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Northwest Africa

Apatite exploration takes place in various regions of the World, and the most known are Kola Peninsula (Russia) and northwest Africa (Morocco). In both places, the apatite ores contain not only phosphorus as a main element but also many heavy metals, which are toxic for humans and animals. The given elements are F, As, Y, some rare earth species, Sr, Pb, Cd, Sn. The underground waters in these regions are enriched by F, Fi, Nb, some rare earth species with alkaline reaction that facilitates the migration of many ore elements. Some phosphorus containing ores are radioactive owing to the mixtures of uranium and thorium. [Pg.228]

Figure 42. Schematic sedimentary cross-section of a typical northwest Africa marginal sedimentary basin containing sepiolite-palygorskite bearing sediments (after the summary presented by Millot, 1964) K = Kaolinite ... Figure 42. Schematic sedimentary cross-section of a typical northwest Africa marginal sedimentary basin containing sepiolite-palygorskite bearing sediments (after the summary presented by Millot, 1964) K = Kaolinite ...
Smith, W. O., R. T. Barber, and S. A. Huntsman. 1977. Primary productivity off the coast of northwest Africa Excretion of dissolved organic matter and its heterotrophic uptake. Deep Sea Research 24 35-47. [Pg.23]

Romero, O.E., Dupont, L., Wyputta, U., Jahns, S., and Wefer, G (2003) Temporal variability of fluxes of eolian-transported freshwater diatoms, phytoliths, and pollen grains off Cape Blanc as reflection of land-atmosphere-ocean interface in northwest Africa. J. Geophys. Res. 108, 3153. [Pg.654]

Blasco, D., Estrada, M., and Jones, B. H. (1981). Short-time variability of phytoplankton poprdations in upweUing regions—The example of northwest Africa. In Coastal UpweUing. (Richards, F. A., ed.). American Geophysical Union, Washington, DC. pp. 339—348. [Pg.798]

Macisaac, J. J., Dugdale, R. C., and Slawyk, G. (1974). Nitrogen uptake in the northwest Africa upwelling area Results from the CINECA-CHARCOT II Cruise. Tethys 6, 69—76. [Pg.803]

Nelson, D. M., and Conway, H. L. (1979). Effects of the light regime on nutrient assimilation by phytoplankton in the Baja California and northwest Africa upweUing systems. J. Mar. Res. 37, 301-318. [Pg.804]

Smith, S. L., and Whitledge, T. E. (1977). Role of zooplankton in regeneration of nitrogen in a coastal upwelling system off northwest Africa. Deep Sea Res. 24, 49-56. [Pg.805]

Whitledge, T. E. (1978). Regeneration of nitrogen by zooplankton and fish in the northwest Africa and Peru upweUing ecosystems. In UpweUing Ecosystems. (Boje, R., and Tomczak, M., eds.). Springer, Berlin, pp. 90-101. [Pg.807]

Northwest Africa Oil Northwest Africa 176 Puente del Zacate QUE93148 Sahara 00182 Sombrerete Tucson... [Pg.86]

Liu M., Scott E. R. D., Keil K., Wasson J. T., Clayton R. N., Mayeda T. K., Eugster O., Crozaz G., and Floss C. (2001) Northwest Africa 176, a unique iron meteorite with siheate inclusions related to Bocaiuva. In Lunar Planet. Sci. XXXII, 2152. The Lunar and Planetary Institute, Houston (CD-ROM). [Pg.125]

Yamaguchi A., Clayton R. N., MayedaT. K., EbiharaM., (Dura Y., Miura Y. N., Haramura H., Misawa K., Kojima H., and Nagao K. (2002) A new source of basaltic meteorites inferred from Northwest Africa Oil. Science 2%, 334-336. [Pg.129]

Northwest Africa 011 Mahc Igneous - 1.80 Melt crystalhzation. [Pg.293]

Northwest Africa Oil (NWA 011) has briefly been described by Afanasiev et al. (2000) and more extensively by Yamaguchi et al. (2002), the source of most information presented here. NWA Oil is composed of relatively coarse, anhedral pigeonite and augite, and fine-grained, mostly interstitial plagioclase with a recrystallized texture, interpreted to indicate that it is a recrystallized breccia. Minor phases are silica, chromite, ilmenite, calcium phosphate, ferroan olivine, troilite, and baddeleyite. Pyroxenes make up... [Pg.316]

Nishiizumi K. and Caffee M. W. (2001a) Exposure histories of lunar meteorites Northwest Africa 032 and Dhofar 081. Lunar Planet. Sci. XXXII, 2101. Lunar and Planetary Institute, Houston (CD-ROM). [Pg.378]

M. A., Taylor L. A., and Wood J. A. (2002) The first known natural occurrence of calcium monoaluminate, in a calcium-aluminum-rich inclusion from the CH chondrite northwest Africa 470. Meteorit. Planet. Sci. 37, 1337-1344. [Pg.428]

Korotev R. L., Zeigler R. A., Jolliff B. L., and Haskin L. A. (2002b) Northwest Africa 773—an unusual rock from the lunar maria. Meteorit. Planet. Sci. 37, A81. [Pg.590]

Zhao M., Beveridge N. A. S., Shackleton N. J., Sarnthein M., and Eglinton G. (1995) Molecular stratigraphy of cores off northwest Africa sea surface temperature history over the last 80 ka. Paleoceanography 10, 661-675. [Pg.3279]


See other pages where Northwest Africa is mentioned: [Pg.226]    [Pg.21]    [Pg.240]    [Pg.351]    [Pg.62]    [Pg.465]    [Pg.780]    [Pg.780]    [Pg.792]    [Pg.800]    [Pg.112]    [Pg.292]    [Pg.316]    [Pg.318]    [Pg.360]    [Pg.360]    [Pg.369]    [Pg.369]    [Pg.369]    [Pg.369]    [Pg.369]    [Pg.589]    [Pg.3152]    [Pg.3247]    [Pg.3263]    [Pg.3263]    [Pg.3555]   
See also in sourсe #XX -- [ Pg.113 ]




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