Zobrazeno 1 - 10
of 39
pro vyhledávání: '"C. Terry Williams"'
Publikováno v:
Mineralogy and Petrology. 111:499-509
Tungsten-rich oxycalciobetafite occurs in complex Ti-rich hydrothermal veins emplaced within dolomite marble in the contact aureole of the Adamello batholith, northern Italy, where it occurs as overgrowths on zirconolite. The betafite is weakly zoned
Publikováno v:
Acta Geologica Polonica
The cerium anomalies preserved in the Chalk have been investigated as possible palaeoredox indicators of the Late Cretaceous Sea and its sediment. This has been based upon over a hundred new rare earth element analyses of selected samples and grain s
Autor:
Reimar Seltmann, D. Rhede, C. Terry Williams, Samuel Niedermann, Reiner Klemd, Ulf Kempe, Torsten Graupner
Publikováno v:
Mineralium Deposita
Mineral assemblages present within the Charmitan gold(-tungsten) quartz-vein mineralization have been investigated for their cathodoluminescence behaviour, chemical composition and noble gas isotope systematics. This inventory of methods allows for t
Autor:
Tamás Weiszburg, Teresa Jeffries, Erzsébet Tóth, Éva Bertalan, András Bartha, Ildikó Cora, C. Terry Williams
Publikováno v:
Chemical Geology. 269:312-328
Samples of glauconite, representing different stages of glauconitisation, as well as different formation environments, were analysed for rare earth elements (REE) and other trace elements using a combination of bulk sample and spatially-resolved in s
Publikováno v:
Physics and Chemistry of Minerals. 37:333-342
The photoluminescence properties of synthetic zircon, ZrSiO4, doped with REE3+ (REE = Pr, Sm, Eu, Gd, Dy, Ho, Er) were investigated using combined excitation and emission spectroscopy. All samples showed luminescence characteristics of intra-ion ener
Publikováno v:
Chemical Geology
86. Jahrestagung der Deutschen Mineralogischen Gesellschaft (Berlin 2008)
86. Jahrestagung der Deutschen Mineralogischen Gesellschaft (Berlin 2008)
A granitic pegmatite associated with the Monte Bruffione granodiorite in the Tertiary Adamello Massif, Italy, consists primarily of albite, potassium feldspar, muscovite, quartz, and spessartine (graphic intergrowths with quartz). As accessory minera
Publikováno v:
Chemical Geology. 247:229-241
High resolution distribution of magnesium and strontium determined by Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS) are presented in this study for Recent brachiopod shells. The concentration of magnesium and strontium decre
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 249:897-902
The precision and accuracy of four different X-ray analytical techniques at the micrometre level, PIXE–RBS, PIXE–PIXE, μ-SRXRF and WDS, have been investigated and compared. A range of different reference materials was considered for this purpose
Publikováno v:
Neues Jahrbuch für Mineralogie - Abhandlungen. 182:109-121
Publikováno v:
Lithos. 82:71-83
In the granitic rocks of the Western Carpathians, xenotime-(Y) occurs both as a late-stage magmatic mineral, and as a secondary post-magmatic phase. Magmatic xenotime occurs with monazite and displays minor compositional zonation involving Si, Th and