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Matthew F. Thirlwall
Royal Holloway, University of London
GeologyBasaltGeochemistryPetrologyMantle (geology)
254Publications
72H-index
14.2kCitations
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Publications 234
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#1H. Tim Breitfeld (RHUL: Royal Holloway, University of London)H-Index: 5
#2Colin G. Macpherson (Durham University)H-Index: 31
Last. Juliane Hennig-Breitfeld (RHUL: Royal Holloway, University of London)H-Index: 1
view all 6 authors...
Abstract We present new geochronological and geochemical data for Neogene magmatism from West Sarawak. Zircon U-Pb geochronology divides Neogene magmatic rocks of West Sarawak into a Lower Miocene West Sarawak Sintang Suite with ages of c. 19 to 21 Ma, and a Middle Miocene Bau Suite with ages of c. 12 to 14 Ma. Magmatism occurred in multiple short-lived pulses from approximately 24 Ma and was coeval with magmatic activity in NW Kalimantan and East Kalimantan. The majority of, but not all, Bau Su...
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#1Juliane Hennig-Breitfeld (RHUL: Royal Holloway, University of London)H-Index: 1
#2H. Tim Breitfeld (RHUL: Royal Holloway, University of London)H-Index: 5
Last. Matthew F. Thirlwall (RHUL: Royal Holloway, University of London)H-Index: 72
view all 5 authors...
Abstract The Miri Zone in Sarawak contains thick Paleogene to Neogene sedimentary successions that extend offshore into the Sarawak Basin (Balingian and Central Luconia Provinces) and Sabah Basin. Exploration offshore has shown the Sarawak Basin in the South China Sea contains major hydrocarbon reservoirs. The sediments on land are age equivalents of the offshore successions and can be used to provide insights into their sedimentological and stratigraphic relations. However, because the rocks ar...
2 CitationsSource
2 CitationsSource
#1Wolf Uwe ReimoldH-Index: 39
#2Natalia HauserH-Index: 6
Last. Marie HoffmannH-Index: 2
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A Sr-isotope chronostratigraphy is presented for Miocene sediments deposited by the “Paranense” Sea along 1200 km of the southwestern Atlantic coast of Argentina and Uruguay. Numerical ages were obtained for shells of Aequipecten paranensis from the Argentinean Puerto Madryn Formation, Facies Balneario La Loberia, “Entrerriense Beds” of the Salado Basin, and Parana Formation, and from the Camacho Formation (Uruguay). The87Sr/86Sr ages fall into five age-groups that encompass the “Paranense” floo...
3 CitationsSource
#1Elizabeth Henton (UCL Institute of Archaeology)H-Index: 3
#2Joe Roe (UCL Institute of Archaeology)H-Index: 2
Last. Anne-Lise Jourdon (UCL: University College London)
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AbstractIn the north-east Jordan steppe, gazelle were of considerable economic importance to human groups during the Epipalaeolithic and Neolithic. An influential model argues that gazelle herds mi...
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#1Thomas Matthew Vandyk (RHUL: Royal Holloway, University of London)H-Index: 3
#2D. P. Le Heron (RHUL: Royal Holloway, University of London)H-Index: 9
Last. Nathalie V. Grassineau (RHUL: Royal Holloway, University of London)H-Index: 24
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Olistolith production and magmatism are processes commonly associated with extensional tectonic settings, such as rift basins. We present a cautionary exemplar from one such Precambrian basin, in which we reinterpret metabasite bodies, previously documented as sills, to be olistoliths. We nevertheless demonstrate that, on the basis of field observation alone, the previous but erroneous sill interpretation is parsimonious. Indeed, it is only by using isotopic age and compositional analysis that t...
4 CitationsSource
#1Elizabeth Henton (UCL Institute of Archaeology)H-Index: 3
#2Isabelle RubenH-Index: 1
Last. Anne-Lise JourdanH-Index: 6
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ABSTRACTThe hunting of Gazella subgutturosa was a dominant practice for Epipalaeolithic and early Neolithic hunter–gatherers in the east Jordan steppe. The seasonal mobility of this taxon in the Levant is poorly understood, especially for early prehistory when herd movements would have influenced hunter-gatherer use of the steppes. This paper proposes four patterns of seasonal herd mobility for G. subgutturosa centred on Jordan’s Azraq Basin. The four patterns are modelled using oxygen, carbon a...
6 CitationsSource
#1Maria Rosaria Renna (UNIME: University of Messina)H-Index: 9
#2Riccardo Tribuzio (UNIPV: University of Pavia)H-Index: 23
Last. Matthew F. Thirlwall (RHUL: Royal Holloway, University of London)H-Index: 72
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This study reports a geochemical investigation of two thick basalt sequences, exposed in the Bracco–Levanto ophiolite (northern Apennine, Italy) and in the Balagne ophiolite (central-northern Corsica, France). These ophiolites are considered to represent an oceanward and a continent-near paleogeographic domain of the Jurassic Liguria–Piedmont basin. Trace elements and Nd isotopic compositions were examined to obtain information about: (1) mantle source and melting process and (2) melt–rock react...
5 CitationsSource
#1Anna Bird (University of Hull)H-Index: 6
#2Kathryn Cutts (UFOP: Universidade Federal de Ouro Preto)H-Index: 8
Last. Martin Hand (University of Adelaide)H-Index: 47
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Abstract Central problems in the interpretation of the Neoproterozoic geology of the North Atlantic region arise from uncertainties in the ages of, and tectonic drivers for, Tonian orogenic events recorded in eastern Laurentia and northern Baltica. The identification and interpretation of these events is often problematic because most rock units that record Tonian orogenesis were strongly reworked at amphibolite facies during the Ordovician-Silurian Caledonian orogeny. Lu-Hf and Sm-Nd geochronol...
6 CitationsSource
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