Stratigraphy analysis

Curiale J. A., Cole R. D., and Witmer R. J. (1992) Application of organic geochemistry to sequence stratigraphy analysis Four Corners Platform area, New Mexico, USA. Org. Geochem. 19(1-3), 53-75. 

A molar element ratio (MER) analysis was undertaken to gain insight into the diversity and compositional controls on these rocks, and to identify stratigraphy hosting alteration zones and potential mineral deposits. 

To determine the age of these objects, archaeologists had to develop new strategies. Although pottery phases and stratigraphy (the analysis of the origin, distribution, and succession of layers or strata of earth) can be used to date objects found on land, neither technique works reliably for objects found in the sea, where water may distort the shape of a jar or may carry away rocks and silt from the scene of the wreck. Instead, archaeologists use anchors (and sometimes ship nails) to determine the age of a shipwreck. Like pottery, anchors were produced in different sizes and shapes and made of different kinds of materials (such as stone or iron) that conform to histori-... 

These techniques are normally adequate to answer most of the questions encountered on archaeological sites however, complex stratigraphy and unusual soil conditions can present a more difficult problem. In this chapter, we explore what additional information might be provided by a more comprehensive elemental analysis. Instrumental neutron activation analysis (INAA) was chosen because it provides concentration data for both the major elements usually obtained by conventional techniques and the trace elements used in many provenance studies. 

The dominance of Komagatake ejecta at Yagi supports the concept of single source variability. The behavior of major elements and REE in the Yagi soil profiles is compatible (29). However, this will remain conjectural until analysis of dated stratigraphies at or close to both Komagatake and Essan have been completed. 

Fig. 1. Voelkersen field location (arrow on insert map of Germany, upper right). Upper Paleozoic stratigraphy (SR, source rock), schematic top Dethlingen sandstone structure map, and schematic cross sections (datum is top Rotliegend), Voelkersen field, N Germany (thick dashed line represents concession boundary). Note that well N2 was recently switched to OHW production but gas analysis reported here are for gas in the Dethlingen sandstone.

Ochsenbein, U., W. Davison, J. Hilton E. Y. Haworth, 1983. The geochemical record of major cations and trace metals in a productive lake — analysis of thinly sliced sediment samples characterised by diatom stratigraphy. Arch. Hydrobiol. 98 463-488. 

Sieck, H.C., and Self, G.W. 1977. Analysis of high resolution seismic data. In Seismic Stratigraphy— Application to Hydrocarbon Exploration, Payton, C.E., ed., AAPG Mem 26, pp. 353-385. 

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