16. Eocene–Oligocene Subtropical Planktonic Foraminifers at Site 841
Late Paleozoic Foraminifers and Carbonate Petrography in ...
Transcript of Late Paleozoic Foraminifers and Carbonate Petrography in ...
Late Paleozoic Foraminifers and Carbonate Petrography in Central Lao PDR: A Preliminary report
Thasinee Charoentitirat*, Sarawute Chantraprasert and Patcharaporn Champasa
*Department of Geology, Faculty of Science, Chulalongkorn University, Bangkok 10330 THAILAND
Lao-Thai Conference @Vientiane, Lao PDR 17-18 January 2013
Abstr. p.72
- Fossil Foraminifers in the area
will provide biostratigraphic
control for structural
interpretation.
- Petrography of the carbonate
samples will enable
classification of sedimentary
facies and interpretation of
palaeo-depositional
environment.
Rationale
C-P1 km
C1 bp
Sample locations
Fossils
Carbonate Petrology Structure interpretation
Khammouan Formation
“Khammouan Limestone” forms the core of a NW-SE trending anticlinal structure flanked by non-marine Mesozoic strata
Mississippian Foraminifers
Pennsylvanian Fusulinids
Early Permian fusulinids
KM1
KM45
KM30
KM46 Ooid shoal
KM35
KM11 KM24
Carbonates were accumulated on a
huge carbonate platform of shallow-
marine conditions with different sub-
environments
: very shallow marine in high-energy
settings or ooid shoals
: open marine and platform interior environment.
- More information data on biochronological significance:
Mississippian, Pennsylvanian and Early Permian.
- Orientation data and biochronological data obtained in this study
led to the interpretation of additional reverse faults.
- Depositional environment: huge carbonate platform of shallow-marine conditions with different sub-environments.
Conclusions