Contacts :
Technical manager : Marielle Hatton
Scientific correspondent : Fatima Laggoun
Brand and model :
LEICA DMR XP
Principle :
- Extraction and concentration of organic matter (OM) from soils, sediments and rocks
- by acid attacks (HCl and HF) and mounting of slides
- by densimetry (dense liquors) and inclusion of densimetric concentrates in resin followed by polishing of inclusions
- Analysis of palynofacies by photonic microscopy in natural transmitted light and UV
- Measurement of the reflectivity of vitrinite (on a hundred particles) by photonic microscopy in monochromatic natural reflected light (at 546 nm) and calibration against a standard
Objectives :
- Palynofacies: Semi-quantification of organic constituents of soils and sediments and identification of their botanical precursors
- Reflecting power of vitrinite: Characterization of the state of thermal evolution (rank) of the OM of soils, sediments and rocks and its petrogenic potential.
Pre-treatments :
Grinding if necessary, acid attacks, preparation of slides, concentration of OM by dense liquor, inclusion in resin
Results obtained :
Relative and semi-absolute quantities of organic constituents in the treated samples, reflectograms