Graeme R. Nicoll

Graeme R. Nicoll
Neftex | NEFTEX · Geochronology

BA (Mod), PhD

About

26
Publications
5,261
Reads
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187
Citations
Additional affiliations
January 2012 - present
Neftex
Neftex
Position
  • Geoscientist
November 2008 - October 2010
The University of Edinburgh
Position
  • PostDoc Position
September 2003 - April 2008
Trinity College Dublin
Position
  • PhD Student

Publications

Publications (26)
Chapter
Full-text available
This is the Non-biostratigraphic Techniques in Exploration chapter of the Exploration Handbook published by Halliburton. The introductory chapter and whole book is freely available at https://www.landmark.solutions/NeftexPredictionArticles/ID/27/The-Role-of-Geology-in-Frontier-Hydrocarbon-Exploration
Article
Full-text available
The Loch Bà ring-dyke and the associated Centre 3 granites represent the main events of the final phase of activity at the Palaeogene Mull igneous complex. The Loch Bà ring-dyke is one of the best exposed ring-intrusions in the world and records intense interaction between rhyolitic and basaltic magma. To reconstruct the evolutionary history of the...
Conference Paper
Full-text available
During the Mesozoic Era, episodes of siliciclastic input onto the dominantly carbonate Arabian shelf form important elements of petroleum plays, creating proven and potential reservoirs, source rocks, and seals. We review the temporal and spatial extent of these siliciclastic episodes in the context of tectonic, climatic, and eustatic events affect...
Conference Paper
Non-biostratigraphic stratigraphy is the subdivision and correlation of rock successions on the basis of certain measurable physical or chemical characteristics of the rock. Some of these enable direct calibration to the geologic timescale (e.g. radiogenic isotope geochronology), others require indirect calibrations via another method (e.g. compari...
Article
Full-text available
Large-volume pyroclastic eruptions are not known from the basalt-dominated British Palaeogene Igneous Province (BPIP), although silicic magmatism is documented from intra-caldera successions in central volcanoes and from small-volume ash-layers in the associated lava fields. Exceptions are the Sgùrr of Eigg (58.7 Ma) and Òigh-sgeir pitchstones in t...
Conference Paper
Plate tectonics and the supercontinental cycle represent a fundamental geological paradigm that can be used to better understand and predict the formation of hydrocarbon and mineral resources and help reduce geological uncertainty and financial risk during exploration. Understanding the tectonic evolution of a region requires the synthesis of many...
Conference Paper
Full-text available
As major mineral discoveries are becoming harder to find, with fewer expressed at the surface, miners are increasingly being driven deeper into the subsurface and into more remote regions. This exposes companies and investors to much greater geological uncertainty and financial risk. Exploration companies increasingly need to think temporally and s...
Article
We present U–Pb (LA-ICP-MS) data on detrital zircon from the Late Precambrian terrigenous rocks of the Baikal Group and Ushakovka Formation, western Cisbaikalia (southern flank of the Siberian craton). The sources of clastic material for the studied sediments are interpreted. The youngest group of detrital zircon grains from the upper Baikal Group...
Article
Full-text available
The first data on the age of detrital zircons are given for Late Precambrian terrigenous rocks of the Baikal Group and Ushakovka Formation of the southern flank of the Siberian Craton. The ages obtained for 348 zircons cover the Paleoarchean to Late Ediacaran period, demonstrate the dynamics of change of sources of the clastic material in the sedim...
Conference Paper
The Taoudeni Basin on the West Africa Craton covers around two million km2 and displays a record of almost continuous sedimentation from the early Neoproterozoic until the end of the Carboniferous. The Neoproterozoic history of the craton is marked by many uncertainties regarding palaeogeography especially its role in the formation and break up of...
Conference Paper
Full-text available
We have dated over 800 detrital zircon grains from the Neoproterozoic sediments within the Taoudeni Basin of Mauritania on the West African craton. This sequence of sediments preserves a relatively condensed mixed continental and marine succession as well as Neoproterozoic glacial and glacially influenced deposits. The underlying Archaean and Birim...
Article
Full-text available
The Southern Mountains Zone of the Rum Central Complex lies inside a major ring fault and comprises an intricate association of country-rock outcrops, breccias and rhyodacite. The breccias and rhyodacite were long thought to be products of subterranean explosion and intrusion, respectively. Here, we report new observations that support re-interpret...
Article
Full-text available
The Rum Igneous Centre comprises two early marginal felsic complexes (the Northern Marginal Zone and the Southern Mountains Zone), along with the later central ultrabasic–basic layered intrusions. These marginal complexes represent the remnants of near-surface to eruptive felsic magmatism associated with caldera collapse, examples of which are rare...
Article
Full-text available
Sr and Nd isotope ratios, together with lithophile trace elements, have been measured in a representative set of igneous rocks and Lewisian gneisses from the Isle of Rum in order to unravel the petrogenesis of the felsic rocks that erupted in the early stages of Palaeogene magmatism in the North Atlantic Igneous Province (NAIP). The Rum rhyodacites...
Article
The peninsula of Ardnamurchan is the most westerly point of the British mainland. The igneous complex is part of the British-Irish Palaeocene Igneous Province, which formed (around 60 Ma) within a zone of crustal stretching and thinning prior to the opening of the North Atlantic. This deeply eroded igneous complex intrudes Proterozoic metasediments...
Article
Full-text available
Crustal anatexis is a common process in the rift-to-drift evolution during continental breakup and the formation of Volcanic Rifted Margins (VRM) systems. 'Early felsic-later mafic' volcanic rock associations on the Continent Ocean Boundary (COB) of the N.Atlantic Ocean have been sampled by ODP drilling on the SE Greenland margin and the the Vøring...
Article
Full-text available
A 200m long segment of the only main road in NW-Gran Canaria is built on landslide deposits near the village of El Risco. Structural mapping and analysis of the topography reveal that the N–S striking landslide head scarp is the upper part of a sub-circular failure surface. The southern side of the landslide is delimited by a much older E–W strike-...
Article
Full-text available
Major volcanic activity on the Isle of Rum commenced with the eruption of thick (>100 m) intracaldera rhyodacite ash-flow sheets fed from steep-sided feeder conduits in the proximity of the Main Ring Fault. Twenty plagioclase phenocrysts of the rhyodacite were analysed using single crystal (40)Ar/(39)Ar laser dating, yielding a mean apparent age of...
Article
The Isle of Rum is one of several igneous centers within the British-Irish Palaeocene Igneous Province formed during crustal stretching and thinning, prior to the opening of the North Atlantic. An elliptical ring fault, 12km across, bounds the igneous centre enclosing remnants of an early felsic phase (stage 1, [1]). These consist of extrusive rhyo...
Conference Paper
The British-Irish Palaeocene Igneous Province (BPIP) is an ideal testing ground for the influence of crustal composition on ascending magmas as four major tectono-stratigraphic terranes are traversed on a transect from Skye and Rum in the North, to the Mourne Mtns, Carlingford and Slieve Gullion in the South. These crustal blocks are bounded by maj...
Article
Major volcanic activity on the Isle of Rum started with eruption of rhyodacite, now preserved as intrusive and extrusive parts of the intra-caldera succession. A thick sequence of intra-caldera ignimbrites and sedimentary breccias are preserved in the north and south of the island. Twenty feldspar crystals of the rhyodacite were dated using Ar/Ar a...

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Project (1)
Archived project
New discoveries and thinking in a 'classic' area for the study of volcanic and magmatic processes.