Shale meteorites

Element Igneous rocks Clays and shales Meteorites Lunar rocks Oceans... 

The analysis of the insoluble organic component (lOM) in carbonaceous chondrites is based on the techniques developed for coal, oil shales and petroleum source rocks. In order to analytically access the organic material the mineral phase of the meteorite is dissolved using a mixture of HCl and HF (9), leaving behind an organic residue that can be either processed further or used directly for analysis. 

Vanadium macrocycles could serve as geochemical tracers that link geo- and biosystems. Vanadyl porphyrins have been identified both in Precambrian shale as well as in extraterrestrial meteorites. Although there are reports of the presence of either vanadium or porphyrin-like molecules in many types of recent and ancient sediments, the nature of vanadium bonding in all these samples is not known. Once this knowledge is acquired, an insight into the structure of these natural resources will facilitate their intelligent applications in energy conversion and environmental control. 

Fig. 2. (a) Raw lanthanide abundance data for Australian shales and Cl chondritic meteorites, showing the inherently higher concentrations of even-numbered elements (the Oddo—Harkins effect, due to the greater stability of even-numbered nuclides), (b) The lanthanide pattern resulting from normalising the Australian shale abundance data to the Cl chondritic values. This normalisation illustrates both the relative abundance and fractionation of the lanthanides compared to values typical of the primordial solar nebula. (Data are from table 4.) ... 

Rare earth element abundances [in ppm (wt)] in chondritic meteorites and average post-Archean shale (PAAS) used for normalising. 

The other major example of a relatively uniform lanthanide abundance pattern, in addition to that observed in chondritic meteorites, is found in most terrigenous sedimentary rocks, notably shales (table 23). This pattern (fig. 39) is characterised by light-lanthanide enrichment, a pronounced depletion in Eu (Eu/Eu = 0.66) and for the heavy lanthanides, abundances parallel to, and about ten times those of... 

Found in human liver, meteorites, oil shale and other sediments. Oil. Bpis 179.5 . 

Fig. 21.1. Concentrations of lanthanides and yttrium in a composite sample of 9 chondritic meteorites (Haskin et al., 1%8) are plotted against lanthanide atomic number in the lowest part of the figure. Relative lanthanide abundances for the solar atmosphere (Ross and Aller, 1976) and lanthanide concentrations for a composite of 40 North American shales (Haskin et al., 1968) are compared with the chondritic abundances in the middle and upper parts of the figure by plotting ratios of their lanthanide concentrations to those of the chondrites. Such comparison diagrams are used throughout this chapter.

---