Browsing by Classification "GB"
Now showing items 1-20 of 45
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Absence of molybdenum isotope fractionation during magmatic differentiation at Hekla volcano, Iceland
(2015-08-01) - Journal articleThis study investigates the behaviour of molybdenum (Mo) isotopes during magmatic differentiation. Molybdenum isotope compositions, as well as concentrations of rare earth elements and a selection of trace elements, have ... -
Access to Higher Education for Scottish rural communities : an exploratory analysis
(University of St Andrews, 2015-08-28) - ReportTraditional socio-economic factors cannot solely explain why state secondary schools located in Scottish rural communities tend to have (i) greater variation of progressions to Higher Education (HE) year on year than other ... -
Anticlockwise P-T evolution at ∼280 Ma recorded from ultrahigh-temperature metapelitic granulite in the Chinese Altai orogenic belt, a possible link with the Tarim mantle plume?
(2014-11) - Journal articleAn ultrahigh-temperature (UHT) metapelitic granulite assemblage consisting of garnet(g)–spinel(sp)–orthopyroxene(opx)-sillimanite(sil)–cordierite(cd)–ilmenite(ilm)–biotite(bi)–plagioclase(pl)–quartz(q) occurs within ... -
Assembly of the Lhasa and Qiangtang terranes in central Tibet by divergent double subduction
(2015) - Journal articleIntegration of lithostratigraphic, magmatic, and metamorphic data from the Lhasa-Qiangtang collision zone in central Tibet (including the Bangong suture zone and adjacent regions of the Lhasa and Qiangtang terranes) indicates ... -
Atmospheric drying as the main driver of dramatic glacier wastage in the southern Indian Ocean
(2016-09-01) - Journal articleThe ongoing retreat of glaciers at southern sub-polar latitudes is particularly rapid and widespread. Akin to northern sub-polar latitudes, this retreat is generally assumed to be linked to warming. However, no long-term ... -
Atmospheric origins of perchlorate on Mars and in the Atacama
(2010) - Journal articleIsotopic studies indicate that natural perchlorate is produced on Earth in arid environments by the oxidation of chlorine species through pathways involving ozone or its photochemical products. With this analogy, we propose ... -
Boron isotope evidence for oceanic carbon dioxide leakage during the last deglaciation
(2015-02-12) - Journal articleAtmospheric CO2 fluctuations over glacial-interglacial cycles remain a major challenge to our understanding of the carbon cycle and the climate system. Leading hypotheses put forward to explain glacial-interglacial atmospheric ... -
Challenging the sensitivity limits of paleomagnetism : magnetostratigraphy of weakly magnetized Guadalupian-Lopingian (Permian) limestone from Kyushu, Japan
(2015-01-15) - Journal articleDespite their utility for bio- and chemostratigraphy, many carbonate platform sequences have been difficult to analyze using paleomagnetic techniques due to their extraordinarily weak natural remanent magnetizations (NRMs). ... -
Channel and floodplain change analysis over a 100-year period : Lower Yuba River, California
(2010-07-19) - Journal articleHydraulic gold mining in the Sierra Nevada, California (1853–1884) displaced ~1.1 billion m3 of sediment from upland placer gravels that were deposited along piedmont rivers below dams where floods can remobilize them. ... -
Copper isotope evidence for large-scale sulphide fractionation during Earth’s differentiation
(2015-06-04) - Journal articleAbstract The differentiation of Earth into a metallic core and silicate mantle left its signature on the chemical and isotopic composition of the bulk silicate Earth (BSE). This is seen in the depletion of siderophile ... -
Crustal growth during island arc accretion and transcurrent deformation, Natal Metamorphic Province, South Africa : new isotopic constraints
(2015-08) - Journal articleThe Natal Metamorphic Province consists of, from north to south, the Tugela, Mzumbe, and Margate terranes. These were accreted to the southeastern margin of the Kaapvaal Craton in the late Mesoproterozoic, and followed by ... -
Debris entrainment and landform genesis during tidewater glacier surges
(2015-08-22) - Journal articleThe englacial entrainment of basal debris during surges presents an opportunity to investigate processes acting at the glacier bed. The subsequent melt-out of debris-rich englacial structures during the quiescent phase ... -
Early Paleozoic and Early Mesozoic intraplate tectonic and magmatic events in the Cathaysia Block, South China
(2015-08-08) - Journal articleThe geodynamic framework of the South China Craton in the Early Paleozoic and Early Mesozoic has been modeled as developing through either oceanic convergence or intracontinental settings. On the basis of an integrated ... -
The effect of sea-ice loss on beluga whales (Delphinapterus leucas) in West Greenland
(2010) - Journal articleAn aerial survey was conducted to estimate the abundance of belugas (Delphinapterus leucas) on their wintering ground in West Greenland in March–April 2006 and 2008. The survey was conducted as a double platform aerial ... -
Effects of reduced salinity on the photosynthetic characteristics and intracellular DMSP concentrations of the red coralline alga, Lithothamnion glaciale
(2015-05) - Journal articleMid- to high-latitude fjordic coastal environments experience naturally variable salinity regimes. Climate projections suggest that freshwater input into the coastal ocean will increase in the future, exposing coastal ... -
Energy dependence of radioluminescence spectra from strontium titanate
(2015-10) - Journal articleAbstract X-ray excited luminescence spectra of strontium titanate are reported over the temperature range from 20-300 K. The range includes several crystalline phases, each with different emission spectra. The signals are ... -
Enhanced rock-slope failure following ice-sheet deglaciation : timing and causes
(2014-06-14) - Journal articleThe temporal pattern of rock-slope failures (RSFs) following Late Pleistocene deglaciation on tectonically stable terrains is controversial: previous studies variously suggest (1) a rapid response due to removal of supporting ... -
Former dynamic behaviour of a cold-based valley glacier on Svalbard revealed by basal ice and structural glaciology investigations
(2015-05) - Journal articleLarge numbers of small valley glaciers on Svalbard were thicker and more extensive during the Little Ice Age (LIA), demonstrated by prominent ice-cored moraines up to several kilometres beyond present-day margins. The ... -
The glacial mid-depth radiocarbon bulge and its implications for the overturning circulation
(2015) - Journal articlePublished reconstructions of radiocarbon in the Atlantic sector of the Southern Ocean indicate that there is a mid-depth maximum in radiocarbon age during the last glacial maximum (LGM). This is in contrast to the modern ... -
Global continental weathering trends across the Early Permian glacial to postglacial transition : correlating high- and low-paleolatitude sedimentary records
(2014-10) - Journal articleTime-equivalent Early Permian sedimentary successions from high-latitude Gondwana basins and from equatorial accumulations in North China, covering the glacial to postglacial transition, display correlatable trends in ...