and H. Gürsoy (2014): 40Ar/39Ar dating of ignimbrites and plinian air-fall layers from Cappadocia, Central Turkey: Implications to chronostratigraphic and Eastern Mediterranean palaeoenvironmental record. Chemie der Erde, 74, 471-488, doi: 10.1016/j.chemer,2014.05.001

Halama, R., M. Konrad-Schmolke, M. Sudo, H. Marschall and M. Wiedenbeck (2014): Effects of fluid-rock interaction on 40Ar/39Ar geochronology in high-pressure rocks (Sesia-Lanzo Zone, Western Alps). Geochimica et Cosmochimica Acta, 126, 475-494, doi: 10.1016/j.gca.2013.10.023

Van der Meer, Q. H. A., J. M. Scott, T. E. Waight, M. Sudo, A. Scherstén, A. F. Cooper and T. L. Spell (2013): Magmatism during Gondwana break-up: new geochronological data from Westland, New Zealand. New Zealand Journal of Geology and Geophysics, 56, 229-242

Ogasawara, M., M. Fukuyama, K. Horie, T. Sumii, M. Takehara and M. Sudo (2013): SHRIMP U-Pb age of SoriZ93 zircon from the Sori Granodiorite, Northeast Japan: a potential reference zircon of Late Cretaceous age. Island Arc, 22, 306–317

Thiede, R. C., E. R. Sobel, J. Chen, L. M. Schoenbohm, D. F. Stockli, M. Sudo and M. R. Strecker (2013):  Late Cenozoic extension and crustal doming in the India-Eurasia collision zone: New thermochronologic constraints from the NE Chinese Pamir.  Tectonics, 32, 763-779

Özsayin, E., A. Çiner, B. Rolay, K. Dirik, D. Melnick, D. Fernández-Blanco, G. Bertotti, T. F. Schildgen, Y. Garcin, M. R. Strecker and M. Sudo (2013):  Plio-Quaternary extensional tectonics of the Central Anatolian Plateau: a case study from the Tuz Gölü Basin, Turkey.  Turkish Journal of Earth Sciences, 22, 691-714

Pourteau A., M. Sudo, O. Candan, P. Lanari, O. Vidal and R. Oberhänsli (2013):  Neotethys closure history of Anatolia: insight from 40Ar-39Ar geochronology and P-T estimation in high-pressure metasediments.  Journal of Metamorphic Geology, 31, 585-606

Sobel, E. R., J. Chen, L. M. Schoenbohm, R. Thiede, D. F. Stockli, M. Sudo and M. R. Strecker (2013):  Oceanic-style subduction controls late Cenozoic deformation of the Northern Pamir orogen.  Earth Planetary and Science Letters, 363, 204-218

Sirocko, F., S. Dietrich, D. Veres, P. M. Grootes, K. Schaber-Mohr, K. Seelos, M.-J. Nadeau, B. Kromer, L. Rothacker, M. Krbetschek, P. Appleby, U. Hambach, C. Rolf, M. Sudo and S. Grim (2013):  Multi-proxy dating of Holocene maar lakes and Pleistocene dry maar sediments in the Eifel, Germany.  Quaternary Science Reviews, 62, 56-76

Beyene, Y., S. Katoh, G. WoldeGabriel, W. K. Hart, K. Uto, M. Sudo, M. Kondo, M. Hyodo, P. R. Renne, G. Suwa and B. Asfaw (2013):  The characteristics and chronology of the earliest Acheulean at Konso, Ethiopia.  Proceedings of the National Academy of Sciences of the United States of America, 110, 1584-1591

Willner, A. P., H.-J. Massonne, U. Ring, M. Sudo and S. Thomson (2012):  P-T evolution and timing of a late Palaeozoic fore-arc system and its heterogeneous Mesozoic overprint in north-central Chile (latitudes 31–32°S).  Geological Magazine, 149, 177-207

