A5075859960- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Geochemistry and Geologic Mapping
- High-pressure geophysics and materials
- Geological and Tectonic Studies in Latin America
- Geology and Paleoclimatology Research
- Paleontology and Stratigraphy of Fossils
- Geochemistry and Elemental Analysis
- Geological and Geophysical Studies
- Geological formations and processes
- Hydrocarbon exploration and reservoir analysis
- Geological Studies and Exploration
- Geological and Geophysical Studies Worldwide
- Geochemistry and Geochronology of Asian Mineral Deposits
- Isotope Analysis in Ecology
- Geological Modeling and Analysis
- Mine drainage and remediation techniques
- Mineralogy and Gemology Studies
- Radioactive element chemistry and processing
- Species Distribution and Climate Change
- Marine and environmental studies
- Polar Research and Ecology
- Astro and Planetary Science
- Methane Hydrates and Related Phenomena
- Mineral Processing and Grinding
Cardiff University
2016-2025
Memorial University of Newfoundland
1982-2021
Geoscience BC
2019
St. John's School
2016
Newfoundland and Labrador Centre for Applied Health Research
2016
University of Leicester
1995-2011
Kingston University
2010
Max Planck Institute for Chemistry
2007
V.I. Vernadsky Institute of Geochemistry and Analytical Chemistry
2007
Russian Academy of Sciences
2007
Plate tectonic processes introduce basaltic crust (as eclogite) into the peridotitic mantle. The proportions of these two sources in mantle melts are poorly understood. Silica-rich formed from eclogite react with peridotite, converting it to olivine-free pyroxenite. Partial this hybrid pyroxenite higher nickel and silicon but poorer manganese, calcium, magnesium than peridotite. Olivine phenocrysts' compositions record differences were used quantify contributions pyroxenite-derived mid-ocean...
Many diagrams conventionally used to classify igneous rocks utilize mobile elements, which commonly renders them unreliable for classifying from the geological record. The K2O–SiO2 diagram, subdivide volcanic arc into rock type (basalts, basaltic andesites, dacites and rhyolites) series (tholeiitic, calc-alkaline, high-K calc-alkaline shoshonitic), is particularly susceptible effects of alteration. However, by using Th as a proxy K2O Co SiO2 it possible construct topologically similar...
The term Anthropocene, proposed and increasingly employed to denote the current interval of anthropogenic global environmental change, may be discussed on stratigraphic grounds.A case can made for its consideration as a formal epoch in that, since start Industrial Revolution, Earth has endured changes sufficient leave signature distinct from that Holocene or previous Pleistocene interglacial phases, encompassing novel biotic, sedimentary, geochemical change.These changes, although likely...
The Cenomanian–Turonian boundary (90.4 Ma) represents a major period of worldwide environmental disturbance. physical manifestations this are: elevated atmospheric and oceanic temperatures; significant sea-level transgression; widespread anoxia, leading to the formation black shales, extinction 26% all genera. Elevated δ 13 C values enrichment trace elements in sediments, combined with reduction 87 Sr/ 86 Sr, also imply severe perturbation. At time crustal production rates reached their...
Accreted terranes comprising Mid to Late Cretaceous picrites, basalts and dolerites occur in three north–south trending belts western Colombia, the Central Cordillera, Western Cordillera along Pacific coast. The geochemistry of these rocks is consistent with an oceanic plateau (plume-related) origin, they most probably formed as part Caribbean plateau. These igneous display small but significant inter-cordillera variations, being younger more depleted incompatible trace element ratios (and...
Research Article| April 01, 2005 Tectonic evolution of the Caribbean and northwestern South America: The case for accretion two Late Cretaceous oceanic plateaus Andrew C. Kerr; Kerr 1School Earth, Ocean Planetary Sciences, Cardiff University, Main Building, Park Place, CF10 3YE, UK Search other works by this author on: GSW Google Scholar John Tarney 2Department Geology, Leicester University Road, LE1 7RH, Author Article Information Publisher: Geological Society America Received: 13 Aug 2004...
Abstract Subduction polarity reversal usually involves the break off or tearing of downgoing plate (DP) along continent-ocean transition zone, in order to initiate subduction overriding (OP) with opposite polarity. We propose that can also be caused by DP-OP coupling and account for early Paleozoic geological relationships Western Kunlun orogenic belt northwestern Tibetan Plateau. Our synthesis elemental isotopic data reveals transient (~2 m.y.) changes sources arc magmatism southern...
Research Article| November 01, 1999 A new plate tectonic model of the Caribbean: Implications from a geochemical reconnaissance Cuban Mesozoic volcanic rocks Andrew C. Kerr; Kerr 1Department Geology, University Leicester, Road, Leicester LE1 7RH, United Kingdom Search for other works by this author on: GSW Google Scholar Manuel A. Iturralde-Vinent; Iturralde-Vinent 2Museo Nacional de Historia Natural, Obispo No. 61, Plaza Armas, La Habana Vieja 10100, Cuba D. Saunders; Saunders Tanya L....
Western Ecuador consists of a complex tectonic mélange oceanic terranes accreted to the continental margin from Late Cretaceous Eocene time. New geochemical data these (arising 5 year British Geological Survey mapping programme) indicate that they comprise rocks variety settings: thickened (and relatively unsubductable) plateau basalts, through island-arc tholeiites, with occasional more calc-alkaline lavas, back-arc basin basalt sequences. This study has enabled us construct new geodynamic...
Research Article| September 01, 1995 Depleted mantle-plume geochemical signatures: No paradox for plume theories Andrew C. Kerr; Kerr 1Department of Geology, University Leicester, Road, Leicester LE1 7RH, United Kingdom Search other works by this author on: GSW Google Scholar D. Saunders; Saunders John Tarney; Tarney Neil H. Berry; Berry Victoria L. Hards 2Department Geological Sciences, Durham, South Durham DH1 3LE, Geology (1995) 23 (9): 843–846....
Abstract: In this paper we reassess the geochronology and geochemistry of three dredge hauls from SE corner Aves Ridge (Caribbean Sea) originally sampled in 1968 by Duke University's R.V. Eastward . Two consist light rare earth element-enriched granitoids with a U–Pb zircon emplacement age 75.9 ± 0.7 Ma. A further haul contains mostly calc-alkaline island arc basaltic andesites uncertain age. Petrological, trace element isotopic constraints indicate that have an oceanic crustal source were...