The key to reconstruct marine-continental features and basin-range patterns in geohistory as objectively as possible is to find, within a given time constraint, the "disappeared" tectonopalaeogeographic units and the later "appeared.

The characteristics of the carboniferous structure in QilianAlashan area are studied in the paper, and the area is divided into three secondary tectonic units from south to north:continental marginal active belt, QilianAlashan semicraton and Zongwulong aulacogen.

The tectonic units of the Jiaolai Basin are recognigzed based on the results of gravity inversion and the geological characteristics.

Point to this phenomenon,the paper proceeded with structural element division,took the advantage of plate tectonic analytical method to outline the tectonic history, thus held an opinion that the faulted basin is main coal hosting structural form in the region.

The classification of structural element and preliminary evaluation of Qiangtang basin are performed based on its mag-netic,gravitational,electromagnetic sounding,surface geologic survey and a few seismic information as well as related experimental analysis data.

New Division of the Main Tectonic Units of the Qinling Orogenic Belt,Central China

This study deals with complexity, frequency spectrum and velocity model of the crust mantle transitional zone in different tectonic units along the northeast margin of Qinghai Xizang plateau, based on P M P waveform data from two deep seismic sounding profiles passing through the area.

can be divided into four tectonic units (B1, B2, B3, B4 ).