Abstract:

Tarim basin is a composite basin with multiple cycles. As the first set of sedimentary cover on the basement，Sinian，Cambrian and Ordivician systems are charaeterized by great thickness and abundant sedimentary types. Lithofacies paleogeographic environment stretches from seastrand to deep sea. Basing on the outcrop seetion，drilling data and the analysis of
carbon-oxygen isotope，trace element， geoehemistry and palaeontology，the feature and distribution of lithofacies paleogeograpic environment in Sinian，Cambrian and Ordivieian periods are analyzed in this paper.

Key words:

Paleogeographic envionment