Combining all kinds of data , we identified and divided every sequence unit by using theory of sedimentology and sequence stratigraphy , and established high precision sequence formation frame; then concluded plane distribution regular of the Fang 4 area on the basis of the research of sedimentary microfacies of Cretaceous and Paleogene, so we can evaluate beneficial sand body.

First, the contents of some major and trace elements in the bulk samples of Baishantou section,a typical outcrop neighbouring the Cretaceous-Paleogene boundary, were determined with Inductively Coupled Plasma-Atomic Emission Sp.

Ocean Environment Changes during Cretaceous/Paleogene Boundary at Gamba Basin, in Southern Tibet;