Willner, A. P., A. Gerdes, H.-J. Massonne, A. Schmidt, M. Sudo, S. N. Thomson, and G. Vujovich (2011):  The geodynamics of collision of a microplate (Chilenia) in Devonian times  deduced by the pressure-temperature-time evolution within part of a collisional belt (Guarguaraz Complex, W-Argentina).  Contribution to Mineralogy and Petrology, 162, 303-327

Guzmán, S. R., I. A. Petrinovic, J. A: Brod, F. D. Hongn, R. E. Seggiaro, L. M. C. Montero, E. Dantas, and M. Sudo (2011):  Petrology of the Luingo caldera (SE margin of the Puna plateau): a middle Miocene window of the arc-back arc configuration.  Journal of Volcanology and Geothermal Research, 200, 171-191

Sobel, E. R., L. M. Schoenbohm, J. Chen, R. Thiede, D. F. Stockli, M. Sudo and M. R. Strecker (2011):  Late Miocene-Pliocene deceleration of dextral slip between Pamir and Tarim: Implication for Pamir orogenesis.  Earth Planetary and Science Letters, 304, 369-378

Montero, L. M. C., H. Fernando, R. Marret, M. Strecker, R. Seggiaro and M. Sudo (2010):  Late Miocene-early Pliocene onset of N-S extension along the southern margin of the Central Andean Puna Plateau: Evidence from magmatic,geochronological and structural observations.   Tectonophysics, 494, 48-63

Wilke, F. D. H., P. J. O’Brien, A. Gerdes, M. J. Timmerman, M. Sudo and M. A. Khan (2010):  The multistage exhumation history of the Kaghan Valley UHP series, NW Himalaya, Pakistan from U-Pb and 40Ar/39Ar ages.  European Journal of Mineralogy, 22, 703-719

Ballato, P., C. E. Uba, A. Landgraf, M. R. Strecker, M. Sudo, D. F. Stockli, A. Friedrich and S. H. Tabatabaei (2010):  Arabia-Eurasia continental collision: insights from late Tertiary foreland-basin evolution in the Alborz mountains, northern Iran.  Geological Society of America Bulletin, 123, 106-131

Vásquez, M., U. Altenberger, R. L. Romer, M. Sudo and J. M. Moreno-Murillo (2010):  Magmatic evolution of the Andean Eastern Cordillera of Colombia during the Cretaceous: Influence of previous tectonic processes.  Journal of South American Earth Sciences, 29, 171-186

Willner, A., F. Sepúlveda, F. Hervé, H. Massonne and M. Sudo (2009):  Conditions and timing of pumpellyite-actinolite metamorphism in the Early Mesozoic frontal accretionary prism of the Madre de Dios Archipelago (latitude 50º 20’ S; Southern Chile).  Journal of Petrology, 50, 2127-2155

Wiederkehr, M., M. Sudo, R. Bousquet, A. Berger and S. M. Schmid (2009): Alpine orogenic evolution from subduction to collisional thermal overprint:  The 40Ar/39Ar age constraints from the Valaisan Ocean, Central Alps.  Tectonics, 28, TC6009

Carrapa, B, P. G. DeCelles, P. W. Reiners, G. E. Gehrels, and M. Sudo (2009):  Apatite triple dating and white mica 40Ar/39Ar thermochronology of syntectonic detritus in the Central Andes: A multiphase tectonothermal history.  Geology, 37, 407-410

Bachmann, R., O. Oncken, J. Glodny, W. Seifert, V. Georgieva and M. Sudo (2009):  Exposed plate interface in the European Alps reveals fabric styles and gradients related to an ancient seismogenic coupling zone.  Journal of Geophysical Research, 114, B5402

Uto, K., Y. Yamamoto, M. Sudo, S. Uchiumi, O. Ishizuka, T. Kogiso and H. Tsunakawa (2007):  New K-Ar ages of the Society Islands in French Polynesia and implication for the Society hotspot feature.  Earth Planets and Space, 59, 879-885

Yamamoto, Y., O. Ishizuka, M. Sudo and K. Uto (2007):  40Ar/39Ar ages and paleomagnetism of transitionally magnetized volcanic rocks in the Society Islands, French Polynesia: Raiatea excursion in the upper-Gauss Chron.  Geophysical Journal International, 169, 41-59

