Geochemical implications

The phase relations, stoichiometry and structural chemistry of the metal borates have been extensively studied because of their geochemical implications and technological importance. Borates are known in which the structural unit is mononuclear (1 B atom), bi-, tri-, tetra- or penta-nuclear, or in which there are polydimensional networks including glasses. The main structural principles underlying the bonding in crystalline metal borates are as follows " ... 

Very few data on the chemical composition of electrum from epithermal base-metal vein-type deposits are available. However, it is evident that the Ag content varies widely (Fig. 1.71). The Ag content of electrum from the Osarizawa and Okuyama Cu deposits is low N g (Ag atomic%) = 8.6-17.7), while the Ag content of electrum from Pb-Zn-Mn deposits (Toyoha, Oe, Inakuraishi, and Imai-Ishizaki) is high NAg = 60-80). Motomura (1986) reported that the Ag content of electrum from these deposits is higher than that from epithermal Au-Ag vein-type deposits. The geochemical implication of the Ag content of electrum is discussed in section 1.4.4. 

The geochemical implications of selenium contents of sulfides for the physicochemical environment of epithermal ore deposition will be discussed in section 1.4.4. 

Mitra, A. (1994) Geochemical implications of rare earth element pattern in hydrothermal fluids from midocean ridges. Geochim. Cosmochim. Acta, 58, 5105-5113. 

Bada, J. L., Schroeder, R. A., Amino Acid Racemization Reactions and Their Geochemical Implications, Die Naturwessen-schaften, 1975, 62, 71-79. 

Sunda, W. G. and Huntsman, S. A. (1995). Cobalt and zinc interreplacement in marine phytoplankton biological and geochemical implications, Limnol. Ocea-nogr., 40, 1404—1417. 

Horita I, Cole D. R., and Wesolowski D. I (1993b). The activity-composition relationship of oxygen and hydrogen isotopes in aqueous salt solutions, II Vapor-liquid water equilibration of mixed salt solutions from 50 to 100°C and geochemical implications. Geochim. Cosmochim. Acta, 57 4703-4711. 

Watson E. B. (1976). Two-liquid partition coefficients Experimental data and geochemical implications. Contrib. Mineral Petrol, 56 119-134. 

Watson E.B. and Baker D.R. (1991) Chemical diffusion in magmas an overview of experimental results and geochemical implications. In Advances in Physical Geochemistry, 9 (ed. L. Perchuk and E Kushiro), pp. 120-151. 

Soil establishment either with or without the use of imported topsoil. Some of the geochemical implications of soil importation and/or in situ soil formation from spoil precursors are problematic (PIR AMID Consortium 2003) and... 

Suess, E. Interaction of organic compounds with calcium carbonate. I. Association phenomena and geochemical implications. Geochim. Cosmochim. Acta 34, 157-168 (1970). 

Rasilainen, K., Nurmi, P.A. and Bornhorst, T.J. (1993) Rock geochemical implications for gold exploration in the late Archean Hattu Schist belt, Ilomantsi, eastern Finland. Special Paper-Geological Survey of Finland, 17, 353-62. 

Calas, G. Petiau, J. (1983) Structure of oxide glasses Spectroscopic studies of local order and crystallochemistry. Geochemical implications. Bull. Mineral., 106,33-55. 

Ramberg, H. (1953). Relationships between heats of reaction among solids and properties of the constituent ions, and some geochemical implications. J. 

Bureau H. and Keppler H. (1999) Complete miscibility between silicate melts and hydrous fluids in the upper mantle experimental evidence and geochemical implications. Earth Planet. Sci. Lett. 165, 187-196. 

You C. F., Spivack A. J., Gieskes J. M., Martin J. B., and Davisson M. L. (1996) Boron contents and isotopic compositions in pore waters a new approach to determine temperature-induced artifacts geochemical implications. Mar. Geol. 129, 351-361. 

HodeU D. A. and Woodmff F. (1994) Variations in the strontium isotopic ratio of seawater during the Miocene stratigraphic and geochemical implications. Paleoceanography 9, 405—426. 

Geochemical Implications of the Phanerozoic Carbonate Record ACKNOWLEDGMENTS... 

Usdowski, E., 1994, Synthesis of dolomite and geochemical implications, in Dolomites, B. Purser, M. Tucker, and D. Zenger, eds., Blackwell Scientific Publications, Boston, pp.345-360. 

The presence of sulphur in oil shales has direct geochemical implications as well as direct economic significance. 

Mantoura, R. F. C. and Woodward E. M. S. (1983). Conservative behavior of riverine dissolved organic carbon in the Severn Estuary, chemical and geochemical implications. Geochim. Cosmochim. Acta 47, 1293-1309. 

---