Now showing items 31-40 of 273
The effect of Al 3+ , Fe 3+ , and Ti 4+ on the configurational heat capacities of sodium silicate liquids
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 1998-12)
The heat capacities of 29 glasses and supercooled liquids in the Na 2 O-SiO 2 , Na 2 O-Al 2 O 3 -SiO 2 , Na 2 O-(FeO)-Fe 2 O 3 -SiO 2 , and Na 2 O-TiO 2 -SiO 2 systems were measured in air from 328 to 998 K with a differential ...
Cretaceous/Tertiary Boundary: Zircon Can Take the Heat
(Springer Science and Business Media LLC, 1993)
Concordant paleomagnetic directions from the Tehuantepec Isthmus: Constraints on the Neogene evolution of the North American-Caribbean plate boundary
(Elsevier, 1994-09-15)
We report paleomagnetic data for Miocene igneous rocks of the southeastern Tehuantepec Isthmus region, Mexico. Thermal and alternating field demagnetization reveal predominantly normal polarity magnetization, interpreted ...
Earthquake source processes and subduction regime in the Santa Cruz Islands region
(Elsevier, 1990)
The source process of two large earthquakes that occurred in the Santa Cruz Islands subduction zone has been studied, one with a surface wave magnitude MS = 7.9 in 1966 and the other with MS = 7.7 in 1980. The seismic ...
A gravity model for the lithosphere in western Kenya and northeastern Tanzania
(Elsevier, 1992-10-15)
We present a new gravity model for the lithosphere beneath the Kenya Rift Valley, the Mozambique Belt, and the Tanzania Craton in western Kenya and northeastern Tanzania. The Kenya Rift lies within the eastern branch of ...
Composite magnetic anisotropy fabrics: experiments, numerical models and implications for the quantification of rock fabrics
(Elsevier, 1993-04-15)
Magnetic fabrics from rocks with multiple mineral-preferred orientations may have anisotropy ellipsoids whose shape and orientation arise from the addition of two or more component fabrics. Our numerical models and experiments ...
Age and petrogenesis of the Sarmiento ophiolite complex of southern Chile
(Elsevier, 1992)
Zircon fractions separated from fine-grained plagiogranites, interpreted to be cogenetic with the mafic rocks of the Sarmiento ophiolite complex in southern Chile, yield slightly to grossly discordant age patterns for which ...
Lacustrine organic geochemistry--an overview of indicators of organic matter sources and diagenesis in lake sediments
(Elsevier, 1993-09)
The factors affecting the amounts and types of organic matter in lacustrine sediments are summarized in this review, and synthesis, of published studies. Biota living in the lake and in its watershed are the sources of the ...