Ozawa, A., T. Tagami and M. Sudo (2004):  K-Ar geochronology on the temporal change of eruptive style in the eastern Izu peninsula, central Japan.  The Island Arc, 13, 462-472

Ozawa, A., T. Tagami, E. L. Listanco, M. Arpa and M. Sudo (2004):  Initiation and propagation of subduction along the Philippine trench: evidence from temporal and spatial distribution of volcanoes.  Journal of Asian Earth Sciences, 23, 105-111

Hasebe N., A. Fukutani, M. Sudo and T. Tagami (2001):  Transition of eruptive style in an arc-arc collision zone: K-Ar dating of Quaternary monogenetic and polygenetic volcanoes in the Higashi-Izu region, Izu peninsula, Japan.  Bulletin of Volcanology, 63, 377-386

Petrone C. M., T. Tagami, L. Francalanci, A. Matsumura and M. Sudo (2001):  Volcanic systems in the San Pedro-Ceboruco graben (Nayarit, Mexico) in the light of new K-Ar geochronological data.  Geochemical Journal, 35, 77-88

Sudo M., E. L. Listanco, N. Ishikawa, T. Tagami, H. Kamata and Y. Tatsumi (2000):  K-Ar dating of the volcanic rocks from Macolod Corridor in southwestern Luzon, Philippines: toward understanding of the Quaternary volcanism and tectonics.  Journal of the Geological Society of the Philippines, 54, 89-104

Sudo M., K. Ishihara and Y. Tatsumi (2000):  Pre-caldera volcanic history in Aira caldera area - K-Ar dating of lavas from Kajiki and Kokubu areas in northern part and Ushine area in Southern part of the caldera -.  Bulletin of the Volcanological Society of Japan, 45, 1-12 (in Japanese with English abstract)

Sudo M., K. Uto, Y. Tatsumi, and K. Matsui (1998):  K-Ar geochronology of a Quaternary monogenetic volcano group in Ojika Jima District, Southwest Japan.  Bulletin of Volcanology, 60, 171-186

Sudo M., K. Uto, K. Anno, O. Ishizuka and S. Uchiumi (1998):  SORI93 biotite: A new mineral standard for K-Ar dating.  Geochemical Journal, 32, 49-58

Uto, K., K. Anno, M. Sudo and S. Uchiumi (1996):  K-Ar ages for the Middle Miocene Muro volcanic rocks, Southwest Japan.  Bulletin of the Volcanological Society of Japan, 41, 257-261 (in Japanese with English abstract)

Sudo M., O. Ohtaka and J. Matsuda (1994):  Noble gas partitioning between metal and silicate under high pressures: The case of iron and peridotite.  "Noble Gas Geochemistry and Cosmochemistry" (edt. by J. Matsuda), Terra Scientific Publishing Company, 355-372

Matsuda J., M. Sudo, M. Ozima, K. Ito, O. Ohtaka and E. Ito (1993):  Noble gas partitioning between metal and silicate under high pressures.  Science, 259, 788-790

Selected non-reviewed papers:

Sudo M., K. Uto, D. Miki and K. Ishihara (2001): K-Ar dating of volcanic rocks along the Aira caldera rim: Part 2 - Volcanic history of western and northwestern areas of caldera and Sakurajima volcano -. Annuals of the Disaster Prevention Research Institute, Kyoto University, 44, B-1, 305-316 (in Japanese with English abstract) 

Sudo M., K. Uto, D. Miki, K. Ishihara and Y. Tatsumi (2000): K-Ar dating of volcanic rocks along the Aira caldera rim - Volcanic history before explosive Aira pyroclastic eruption -. Annuals of the Disaster Prevention Research Institute, Kyoto University, 43, B-1, 15-35 (in Japanese with English abstract)

Sudo, M., T. Tagami, K. Sato, N. Hasebe and S. Nishimura (1996): Calibration of a new analytical system for the K-Ar dating method and analytical results of K-Ar age known samples. Memoirs of the Faculty of Science, Kyoto University, Series of Geology and Mineralogy, 58, 21-40