Cu metallogeny at the platform period was mainly related to carbonate rock annd sandy conglomeratic clastic rock formation during transgression at the initial stable platform stage and clastic rock and volcanic formations in the.

However,earth sciences have been proceeding,the plate tectonics becomes insufficient tointerpret the complicated tectonic features in the earth crust,especially in the Early Pre-cambrian shields, platforms and cratons.

Research on the Spatial Form and Layout of Platform City Based on the Concept of Ecology;

Based on the features of deposition,several sedimentary facies are recognized in Changxing Formation,including deep carbonate ramp,open platform,trough,shelf(platform) margin,and a sedimentary model was established for the Changxing Formation.

Through analyzing the drilling core from the study area, it is considered that the growing environment of organic reef is deposit of carbonate platform in shallow water, where the organic reef is not in zonal distribution without the property of edge reef, it belongs to point reef or patch reef.

A weathering-denuding surface separates the lacustrine strata and a thick layer of the loess in the Tuoketuo mesa.