Collett, S. 2025. Detrital zircon tales between the Rodinia and Pangaea supercontinents; exploring connections between Avalonia, Cadomia and Central Asia. Journal of the Geological Society. 182, jgs2024–026.
DOI Google ScholarCLR person interests, research and publications
Researcher
Dr. Stephen Collett
Research fellow
Metamorphic Petrology
+420257089475
stephen.collett@geology.cz
RID:
A-4231-2017
About me
After completing an intergrated masters of geology (MGeol.) degree at the University of Leicester in the United Kingodm, I went on to study for a PhD. at Charles University in Prague. My PhD. research involved a metamorphic and geochronological study of the basement rocks of the Kabul Block in Afghanistan.
I started at the Centre for Lithospheric Research in January 2016 where my research focusses on the metamorphism of high-grade rocks in the northwest Bohemian Massif. Although principally a metamorphic petrologist, I combine elements of geochemistry, isotope geochronology and structural geology into my research.
Research Interests
- Metamorphic petrology and thermodynamic phase-equilibria modelling
- Geochronological dating of igneous and metamorphic processes
- The Variscan orogeny in the north west Bohemian massif
My research is focussed on reconstructing Neoproterozoic and Paleozoic orogenic systems responsible for the consolidation of the terranes of Central and Western Europe. These terranes record a near complete record from the break-up of the Early Neproterozoic supercontinent Rodinia to the consolidation of the Late Paleozoic supercontinent Pangea and understanding their evolution provides important advances to our understanding of the supercontinent cycle. These works are primarily carried out in high-grade terranes that experienced complex and often poly-metamorphic evolution and include structural-petrological (e.g. Collett et al. 2018 - Lithos), detrital zircon geochronological (e.g. Collett et al. 2020 - Gondwana Research), and whole-rock chemical and isotopic studies (e.g. Collett et al. 2021 - JGSL) as well as being involved in large-scale correlative studies (e.g. Martínez Catalan, Collett et al. 2020 - IJES).
In addition I have also been involved in several studies utilising the same methods as above in both Central Asia and the Himalaya and have collaborated with researchers in Czech Republic, Poland, Austria, France, Spain, USA, China, and Afghanistan.
Research projects
Campaign-style geochronology of pre- to syn-collisional Devonian basins of the Variscan Orogenic Belt
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The Variscan Orogenic Belt developed in response to Devonian-Carboniferous collision between Laurussia and Gondwana and closure of the early Paleozoic Rheic Ocean. Although there is little dispute regarding these large-scale paleogeographic elements a long-lasting and persistent controversy exists regarding the existence, provenance and pre-orogenic distribution of smaller terranes and oceanic basins that occupy the collision zone. Owing to the relatively small size of these elements, their existence cannot be tested by paleomagnetic or paleontological methods.
Origin of the relaminant in the Bohemian Massif during the Variscan orogeny
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The granulite-gneiss extrusions in the Bohemian Massif are interpreted as parts of the lower plate, subducted, relaminated below the upper plate and exhumed as kilometre-scale translithospheric diapirs through upper plate. Because dominated by metagranites, it is repeatedly stated that they originated from continent subduction. Many studies were dedicated to their tectono-metamorphic Variscan evolution. Almost missing are studies trying to understand their paleo-environment that allowed such unprecedented travel of rocks through mantle.
Publications
Soejono, I. , Collett, S. , Kohút, M. , Janoušek, V. , Schulmann, K. , Bukovská, Z. , Novotná, N. , Zelinková, T. , Míková, J. , Hora, J. and 2024. Paleogeography of the Gondwana passive margin fragments involved in the Variscan and Alpine collisions: Perspectives from metavolcanic-sedimentary basement of the Western Carpathians. Earth-Science Reviews. 104763.
DOI Google ScholarŠtípská, P. , Schulmann, K. , Soejono, I. , Peřestý, V. , Kylander-Clark, A. , Collett, S. , Aguilar, C. , Maierová, P. , Racek, M. and Hanzl, P. 2024. Supra-subduction thickening of a continental back-arc: Ediacaran–early Cambrian (Baikalian) metamorphism in the NE Baidrag block (Mongolian Collage). Gondwana Research. 135.
