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 8165-8184 of 39126
-
(1998)U-Pb data for plagioclase and sulfide are reported from the Burakovka and Olanga layered mafic-ultramafic complexes in Karelia. These 2.44–2.45 Ga complexes differ in the age of their host rocks and in post-emplacement ...
-
(2001)The assumptions underlying the models used in the literature for obtaining the age of the Earth from terrestrial lead isotopes are severely violated by the complex evolution of the Earth, particularly the extreme chemical ...
-
(2003)The sources of non-anthropogenic Pb in seawater have been the subject of debate. Here we present Pb isotope time-series that indicate that the non-anthropogenic Pb budget of the northernmost Pacific Ocean has been governed ...
-
(2004)The lead isotopic composition of river sediments is reported in the present work for the Earth's major river basins, from old cratonic to young orogenic areas and from subarctic to tropical climates. Sediment samples from ...
-
(2003)Lead sorption efficiencies (sorption per specific surface area) were measured for a number of natural and synthetic Mn and Fe-oxides using a flow-through reactor. The Mn-oxide phases examined included synthetic birnessite, ...
-
(2001)Inspection of available experimental diffusion data shows compensation effect which not only occurs in Pb, Sr and REE diffusion in different minerals, but also occurs in the different elements of the same mineral or the ...
-
(1989)Knowing the lead-isotope composition of potassic feldspars in ore-bearing intrusions should show whether or not endogene ore mineralization is genetically related to them and many sometimes allow their age to be estimated ...
-
(2003)Some stratigrapho-paleogeographic discrepancies have been removed from the interpretation of spatial-temporal relationships between leading factors of morpholithogenesis in the Late Pleistocene of West Siberia. New data ...
-
(2023)Large language models (LLMs) have achieved great success in general domains of natural language processing. In this paper, we bring LLMs to the realm of geoscience with the objective of advancing research and applications ...
-
(2003)The biternate structure of leaves of Liriodendropsis simplex is proved on new original material. The individual variability of the leaflets is analyzed, and the systematics of available finds is revised. During the Cenomanian ...
-
(2001)Compressed sandwich structures, comprising thin stiff faces separated by a thick layer of a soft-core material exhibit behaviour analogous to the geological phenomenon of parasitic folding in multi-layered media. Earlier ...
-
LENGTH SCALES OF MANTLE HETEROGENEITIES AND THEIR RELATIONSHIP TO OCEAN ISLAND BASALT GEOCHEMISTRY (2004)The upper mantle is widely considered to be heterogeneous, possibly comprising a “marble-cake” mixture of heterogeneous domains in a relatively well-mixed matrix. The extent to which such domains are capable of producing ...
-
(1990)Leningradite is the product of fumarole activity in the Great Tolbachik Fissure Eruption. It occurs in relatively small amounts in fumarole incrustations, on the southwestern crest of the second slag cone of the Northern ...
-
(2004)The development of potassic alkaline magmatism in southern Primorye was expressed in eruption of olivine-picroilmenite-leucite basanite along the NE-oriented extensional structure that was regenerated in the Miocene. This ...
-
(1997)A combination of detailed petrography and in situ SIMS 207Pb/206Pb micro-chronometry of monazite has been carried out on samples from the Lewisian high-grade metamorphic terrain, northwest Scotland. Two episodes of ...
-
(2001)We develop a numerical simulation method that can efficiently model the combined effects of large-scale structural variations and small-scale heterogeneities (e.g. random media) on Lg-wave propagation at far regional ...
Now showing items 8165-8184 of 39126