Geochemical technique

Aeolian loess covers over 600,000 km in China. Conventional surface geochemical techniques have not been successfully... 

The very thick and electrically highly conductive weathering residuum in Australia limited the use of conventional geochemical techniques. Nevertheless, the Elura Zn-Pb-Ag massive sulfide body in New South Wales showed trace element, and conductance patterns in the A and B horizon soils over more than 100m of overburden similar to those found in Canada (Govett etal. 1984). 

The majority of the hydrocarbons detected by this geochemical technique have been proven to originate from bacteriological activity at depth. The heavier SGH compounds are robust and thus a wide variety of sample types may be used which is valuable in sampling in difficult Canadian environments. SGH is able to... 

The initial exploration and subsequent drilling in the Windsor area was sparked by the discovery of radon anomalies in the soil gas and well waters in the area (Quarch et al. 1981 Fig. 2). In addition, uranium and radium in well waters were weakly anomalous in the area. It is therefore not difficult to infer that these geochemical techniques are useful exploration tools for deposits of this type and that there are environmental Issues related to uranium occurrences in the Horton Group. 

The Moon and Mars have very different compositions and have had very different geologic histories. However, the geochemical techniques applied to both bodies are similar, and the results illustrate the power of chemical data in planetary exploration. Combinations of... 

Minor, E.C., Boon, J.J., Harvey, H.R., and Mannino, A. (2001) Estuarine organic matter composition as probed by direct temperature-resolved mass spectrometry and traditional geochemical techniques. Geochim. Cosmochim. Acta 65, 2819-2834. 

Andrews-Jones, D. A. (1968). The application of geochemical techniques to mineral exploration. Colorado School of Mines, Mineral Indus. Bull., 11, No 6. 

Richter B. C. and Kreitler C. W. (1993) Geochemical Techniques for Identifying Sources of Ground-water Salinization. CRC Press, Boca Raton, FL. 

The water mass tracers discussed above can be used to assess the sources of subsurface water masses and the mixture of waters from different sources. However, this information can be used only to assess the relative rates of renewal of these deep-water masses from the various source regions (e.g., LeGrand and Wunsch, 1995). There are several geochemical techniques that can be used to assess the rates of ocean circulation. 

Dahl J. E. P., Moldowan J. M., Teerman S. C., McCaffrey M. A., and Sundararaman P. (1994) Source rock quality determination from oil biomarkers I. A new geochemical technique. Am. Assoc. Petrol. Geol. Bull. 78(10), 1507-1526. 

The Application of Geochemical Techniques to the Investigation of Two Predynastic Sites in Egypt... 

The studies at two Predynastic sites in Egypt have demonstrated the value of geological and geochemical techniques to aid the archaeologist. 

Shipulin et al. (1973), in a major article, report the association of sulphur dioxide (SOi), hydrogen sulphide (H2S) and carbonyl sulphide (COS) with mineralisation. The profiles illustrated in that paper are persuasive however, the levels of H S reported are as high as 1% in the soil air at a depth of 1.5-2.0 m. The data must be regarded with some caution as this highly poisonous gas is inimical to virtually all forms of life, including plants, at these concentrations. Furthermore, it is at least one million times the concentration at which H2S is detectable as an odour by humans. This suggests that, if the reports are accurate, then vapour geochemical techniques would have been the oldest-established method of mineral exploration. 

Hickey, J.C., Klusman, R.W. and Voorhees, K.J., 1983. An integrative gas geochemical technique for surficial petroleum exploration. Amer. Assoc. Pet. Geol. Bull., 67 483. 

Sittig, M., 1980. Geophysical and Geochemical Techniques for Exploration of Hydrocarbons and Minerals. Noyes Data Corp., Newark, NJ. 

Notwithstanding the long gestation period of this volume, I am confident that it will nevertheless be not only a valuable guide for exploration geologists, but also the definitive source book on remotely-sensed exploration geochemical techniques for many years. 

This contribution provides an illustration of the application of biochemical and geochemical techniques in the context of an ongoing investigation into the inter-relationships between microbial activity and sediment diagenesis within saltmarsh and intertidal flat sediments near Warham on the north Norfolk coast, eastern England (Figure 7.1). This investigation. 

Allan, J.R. Wiggins, W.D. (1993) Dolomite Reservoirs. Geochemical Techniques for Evaluating Origin and Distribution. Am. Ass. Petrol. Geol. Continuing Education Course Note Series, 36, 129 pp. 

Identification of Sources of Ground-Water Salinization Using Geochemical Techniques... 

A widely applied discipline of chemometrics is pattern recognition, which involves the classification and identification of samples. Its purpose is to develop a semiquantitative model that can be applied to the identification of unknown sample patterns. To assure the best reliability, pattern recognition requires the applications of a minimum of two analytical methods. The ammonium-azonium tautomerism in /V, /V-d i a I ky I a minoazo dyes used as indicators requires three techniques UV-Vis, IR, and Raman spectroscopy.223 A study of the matrix composition concerning the ratio of the compounds is necessary as well. The application of pattern recognition analysis in geochemical techniques not only assures better reliability but is also quite useful in addressing real-world environmental problems.224... 

Geochemical techniques for contaminated sediments mainly are related to categories... 

Forstner U (2003) Geochemical techniques on contaminated sediments — river basin view. Environ Sci Pollut Res 10 58-68. 

The author thanks I mad Kordab for help during preparation of the sections on geochemical techniques, and Dr. Gunther... 

Significant advances have been made in our understanding of the dynamics of the global P cycle. Interestingly, many of these advancements are derived from the widespread application of P geochemical techniques developed for soils and sediments over the last several decades, but only recently adopted by oceanographers. These techniques have allowed us to further elucidate the dynamics of P transformations during... 

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