DOI Google ScholarMalecki, J. , Collett, S. , Catalán, J.R.M., Castiñeiras, P. , Schulmann, K. , Novotná, N. , Míková, J. and Barreiro, J.G. 2024. The mid-Variscan suture in the Morais complex of Trás-os-Montes (Portugal): insights from geochemistry and geochronology of oceanic rocks. International Geology Review. 1–33.
DOI Google ScholarŠtípská, P. , Peřestý, V. , Soejono, I. , Schulmann, K. , Kylander-Clark, A.R., Aguilar, C. , Collett, S. , Racek, M. , Míková, J. , Dorjsuren, O. and 2023. Anticlockwise metamorphic paths at ca. 890–790 Ma from the NE Baidrag block, Mongolia, indicate back-arc compression at the Rodinia periphery. Geoscience Frontiers. 14, 101520.
DOI Google ScholarLi, Z. , Jiang, Y. , Collett, S. , Štípská, P. , Schulmann, K. , Wang, S. and Sukhorukov, V. 2023. Metamorphic and chronological constraints on the early Paleozoic tectono-thermal evolution of the Olkhon Terrane, southern Siberia. Journal of Metamorphic Geology. 41, 525–556.
DOI Google ScholarSoejono, I. , Janoušek, V. , Peřestý, V. , Schulmann, K. , Svojtka, M. , Hanžl, P. , Hora, J. , Míková, J. , Štípská, P. , Guy, A. , Collett, S. and Otgonbaatar, D. 2023. From Rodinian passive margin to peri-Siberian continental arc: Evidence from the multiphase Neoproterozoic–early Paleozoic magmatic record of the Zavkhan Block in the Mongolian Collage. Gondwana Research.
DOI Google ScholarKong, L.-Z. , De Jiang, Y.-. , Li, P.-F. , Collett, S. and Xiao, M. 2023. Devonian subduction retreat recorded in the Chinese Altai Orogen: Petro-structural and geochronological constraints from orogenic lower crust migmatite-granite complexes. Journal of Asian Earth Sciences. 244, 105540.
Google ScholarMłynarska, M. , Collett, S. , Anczkiewicz, R. , Turniak, K. , Bukała, M. and Mazur, S. 2023. Vestiges of late Cambrian arc-related magmatism within the Variscan belt of Europe: Zircon geochronological and whole-rock geochemical data from the Leszczyniec Metaigneous Complex, Sudetes, Poland. Lithos. 107394.
Google ScholarCollett, S. , Soejono, I. , Peřestý, V. , Schulmann, K. , Štípská, P. , Míková, J. and Novotná, N. 2023. Mongolian micro-continental blocks in Columbia/Nuna: Zircon U–Pb–Hf isotopic evidence for long-lasting Mongolia–Western Siberia connection. Terra Nova.
Google ScholarLi, Z.-Y. , De Jiang, Y.-. , Collett, S. , Štípská, P. , Schulmann, K. , Wang, S. , Sukhorukov, V. , Bai, X.-J. and Zhang, W.-F. 2023. Peri-Siberian Ordovician to Devonian tectonic switching in the Olkhon Terrane (southern Siberia): Structural and geochronological constraints. Tectonics. e2023TC007826.
Google ScholarSoejono, I. , Schulmann, K. , Sláma, J. , Hrdličková, K. , Hanžl, P. , Konopásek, J. , Collett, S. and Míková, J. 2022. Pre-collisional crustal evolution of the European Variscan periphery: Constraints from detrital zircon U–Pb ages and Hf isotopic record in the Precambrian metasedimentary basement of the Brunovistulian Domain. Precambrian Research. 372, 106606.
DOI Google ScholarCollett, S. , Schulmann, K. , Deiller, P. , Štípská, P. , Peřestý, V. , Ulrich, M. , Jiang, Y. , De Hoÿm de Marien, L. and Míková, J. 2022. Reconstruction of the mid-Devonian HP-HT metamorphic event in the Bohemian Massif (European Variscan belt). Geoscience Frontiers. 13, 101374.
