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Biography

Professional biography

I hold a permanent Faculty position (Senior Research Fellow) in the Department of Earth and Environmental Sciences here at the Open University, and lead the the Ar-Ar and Noble Gas Research Group and Laboratory. I am also the current Director of STEM Postgraduate Research and have been awarded the status of UKCGE Recognised Research Supervisor, for which I am a scheme reviewer. I am also on the edttorial board of the Jounal of Petrology, and I am an Executive Editor of Geological Magazine.

My research is argon-centric and entirely laser-based; my interests mainly lie within the realm of technique development and application, as a means to extracting information about processes or events that generally resist arrest when it comes to conventional bulk sampling methods.

My current preoccupation is to find new ways in which we can increase the spatial resolution of Ar/Ar laserprobe dating to extract new information from rocks and minerals. Through this I and colleagues are investigating the diffusion mechanisms of argon in feldpsars, understanding the behaviour of argon durinbg friction melting, the uptake of excess argon in mudrocks and their attendant strain-fringes, the timing of fluid-rock interaction through dating authigenic alkali feldspars, dating meteorite impact craters, the behaviour of argon in volcanic glasses, and most recently in basalts. All using Ar/Ar laserprobe methods.

I also foster collaborative and commercial Ar/Ar dating opportunities with collaborators and clients in the UK and Ireland, many European countries, North and South America, Asia and Australia. I welcome any enquiries about potential collaborations or commercial arrangements, please get in touch if you think Ar/Ar geochronology can solve your scientific problem.

Publications

Journal Article

Evidence for long-lived (>100 Myr) continental intraplate volcanism: Mongolia since the last ocean closure (2024)

Petrogenesis of Miocene volcanism in the Central Anatolia: Geochemical, isotopic and geochronological evidence (2024)

Emplacement history of the Central Anatolian Ophiolites: insights from the Felahiye Ophiolite in Central Türkiye (2024)

Geochronology and petrochemistry of Karabiga pluton in western Sakarya Zone (NW Turkey): Implications from new zircon U-Pb and biotite Ar/Ar ages, Sr-Nd isotope data and bulk-rock geochemistry (2024)

New evidence for the presence of the Inner Tauride Ocean: Lithological, geochronological and P-T correlations with the Tavşanlı and Afyon zones of Central Anatolia (Türkiye) (2023)

Late Cretaceous – Paleogene tectonothermal evolution of the Akdağ Massif in the central anatolian crystalline complex (northern Kayseri, central Turkey) (2023)

Almacık Complex-an exhumed lower to middle crust in northwest Anatolia (2023)

Late Paleocene – Middle Eocene magmatic flare-up in western Anatolia (2022)

The 40Ar–39Ar dating and geochemistry of the Carpathian C1 obsidians (Zemplín, Slovakia) (2021)

Tracking the behaviour of persistently degassing volcanoes using noble gas analysis of Pele's hairs and tears: A case study of the Masaya volcano (Nicaragua) (2021)

Dating deformation using sheared leucogranite: temporal constraints by 40Ar/39Ar thermochronology for the Mae Ping shear zone, NW Thailand (2021)

Expanding the toolbox for dating basaltic lava sequences: 40Ar–39Ar dating of silicic volcanic glass from interbeds (2021)

A Middle Eocene lowland humid subtropical “Shangri-La” ecosystem in central Tibet (2020)

Oligocene deformation of the Chuandian terrane in the SE margin of the Tibetan Plateau related to the extrusion of Indochina (2020)

İzmir‐Ankara suture as a Triassic to Cretaceous plate boundary – data from central Anatolia (2020)

Petrology and 40Ar-39Ar dating of paragneisses from the Devrekani Massif (Central Pontides, Northern Turkey): Implications for the Jurassic high-T metamorphism in an extensional tectonic environment (2019)

Blueschist facies overprint of late Triassic Tethyan oceanic crust in a subduction–accretion complex in north-central Anatolia, Turkey (2019)

