Browsing by Title
- DSpace Home
- →
- Browsing by Title
JavaScript is disabled for your browser. Some features of this site may not work without it.
Browsing by Title
Now showing items 9965-9984 of 39124
-
(2003)The introduction of a fifth group of amphiboles, the Na-Ca-Mg-Fe-Mn-Li group, defined by 0.50 < (B)(Mg,Fe2+,Mn2+,Li) < 1.50 and 0.50 less than or equal to (B)(Ca,Na) less than or equal to 1.50 atoms per formula unit, with ...
-
(2004)The introduction of a fifth amphibole group, the Na-Ca-Mg-Fe-Mn-Li group, defined by 0.50 < (B)(Mg,Fe2+,Mn2+,Li) < 1.50 and 0.50 less than or equal to (B)(Ca,Na) less than or equal to 1.50 apfu (atoms per formula unit), ...
-
(1997)The International Mineralogical Association's approved amphibole nomenclature has been revised in order to simplify it, make it more consistent with divisions generally at 50%, define prefixes and modifiers more precisely ...
-
(1997)The International Mineralogical Association's approved amphibole nomenclature has been revised to simplify it, make it more consistent with divisions generally at 50%, define prefixes and modifiers more precisely, and ...
-
(2003)Newtonian viscosities of 19 natural multicomponent melts ranging in composition from basanite through phonolite and trachyte, to dacite have been analysed in the range of 100-1012 Pa s. These data, together with the results ...
-
(2002)A natural Ca-rich pigeonite (En47Fs43Wo10), free of augite exsolution products, was studied by in situ high-temperature single-crystal X-ray diffraction. The sample, monoclinic P21/c (a=9.719(7) A, b=8.947(9) A, c=5.251(3) ...
-
(2003)The paleomagnetic assumption that the Earth's magnetic field is reduced to a geocentric axial dipole (GAD) when sufficiently sampled has been called into question for Mesozoic and earlier times. It has been suggested, for ...
-
(2003)The partitioning of rare-earth elements (REEs: Gd and multiple REEs), Sr, and Mn between fluorapatite and CaF2-rich melts was investigated over a wide range of REE concentrations (i.e., from 0.8 ± 0.1 to 25,000 ± 2600 ppm ...
-
(2001)The lithosphere of the Earth is structured as a hierarchical system of volumes of different sizes, from about 10 tectonic plates to about 1025 grains of rock. Their relative movement against the forces of friction and ...
-
(2002)The development of temporary and permanent broad-band seismic arrays reinforces the need for advanced interpretation techniques in surface-wave analysis. We present a new method based on 2-D paraxial ray theory of inverting ...
-
(2006)Our examination of nine CM chondrites that span the aqueous alteration sequence leads us to conclude that compact dark fine mantles surrounding chondrules and inclusions in CM chondrites are not discrete fine-grained rims ...
-
(2002)Non-pegmatitic occurrences of Be minerals constitute a diverse set of geologic environments of considerable mineralogical and petrological interest; they currently provide the majority of the world’s Be ore and emeralds ...
-
NON-RACEMIC AMINO ACIDS IN THE MURRAY AND MURCHISON METEORITES - OPTICAL ACTIVITY IN ORGANIC MATTER (2000)Small (1.0-9.2%) l-enantiomer excesses were found in six α-methyl-α-amino alkanoic acids from the Murchison (2.8-9.2%) and Murray (1.0-6.0%) carbonaceous chondrites by gas chromatography-mass spectroscopy of their ...
-
(1998)Experiments demonstrate that partial evaporation of solid silica at 1600-1700°C and low pressure (10-9 bar) results in enrichment of 18O/16O and 17O/16O in solid products. Evaporative residues formed in H2 or N2 gas at ...
-
(2002)This work deals with reconstruction of non-smooth solutions of the inverse gravimetric problem. This inverse problem is very ill-posed, its solution is non-unique and unstable. The stable inversion method requires ...
-
(2001)For dealing with hydrological non-stationarity in flood frequency modelling (FFM) and hydrological design, it is necessary to account for trends. Taking the case of at-site FFM, statistical parametric techniques are discussed ...
-
NON-STATIONARY APPROACH TO AT-SITE FLOOD FREQUENCY MODELLING II. WEIGHTED LEAST SQUARES ESTIMATION (2001)This is the second of the three-part paper and generalises the least squares method to the weighted least squares (WLS) method in order to deal with the trend in the first two moments. The generalised method applies when ...
-
NON-STATIONARY APPROACH TO AT-SITE FLOOD FREQUENCY MODELLING. III. FLOOD ANALYSIS OF POLISH RIVERS (2001)This paper, the last of a three-part paper, investigates into trends in annual maximum flows of Polish rivers using 39 flow series for a period of 70 years from 1921 to 1990. The gradients of trends in the mean and the ...
-
(2003)The presence of significant non-stationarity in a hydrologic time series cannot be ignored when estimating design values for future time horizons. This paper introduces a second-order non-stationary approach to pooled flood ...
-
(2003)Most treatments of the Phanerozoic evolution of the carbon dioxide content of the atmosphere (PCO2) assume a steady state closed system. Release of CO2 by mantle degassing and by biogenic precipitation of carbonates and ...
Now showing items 9965-9984 of 39124