DOI Google ScholarBurianek, D. , Soejono, I. , Schulmann, K. , Janoušek, V. , Hanžl, P. , Čáp, P. , Bold, U. , Svojtka, M. , Collett, S. and Żácek, V. 2022. Subduction-controlled temporal and spatial variations in early Palaeozoic sedimentary and volcanic record of the Mongol-Altai Domain. Journal of Asian Earth Sciences. 230, 105182.
DOI Google ScholarCollett, S. , Mazur, S. , Schulmann, K. and Soejono, I. 2022. Significance of a late neoproterozoic–Early Cambrian southern Baltica active margin in late-stage Rodinian and early Gondwanan reconstructions. Precambrian Research. 383, 106918.
DOI Google ScholarCollett, S. , Štípská, P. , Schulmann, K. , Míková, J. and Kröner, A. 2021. Tectonic significance of the Variscan suture between Brunovistulia and the Bohemian Massif. Journal of the Geological Society. 178.
DOI Google ScholarXu, K. , Jiang, Y. , Wang, S. , Shu, T. , Li, Z.-Y. , Collett, S. , Yuan, C. and Kong, L.-Z. 2021. Multi-phase tectonothermal evolution in the SE Chinese Altai, central Asia: Structures, U-Pb monazite ages and tectonic implications. Lithos. 392, 106148.
Google ScholarDeiller, P. , Štípská, P. , Ulrich, M. , Schulmann, K. , Collett, S. , Peřestý, V. , Hacker, B. , Kylander-Clark, A. , Whitechurch, H. and Lexa, O. 2021. Eclogite subduction wedge intruded by arc-type magma: The earliest record of Variscan arc in the Bohemian Massif. Gondwana Research. 99, 220–246.
Google ScholarCollett, S. , Schulmann, K. , Štípská, P. and Míková, J. 2020. Chronological and geochemical constraints on the pre-variscan tectonic history of the Erzgebirge, Saxothuringian Zone. Gondwana Research. 79, 27–48.
DOI Google ScholarCatalán, J.R.M., Collett, S. , Schulmann, K. , Aleksandrowski, P. and Mazur, S. 2020. Correlation of allochthonous terranes and major tectonostratigraphic domains between NW Iberia and the Bohemian Massif, European Variscan belt. 109, 1105–1131.
Google ScholarŠtípská, P. , Závada, P. , Collett, S. , Kylander-Clark, A.R.C., Hacker, B.R., Tabaud, A.-S. and Racek, M. 2020. Eocene migmatite formation and diachronous burial revealed by petrochronology in NW Himalaya, Zanskar. Journal of Metamorphic Geology. 38, 655–691.
DOI Google ScholarHuang, Y. , Jiang, Y. , Collett, S. , Wang, S. , Xu, K. , Shu, T. , Li, P. and Yuan, C. 2020. Magmatic recycling of accretionary wedge: A new perspective on Silurian-Devonian I-type granitoids generation in the Chinese Altai. Gondwana Research.
DOI Google ScholarHuang, Y. , Jiang, Y. , Yu, Y. , Collett, S. , Wang, S. , Shu, T. and Xu, K. 2020. Nd-Hf Isotopic Decoupling of the Silurian—Devonian Granitoids in the Chinese Altai: A Consequence of Crustal Recycling of the Ordovician Accretionary Wedge?. Journal of Earth Science.
Google ScholarCollett, S. , Štípská, P. , Schulmann, K. , Peřestý, V. , Soldner, J. , Anczkiewicz, R. , Lexa, O. and Kylander-Clark, A. 2018. Combined Lu-Hf and Sm-Nd geochronology of the Mariánské Lázně Complex: New constraints on the timing of eclogite- and granulite-facies metamorphism. Lithos. 304–307, 74–94.
DOI Google ScholarCollett, S. , Štípská, P. , Kusbach, V. , Schulmann, K. and Marciniak, G. 2017. Dynamics of Saxothuringian subduction channel/wedge constrained by phase-equilibria modelling and micro-fabric analysis. Journal of Metamorphic Geology. 35, 253–280.
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