Mesozoic volcanic activities and deep processes in the Tan-Lu fault zone;

An assessment of the developmental stages of the Changbaishan volcanic activities and volcanic disasters;

Igneous rocks are well developed in Yangxin subsag,the forming and distribution of igneous rocks are mainly effected by fault movement,also the volcanic activities have some controlling effects on basin evolution,hydrocarbon generation,traps formation,h.

As a solely continental crust with compressive stress on all sides in global nine continental crusts,Chinese continental crust features widespread and the most active volcanic activity,hence it is main area of intraplate seismicity in the world.

There are five metallogenic types of Cu-polymetallic deposits related to volcanic activity in the Beishan area such as sub-volcanic porphyry,volcanogenic sedimentation and reconstruction,volcanogenic sedimentation,volcanic effusion and metamorphism,and hydrothermal fluid types,while the two former are the most primary industrial types.

indicate that the deposit origin has close relation with volcanic activity.

The Influence of Late Triassic volcanism on the development of Chang 7 high grade hydrocarbon source rock in Ordos Basin

The change of volcanic rocks from marine facies to continental facies and change of volcanism from strong to weak indicate that after the Permian the upper mantle materials had long been in a constrictive stage,and that the whole basin sank continuously to receive deposits,thus resulting in crustal thickening.

The authors have deeply realized the great significance of volcanism in the formation of gold deposits through many years of work in areas of volcanic rocks and arrangement and analysis of geological data of large and superlarge gold deposits at home and abroad.