devices additives are used for an appropriate drilling. These drilling fluids pose the
risk of sample contamination. This also accounts for the above-mentioned oil
sampling from wells, that are also drilled with the support of drilling fluids.
An alternative sampling is related to outcrops, where stratigraphic systems are
directly available (see Fig. 2.1). However, in this case the influence of weathering
and oxidation processes need to be considered. Noteworthy, each sampling of
sedimentary systems needs a thorough description of the lithology. Criteria of sub
sampling sedimentary archives are either different lithological layer or regular
intervals in case of homogeneous systems.
Fig. 2.1 An example of an outcrop area (a) and sampling work at an outcrop (b)
2.1 Sampling Type and Techniques
7
risk of sample contamination. This also accounts for the above-mentioned oil
sampling from wells, that are also drilled with the support of drilling fluids.
An alternative sampling is related to outcrops, where stratigraphic systems are
directly available (see Fig. 2.1). However, in this case the influence of weathering
and oxidation processes need to be considered. Noteworthy, each sampling of
sedimentary systems needs a thorough description of the lithology. Criteria of sub
sampling sedimentary archives are either different lithological layer or regular
intervals in case of homogeneous systems.
Fig. 2.1 An example of an outcrop area (a) and sampling work at an outcrop (b)
2.1 Sampling Type and Techniques
7