Browsing Geology (Scholarly Publications) by Author "Chew, David"
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Apatite Chlorine Concentration Measurements by LA-ICP-MS
Kamber, Balz; Chew, David; Stock, Michael (2014)Apatite incorporates variable and significant amounts of halogens (mainly F and Cl) in its crystal structure, which can be used to determine the initial F and Cl concentrations of magmas. The amount of chlorine in the ... -
Basic volcanism contemporaneous with the Sturtian glacial episode in NE Scotland
Chew, David (2010)The Dalradian Supergroup contains three distinct glacigenic units, formerly termed `Boulder Beds?, which are correlated with widespread Neoproterozoic glaciations. The oldest and thickest unit, the Port Askaig Formation, ... -
Chemical Abrasion Applied to LA-ICP-MS U-Pb Zircon Geochronology
Crowley, Quentin; Chew, David (2014)Zircon (ZrSiO4) is the most commonly used mineral in U–Pb geochronology. Although it has proven to be a robust chronometer, it can suffer from Pb-loss or elevated common Pb, both of which impede precision and accuracy of ... -
Combined apatite fission track and U-Pb dating by LA-ICPMS and its application in apatite provenance analysis
Chew, David (Mineralogical Association of Canada Short Course (v42), 2012) -
Early mafic magmatism and crustal anatexis on the Isle of Rum: evidence from the Am M?m intrusion breccia
Chew, David (2009)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 ... -
Elemental and isotopic behaviour of Zn in Deccan basalt weathering profiles: Chemical weathering from bedrock to laterite and links to Zn deficiency in tropical soils
SUHR, NILS THORSTEN; Schoenberg, Ronny; Chew, David; Rosca, Carolina; Widdowson, Mike; Kamber, Balz S. (2018)Zinc (Zn) is a micronutrient for organisms and essential for plant growth, therefore knowledge of its elemental cycling in the surface environment is important regarding wider aspects of human nutrition and health. To ... -
Geochronology of the Tardree Rhyolite Complex, Northern Ireland: Implications for zircon fission track studies, the North Atlantic Igneous Province and the age of the Fish Canyon sanidine standard
Chew, David (2011)The British-Irish Palaeogene Igneous Province (BIPIP) is part of the larger North Atlantic Igneous Province and includes the lava fields of Antrim, Mull, and Skye. The Tardree Rhyolite Complex (TRC) in Northern Ireland ... -
Hidden Archaean and Palaeoproterozoic crust in NW Ireland? Evidence from zircon Hf isotopic data from granitoid intrusions
Chew, David (2009)The presence of major crystalline basement provinces at depth in NW Ireland is inferred from in situ Hf isotope analysis of zircons from granitoid rocks that cut structurally overlying metasedimentary rocks. Granitoids in ... -
High temperature (>350?C) thermochronology and mechanisms of Pb loss in apatite
Chew, David (2014) -
LA-ICP-MS U-Pb apatite dating of Lower Cretaceous rocks from teschenite-picrite association in the Silesian unit (southern Poland)
Chew, David (2014)The main products of volcanic activity in the teschenite-picrite association (TPA) are shallow, sub-volcanic intrusions, which predominate over extrusive volcanic rocks. They comprise a wide range of intrusive rocks which ... -
LA-ICP-MS U-Pb dating and REE patterns of apatite from the Tatra Mountains, Poland as a monitor of the regional tectonomagmatic activity
Chew, David (2014)This study presents apatite LA-ICP-MS U-Pb age and trace elements concentrations data from different granite types from the Tatra Mountains, Poland. Apatite from monazite and xenotime-bearing High Tatra granite was dated ... -
Microanalysis of Cl, Br and I in apatite, scapolite and silicate glass by LA-ICP-MS
Tomlinson, Emma; Chew, David; Mc Kenna, Cora (2020)Constraining the abundance and distribution of halogens in geological materials has the potential to provide novel insights into a broad range of earth system processes (e.g. metasomatism, melting, volatile cycling and ore ... -
Neoproterozoic crystalline exotic clasts in the Polish Outer Carpathian flysch: remnants of the Proto-Carpathian continent?
Chew, David; Gawęda, Aleksandra; Golonka, J.; Waśkowska, A.; Szopa, K.; Starzec, K.; Wieczorek, A. (2019)Crystalline exotic boulders within the sedimentary sequences of the Outer Carpathians likely represent Proto-Carpathian basement, which was exposed and eroded during the Mesozoic and Cenozoic evolution of the Western ... -
Petrology and dating of the Permian lamprophyres from the Malá Fatra Mts. (Western Carpathians, Slovakia)
Chew, David; Spišiak, Ján; Vetráková, Lucia; Ferenc, Štefan; Mikuš, Tomáš; Šimonová, Viera; Bačík, Peter (2018)Calc-alkaline lamprophyres are known from several localities in the Malá Fatra Mountains. They form dykes (0.5-3 m) of varying degree of alteration that have intruded the surrounding granitoid rocks which are often ... -
Precambrian olistoliths masquerading as sills from Death Valley, California
Chew, David (2018) -
Re-Os geochronology of the Neoproterozoic - Cambrian Dalradian Supergroup of Scotland and Ireland: Implications for Neoproterozoic stratigraphy, glaciations and Re-Os systematics
Chew, David (2011)New Re-Os geochronology for the Ballachulish Slate Formation of the Dalradian Supergroup, Scotland yields a depositional age of 659.6 ? 9.6 Ma. This age represents the first successful application of the Re-Os system to ...