Richard H. Armstrong

ORCID: 0000-0003-3227-5204
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About
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Research Areas
  • Geological and Geochemical Analysis
  • Geochemistry and Geologic Mapping
  • Geochemistry and Elemental Analysis
  • Paleontology and Stratigraphy of Fossils
  • earthquake and tectonic studies
  • Classical Antiquity Studies
  • Archaeology and ancient environmental studies
  • Psychotherapy Techniques and Applications
  • Geography and Environmental Studies
  • Historical and Linguistic Studies
  • Psychoanalysis, Philosophy, and Politics
  • High-pressure geophysics and materials
  • Jewish Identity and Society
  • Forensic Anthropology and Bioarchaeology Studies
  • Pacific and Southeast Asian Studies
  • Jewish and Middle Eastern Studies
  • Early Modern Spanish Literature
  • Medieval Literature and History
  • Themes in Literature Analysis
  • Shakespeare, Adaptation, and Literary Criticism
  • Psychoanalysis and Psychopathology Research
  • Historical and Religious Studies of Rome
  • Pleistocene-Era Hominins and Archaeology
  • Geological Studies and Exploration
  • Linguistics and language evolution

University of Houston
2008-2023

Australian National University
2006-2022

City University of New York
2021

New York University
2021

Rutgers, The State University of New Jersey
2021

University of Cambridge
2021

Philadelphia University
2021

University of Pennsylvania
2021

University of California, Berkeley
2021

University of Canberra
2013

Abstract Trace elements diffuse negligible distances through the pristine crystal lattice in minerals: this is a fundamental assumption when using them to decipher geological processes. For example, reliable use of mineral zircon (ZrSiO 4 ) as U-Th-Pb geochronometer and trace element monitor requires minimal radiogenic isotope mobility. Here, atom probe tomography, we document effects crystal–plastic deformation on atomic-scale elemental distributions revealing sub-micrometre-scale...

10.1038/ncomms10490 article EN cc-by Nature Communications 2016-02-12

Stable-isotopic analyses of human bone, now an established aid to dietary reconstruction in archaeology, represent the diet as averaged over many years. Separate analysis different skeletal components enables changes and place residence be tracked, giving a fuller life-history for long-dead individuals.

10.1017/s0003598x00064693 article EN Antiquity 1995-06-01

Abstract The Pan-African Damara orogenic system records Gondwana amalgamation involving serial suturing of the Congo–São Francisco and Río de la Plata cratons (North Gondwana) from 580 to 550 Ma, before with Kalahari–Antarctic (South as part 530 Ma Kuunga–Damara orogeny. Closure Adamastor Ocean was diachronous Araçuaí Belt southwards, peak sinistral transpressional deformation followed by craton overthrusting foreland basin development at 580–550 in Kaoko 545–530 Gariep Belt. Peak...

10.1144/sp294.14 article EN Geological Society London Special Publications 2008-01-01

The Skorpion zinc deposit in southwestern Namibia comprises a significant nonsulfide orebody (24.6 Mt at 10.6% Zn) and subordinate amounts of primary base metal sulfide mineralization, which structurally underlies the ores depth. host rocks blind, relict mineralization consist mixed volcano-sedimentary sequence Neoproterozoic age that has formed an initial continental rift system between Kalahari cratonic province Rio de la Plata province. metavolcanic subvolcanic display distinct bimodal...

10.2113/gsecongeo.98.4.749 article EN Economic Geology 2003-06-01

ABSTRACT: The Cabo Frio Tectonic Domain is composed of a Paleoproterozoic basement tectonically interleaved with Neoproterozoic supracrustal rocks (Buzios-Palmital successions). It in contact the Neoproterozoic-Cambrian Ribeira Orogen along SE Brazilian coast. was part at least three continental margins: (a) 1.97 Ga; (b) 0.59 - 0.53 (c) 0.14 Ga to today. consists magmatic arc 1.99 1.94 Ga. Zircon cores show 2.5 2.6 inheritance from ancient margin Congo Craton. During Ediacaran, this domain...

10.1590/2317-4889201620150025 article EN cc-by Brazilian Journal of Geology 2016-06-01

10.5860/choice.43-1247 article EN Choice Reviews Online 2005-10-01

Research Article| March 01, 2007 The Bushmanland Group supracrustal succession, Aggeneys, Bushmanland, South Africa: Provenance, age of deposition and metamorphism Russell Bailie; Bailie Department Geological Sciences, University Cape Town, Private Bag, Rondebosch, 7700, Africa, Present address: Paleoproterozoic Mineralisation Group, Dept. Geology, Johannesburg, P.O. Box 524, Auckland Park, 2006, e-mail: russellb@postgrad.uj.ac.za Search for other works by this author on: GSW Google Scholar...

10.2113/gssajg.110.1.59 article EN South African Journal of Geology 2007-03-01

Research Article| March 01, 2007 Composition and single zircon U-Pb emplacement metamorphic ages of the Aggeneys Granite Suite, Bushmanland, South Africa Russell Bailie; Bailie Department Geological Sciences, University Cape Town, Private Bag, Rondebosch, 7700, Africa, Present address: Paleoproterozoic Mineralisation Group, Dept. Geology, Johannesburg, P.O. Box 524, Auckland Park, 2006, e-mail: russellb@postgrad.uj.ac.za Search for other works by this author on: GSW Google Scholar Richard...

10.2113/gssajg.110.1.87 article EN South African Journal of Geology 2007-03-01
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