Volcanic constraints on the unzipping of Africa from South America: Insights from new geochronological controls along the Angola margin (2019)

Widespread tephra dispersal and ignimbrite emplacement from a subglacial volcano (Torfajökull, Iceland) (2019)

Uplift, Climate and Biotic Changes at the Eocene-Oligocene Transition in Southeast Tibet (2019)

Caledonian metamorphism of metasediments from Franz Josef Land (2019)

New 40Ar/39Ar dating of the Antrim Plateau Volcanics, Australia: clarifying an age for the eruptive phase of the Kalkarindji continental flood basalt province (2018)

Spatially heterogeneous argon-isotope systematics and apparent 40Ar/39Ar ages in perlitised obsidian (2018)

Recycling Argon through Metamorphic Reactions: the Record in Symplectites (2018)

Geology of Tindfjallajökull volcano, Iceland (2018)

Samples from Lomonosov Ridge place new constraints on the geological evolution of Arctic Ocean (2018)

Extension rates across the northern Shanxi Grabens, China, from Quaternary geology, seismicity and geodesy (2017)

Argon redistribution during a metamorphic cycle: Consequences for determining cooling rates (2016)

Permo-Carboniferous granitoids with Jurassic high temperature metamorphism in Central Pontides, Northern Turkey (2016)

Tracing the Initiation of the Tribeč Mountain Exhumation by Laser-Probe 40Ar/39Ar Dating of Seismogenic Pseudotachylytes (Western Carpathians, Slovakia) (2016)

Origin and geodynamic environments of the metamorphic sole rocks from the İzmir-Ankara-Erzincan suture zone (Tokat, Northern Turkey) (2016)

40Ar/39Ar ages and residual volatile contents in degassed subaerial and subglacial glassy volcanic rocks from Iceland (2015)

Observation of centimetre-scale argon diffusion in alkali feldspars: implications for 40Ar/39Ar thermochronology (2014)

Forests of the tropical eastern Andean flank during the middle pleistocene (2014)

Low-pressure - high-temperature metamorphism during extension in a Jurassic magmatic arc, Central Pontides, Turkey (2014)

Metamorphic rocks seek meaningful cooling rate: interpreting 40Ar/39Ar ages in an exhumed ultra-high pressure terrane (2012)

Geochronological constraints on a Permo-Triassic impact crater: U-Pb and 40Ar/39Ar results from the 40km Araguainha crater of central Brazil (2012)

A simple method for in situ U-Th-He dating (2012)

Using white mica 40Ar/39Ar data as a tracer for fluid flow and permeability under high-P conditions: Tauern Window, Eastern Alps (2012)

Cryptic microtextures and geological histories of K-rich alkali feldspars revealed by charge contrast imaging (2012)

Partitioning of excess argon between alkali feldspars and glass in a young volcanic system (2011)

Response to comment on "The response of vegetation on the Andean flank in western Amazonia to Pleistocene climate change" (2011)

New Ar-Ar ages of southern Indian kimberlites and a lamproite and their geochemical evolution (2011)

Interpreting high-pressure phengite 40Ar/39Ar laserprobe ages: an example from Saih Hatat, NE Oman (2011)

The response of vegetation on the Andean flank in western Amazonia to Pleistocene climate change (2011)

40Ar/39Ar dating of oil generation and migration at complex continental margins (2010)

High spatial resolution 40Ar/39Ar dating of pseudotachylites: geochronological evidence for multiple phases of faulting within basement gneisses of the Outer Hebrides (2009)

Empirical constraints on extrusion mechanisms from the upper margin of an exhumed high-grade orogenic core, Sutlej valley, NW India (2009)

The significance of the contemporaneous Logoisk impact structure (Belarus) and Afro-Arabian flood volcanism (2009)

