L. 1984 Composition of the upper mantle: geophysical tests of two petrologic models. Geophys. Res. Lett. 11, 237-240.Bass JD, Anderson DL (1984) Composition of the upper mantle: Geophysical tests of two petrological models. Geophys. Res. Lett. 11:237–240...
The considered investigation is concerned with a reexamination of the question of the distribution of siderophile elements in the earth's upper mantle, taking into account a more unified data base which is now available. A comprehensive suite of ultramafic inclusions was collected as part of the ...
The mantle is composed of the Upper and Lower mantle. The upper mantle consists of the lithospheric mantle, the asthenosphere, mesospheric mantle and transition zone. The lower mantle consists of a portion of the mesospheric mantle. What is in the mantle of the Earth? The mantle is the larg...
Refined estimates of primitive upper-mantle (PUM) composition are derived here from the major-element and rare-earth-element (REE) contents of mantle lherzolites, using the approaches pioneered by Loubet et al. (1975) and Jagoutz et al. (1979). Because the PUM composition of Jagoutz et al...
Unusual upper mantle beneath Guaniamo, Guyana shield, Venezuela: Evidence from diamond inclusions The geochemistry of mineral inclusions in diamond is an important source of information about the composition of the continental lithospheric mantle at dep... NV Sobolev,ES Yefimova,DMD Channer,... - ...
Table 1 Physical parameters of all of the lithosphere types used in this study, together with those of the Primitive Upper Mantle (PUM). Full size table Here we explore the idea that, whenever the lithosphere is incipiently forced to sink into the asthenosphere, it can become positively or ...
of the mantle source beneath the Azores. For example, there is debate over whether or not the melting anomaly beneath the Azores is deep-seated or restricted to the upper mantle [1]. The enriched trace element and isotopic signatures have been used to support the idea that a recycled ...
A new seismic model of the Moon: Implications for structure, thermal evolution and formation of the Moon 2003, Earth and Planetary Science Letters Citation Excerpt : We now focus on the model interpretation in the upper mantle of the Moon, i.e. the first 500 km (Fig. 4A). We compare fi...
High olivine contents of up to 87% are implied by seismic models of the western U.S. and eastern Pacific regions. In contrast, we infer less than 35% olivine under the central Pacific. Strong variations of olivine content and upper mantle lithologies near the 410 km discontinuity are ...
increased amount of time now given to composition enables the high school to cover a wider field than formerly; and third, because such topics can be studied with profit by pupils in the upper years of the high school course.8. It is not intended that the text shall be recited. Its purp...