Nickel abundance data

When the data for vanadium, nickel, cobalt, copper, and iron in petroleum of the Western Interior Region (15) shown below are divided by the average crustal abundance of these elements, the relation, V>Ni>Co>Cu>Fe is... 

Nickel, palladium and platinum - The low natural abundance of the 61Ni isotope means that there is a paucity of data on NMR spectroscopy of this element, although much useful information can be derived from spectra of ligand nuclei (e.g. Zschunke et al., 1992 Oik et al., 1992). In the case of 105Pd, the large value of the quadrupole moment presents additional difficulties for direct spectroscopic measurements and, as with nickel, NMR studies have concentrated on the characterisation of ligand nuclei. An example here is the application of two-dimensional NMR to investigate the structure of a nucleic acid palladium complex (Bichenkova et al., 1992). 

Figure 13 Trace-element ratios in IDPs. Data from synehrotron X-ray fluoreseenee analyses are plotted on three element diagrams. Element ratios are normalized to bulk Cl abundances (element/Fe)sampie/(element/Fe)ci also denoted element/Fe/CL Cl eomposition lies at the point element/Fe/CI = 1 on eaeh plot. Averages, assuming data are normally distributed (open squares) and assuming the data are log normally distributed (open diamonds), are also shown. Plots (a)-(c) exhibit the behavior of some more refractory elements chromium, calcium, and titanium with respect to nickel, while (d) and (e) show the behavior of zine (relatively volatile) with respect to nickel (relatively refractory) and selenium (relatively volatile) (source Kehm et aL, 2002).

In contrast to the extensive data collected on trace-mineralized rocks between ore districts, less information is available on the arsenic contents of the ore deposits. Because iron sulfide minerals are typically gangue phases, they are commonly ignored in trace element studies of ore deposits, which tend to focus on ore minerals such as sphalerite and galena. Therefore, there have not been extensive analyses for arsenic in iron sulfides in many of the MVT ore districts or trace-mineralized areas. However, a few studies on trace element contents in iron sulfides from the Ozark region have been performed. Wu et al. (1996) analyzed 80 pyrite and marcasite samples from the Viburnum Trend of the Southeast Missouri Lead District and found arsenic in concentrations of 2 to 900 ppm. Bhati and Hagni (1980) also analyzed iron sulfide minerals from this area, but did not publish results for arsenic. Hagni (1993) described the relatively rare occurrence of nickel-arsenic-sulfide ores from the Magmont-West ore deposit of the Viburnum Trend. Leach et al. (1995) list arsenic as a trace constituent in ores from the Northern Arkansas and Southeast Missouri MVT ore districts, but without abundances specified. 

Figure 3 Observations of the star BD+75°325 (thick solid line) obtained by the Goddard high-resolution spectrometer on board the Hubble space telescope, showing numerous iron and nickel lines in various ionization stages. These data are compared with model atmosphere spectra. The thin solid line is the best fit model for an iron abundance of 4 x 10- and the dotted line is for solar abundances (4 X 10-5). A solar iron-to-nickel ratio has been assumed in both models. Reproduced with permission from Lanz T, Hubeny I and Heap SR (1997) Astrophysical Journal 485 843.

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