Browsing ELibrary by Subject "ZIRCON"
- DSpace Home
- →
- Геология России
- →
- ELibrary
- →
- Browsing ELibrary by Subject
JavaScript is disabled for your browser. Some features of this site may not work without it.
Browsing ELibrary by Subject "ZIRCON"
Now showing items 1-20 of 41
-
(2006)The results of ~4000 LA-lCP-MS analyses in 152 thin sections from common crustal rocks reveal that several rock-forming minerals contain tens to a few thousand ppm of Zr. The highest concentrations of Zr are found in ...
-
(2002)Thorough understanding of the shock metamorphic signatures of zircon could be the basis for the use of this mineral as a powerful tool for the study of old, deeply eroded, and metamorphically overprinted impact structures ...
-
(2006)To elucidate the age and origin of seamounts in the eastern North Atlantic, 54 titanite and 10 zircon fractions were dated by the U-Pb chronometer, and initial Pb, Sr, and Hf isotope ratios were measured in feldspars and ...
-
(2006)Zircon and rutile are common accessory minerals whose essential structural constituents, Zr, Ti, and Si can replace one another to a limited extent. Here we present the combined results of high pressure–temperature experiments ...
-
(2006)The timing of ultra-high pressure (UHP) metamorphism has been difficult to determine because of a lack of age constraints on crucial events, especially those occurring on the prograde path. New Sensitive High-Resolution ...
-
(2001)Zircon crystallized from felsic magmas typically (if not ubiquitously) develop compositional growth zonation that is easily imaged by cathodoluminescence (CL). This zonation represents inherently unstable chemical gradients ...
-
(2001)Isotopic composition of zirconium from eight zircon and two baddeleyite samples including meteoritic zircon have been measured using a laser ablation-multiple collector-inductively coupled plasma mass spectrometer ...
-
(2006)The trace element compositions of Hadean zircons have been used in two ways to argue for the existence of Hadean continental crust. One argument is based on low crystallization temperatures of Hadean zircons that have been ...
-
EFFECTS OF NATURAL RADIATION DAMAGE ON BACK-SCATTERED ELECTRON IMAGES OF SINGLE CRYSTALS OF MINERALS (2006)Generally, it has been assumed that signal intensity variations in back-scattered electron (BSE) images of minerals are mainly controlled by chemical heterogeneity. This is especially true for images of single crystals, ...
-
(1999)In recent years, apparently shock-induced and, thus, impact-characteristic microdeformations, in the form of planar microdeformation features and so-called strawberry (granular) texture, have been observed in zircons in ...
-
(2003)Increasing temperature causes fading of fission tracks (FTs) in minerals, which has been quantified by many laboratory heating experiments in atmosphere. In order to elucidate whether or not FT annealing at hydrothermally ...
-
(2006)Fifteen apatite samples and five zircon samples from volcanic rocks and granites in Bogda - Harlik mountains were analysed. The apatite ages range from 109.3 to 11.9Ma and the zircon ages are within the range 81. 7-56.8 ...
-
(1997)The internal structure of zircon is commonly revealed by back-scattered electron (BSE) images. Grains from a 750-700 Ma old calc-alkaline mafic metatonalite from southernmost Brazil show relict igneous faces, irregular and ...
-
(2003)Fission track (FT) analysis of zircon from rhyolite and sandstone samples of Ministry of International Trade and Industry (MITI)-Nishikubiki and MITI-Mishima boreholes has given additional constraints on the temperature ...
-
(2006)The North-East Greenland eclogite province is divided into a western, central and eastern block by the sinistral Storstrømmen shear zone in the west and the dextral Germania Land deformation zone in the east. A family of ...
-
(2006)Granulite xenoliths from the Cretaceous-Paleogene Tuoyun basalts in the southwestern Tianshan area (NW China) are mainly pyroxene granulite and olivine granulite, with minor garnet granulite and quartz granulite. They can ...
-
(2002)The concentrations of all rare earth elements (REE: La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu) in silicate glass, apatite and zircon were measured by an ion microprobe method with a high mass resolving power ...
-
(2006)Zircon populations of Neoproterozoic and early Paleozoic age occur in metabasites of a high-pressure amphibolite-facies unit of the Austroalpine basement south of the Tauern Window. The host rocks for these zircons are ...
-
(2006)Dikes of albitite cross-cut two massifs of serpentinized lherzolite in the Pyrénées, France. At Espéchèe (Hautes-Pyrénées), they are corundum-bearing, whereas at Urdach (Pyrénées-Atlantiques), some dikes contain corundum, ...
-
(2006)Dikes of pegmatitic albitite intrude serpentinized lherzolite at Urdacb and Espéchère, two ultramatic Alpine-type bodies from the western Pyrénées, France. The rocks exhibit mineralogical features matching those of xenoliths ...
Now showing items 1-20 of 41