REGIONAL GEOLOGICAL SURVEY OF HENAN PROVINCE

Henan province, spanning tectonically both the North and South China plates, belongs to the North China block and the North Qinling and South Qinling fold belts. The province is characterized by the occurrence of a relatively complete range of strata, abundant fossils, frequent magmatic activities and complex geological structures. In the crustal evolutionary history three stages can be recognized: the Archean Mesoproterozoic was the pre orogenic stage, the Neoproterozoic Triassic was mainly the orogenic stage and the Jurassic Cretaceous was the post orogenic stage.