METALLOTECTONIC DYNAMICS ENVIRONMENT OF ZEOLITE ORE DEPOSITS AROUND THE SONGLIAO BASIN
There are abound zeolite resources and various types of zeolite ore deposits around the Songliao Basin which are the important constitutions of zeolite metallogenic belt around the Pacific Ocean in east China. In the study area, the Mesozoic volcanic rocks and zeolite ore belts are controlled by the NE-NNE trending deep fracture zones. Zeolite ore fields and major ore deposits are located in cross compounding regions of deep fracture zones of different trends. The alkine and K rich volcanic rocks, which are source rocks of zeolite ores, formed in middle late Yanshanian stage, with tectonic dynamic mechanism of compression and left lateral shearing. Tectonic reversion occurred in Himalayan stage, with tectonic dynamic mechanism of extension and right lateral shearing and accompaning magmatic activities. It led to geothermal anomaly occurring, temperature of subsurface fluid rising and zeolite mineralizing. The metallogenetic epoch of zeolite deposits hosted in the Mesozoic volcanic rocks in the study area is the Cenozoic era, with ages from 64 50 to 5 50 Ma.