Excess argon (40ArE) uptake during slate formation: a 40Ar/39Ar UV laserprobe study of muscovite strain-fringes from the Palaeozoic Welsh Basin, UK (2008)

A laser probe 40Ar /39Ar and INAA investigation of four Apollo granulitic breccias (2008)

New impact-melt rock from the Roter Kamm impact structure, Namibia: Further constraints on impact age, melt rock chemistry, and projectile composition (2008)

Ar–Ar dating of authigenic K-feldspar: Quantitative modelling of radiogenic argon-loss through subgrain boundary networks (2008)

Late Palaeozoic hydrocarbon migration through the Clair field, West of Shetland, UK Atlantic margin (2008)

Grenville-age pseudotachylite in the Lewisian: laserprobe 40Ar/39Ar ages from the Gairloch region of Scotland (UK) (2008)

Resolution of regional fluid flow related to successive orogenic events on the Laurentian margin (2007)

First field evidence of southward ductile flow of Asian crust beneath southern Tibet (2007)

Cretaceous and Triassic subduction-accretion, high-pressure-low-temperature metamorphism, and continental growth in the Central Pontides, Turkey (2006)

Temperature-composition-time (T-X-t) data from authigenic K-feldspar: an integrated methodology for dating fluid flow events (2006)

Re-evaluating the age of the Haughton impact event (2005)

A high resolution record of multiple diagenetic events: Ultraviolet laser microprobe Ar/Ar analysis of zoned K-feldspar overgrowths (2005)

Dating of multistage fluid flow in sandstones (2005)

Radiogenic isotope records of Quaternary glaciations: Changes in the erosional source and weathering processes (2004)

Dating fault reactivation by Ar/Ar laserprobe: an alternative view of apparently cogenetic mylonite–pseudotachylite assemblages (2004)

Laser microprobe 40Ar–39Ar analysis of pseudotachylyte and host-rocks from the Tatra Mountains, Slovakia: evidence for late Palaeogene seismic/tectonic activity (2003)

Chemical heterogeneities of Caledonian (?) pseudotachylites in the Eidsfjord Anorthosite, north Norway (2003)

Precise dating of low-temperature deformation: Strain-fringe analysis by 40Ar-39Ar laser microprobe (2003)

Fingerprinting polyorogenic detritus using the 40Ar/39Ar ultraviolet laser microprobe (2002)

Excess argon evolution in HP–LT rocks: a UVLAMP study of phengite and K-free minerals, NW Turkey (2002)

Two-stage erosion and deposition in a continental margin setting: A 40Ar/39Ar laserprobe study of offshore detrital white micas in the Norwegian Sea (2001)

A laser-probe 40Ar/39Ar study of pseudotachylite from the Tambach Fault Zone, Kenya: direct isotopic dating of brittle faults (2001)

Presentation / Conference

Noble gas behaviour in pumice: Implications for volcanic degassing (2020)

The Frankenstein Gabbro (Odenwald, Germany): A New Analogue for Martian Hydrothermal Systems (2019)

Noble gases: A tool to track the degassing of active volcanic systems (2017)

Understanding the degassing of young volcanic systems using noble gases (2017)

Containers, sensors and samples to understand desert weathering (2015)

Metamorphic rocks seek meaningful cooling rates: new views from muscovite 40Ar/39Ar dating (2012)

40Ar/39Ar systematics in an exhumed ultra-high pressure terrane: implications for the timing of exhumation (2012)

Tracking fluid action in Little Sark Pluton (Channel Islands, UK): a UV laserprobe Ar/Ar study of excess 40Ar (2011)

Spatial evaluation of Ar-systematics in rocks from the British Channel Islands: a UV laserprobe Ar/Ar study of excess 40Ar (2010)

Potential of short wavelength laser ablation of organic materials (2009)

Is UV laser ablation a suitable tool for geochemical analysis of organic rich source materials? (2008)

Hydrothermal alteration in the Frankenstein gabbro Martian analogue: first models