The strata strike NE,and its rock association are consisted of pyroclastic sedimentary rock,micrite and pyroclastic rocks,and containts brachiopoda,coral,bryozoan.
The total sedimentation was that rivers were branching and migrating frequently,and the sedimentary structures and fossil of ichnite were growing generally.
Ichnofabric analysis displays a rising significance on accurate environmental interpretation of sedimentary units in oil-bearing basin and precise recognition of depositional disconuities.
Based on the petrographical analysis of key wells,log data is used to investigate sedimentary characters of early palaeozoic in Sulige area,Erdos basin.
The REE patterns for bitumen is similar to those for supracrustal sedimentary rocks in areas with no basement faults but stabilized structural settings.
By using sulpho acid to dissociate samples, using spectrophotometric method to determine micro-chrome in drainage sedimentary is very easy and simple with low cost.
Then use antitone structural analysis method to recognize and reconstruct the primary tectonic structure and sedimentary feature of a basin in certain geological history.
These basins were generally filled with upward fining and deepening sedimentary sequence that comprises nonmarine to marine, shallow marine to deep marine depositional systems.
The sedimentary facies in Heshilafu is an alluvial fan - fan delta -lake systetn, and it can be further devided into several parfacies including microfacies.
The lithologies are dominated by alternating sandstones, shales and limestone, and the sedimentary environment based on shoreland tidal flat with swamp developed in the lower.
We searched other major valleys sporting outcrops of the same volcanically derived sedimentary rocks, which are exposed across thousands of square kilometers of mountainous terrain.
After rapid overall swelling , in the late stage occurred alluvial fan-braided river facies sedimentary cycles made of red polyterrigenous molasse deposit s with multi-source supplying.
Dissolution is controlled by both sedimentation and tectonization, and the converted degree on reservoirs is closely related to sedimentary facies and the distance from unconformity interfaces.