Abstract: Microfacies analysis constitutes the basis for studying carbonate sedimentary environments. The scholarly tendency to categorize microfacies into distinct types, however, risks ignoring the continuity and congruity between different environments. To address this predicament, we studied the carbonate strata from Langshan Formation in central Tibet. We collected polarized photomicrographs of 559 thin sections from three stratigraphic sections of the Langshan Formation, and described the location, stratigraphic age, lithology and petrography of these thin sections. The results show the lithology of the Langshan Formation including limestone and dolostone, where the wackestone, mudstone and floatstone are the dominants in the limestone. This photomicrograph dataset can be used to support basic geological research, oil exploration, carbonate facies modelling, teaching and general science popularization.
Keywords: Lhasa terrane; mid-Cretaceous; Langshan Formation; polarized photomicrograph