Now showing items 301-307 of 307
Heat capacities of TiO2-bearing silicate liquids: Evidence for anomalous changes in configurational entropy with temperature
(Elsevier, 1993-07)
The heat capacities of several TiO2-bearing silicate glasses and liquids containing Cs2O, Rb2O, Na2O, K2O, CaO, MgO, or BaO have been measured to 1100 K using a differential scanning calorimeter and to 1800 K using a Setaram ...
Lead isotopic composition of the oldest volcanic rocks of the eastern greater antilles island ARC
(Elsevier, 1987-03-20)
Pb isotopic analyses for rocks from the early Cretaceous Los Ranchos Formation, which is the basal volcanic assemblage in the Dominican Republic, fall on a short linear array of shallow slope in a 207Pb/204Pb vs. 206Pb/204Pb ...
A transmission electron microscope study of white mica crystallite size distribution in a mudstone to slate transitional sequence, North Wales, UK
(Springer-Verlag, 1990-12)
High-resolution transmission electron microscopy (HRTEM) measurements of the thickness of white mica crystallites were made on three pelite samples that represented a prograde transition from diagenetic mudstone though ...
Five centuries of climate change in Australia: the view from underground Pollack, H. N., Huang, S. and Smerdon, J. E. 2006. Five centuries of climate change in Australia: the view from underground. J. Quaternary Sci. , Vol. 21 pp. 701–706. ISSN 0267–8179.
(John Wiley & Sons, Ltd., 2006-10)
Fifty-seven borehole temperature profiles from across Australia are analysed to reconstruct a ground surface temperature history for the past five centuries. The five-hundred-year reconstruction is characterised by a ...
Pliocene and Pleistocene geologic and climatic evolution in the San Luis Valley of south-central Colorado
(Elsevier, 1992-07)
Sediments of the Alamosa Formation spanning the upper part of the Gauss and most of the Matuyama Chrons were recovered by coring in the high (2300 m) San Luis Valley of south-central Colorado. The study site is located at ...
High-resolution X-ray texture goniometry
(Elsevier, 1994-07)
High-resolution X-ray texture goniometry (HRXTG) significantly improves peak/background ratios and allows for the determination of crystallographic preferred fabrics of small regions (2) in heterogeneously deformed rocks. ...
Crystal chemistry of a Mg-vesuvianite and implications of phase equilibria in the system CaO-MgO-Al 2 O 3 -SiO 2 -H 2 O-CO 2 1
(Blackwell Publishing Ltd, 1985-06)
Chemical analysis (including H 2 , F 2 , FeO, Fe 2 O 3 ) of a Mg-vesuvianite from Georgetown, Calif., USA, yields a formula, Ca 18.92 Mg 1.88 Fe 3+ 0.40 Al 10.97 Si 17.81- O 69.0.1 (OH) 8.84 F 0.14 , in good agreement on ...