A PRELIMINARY APPROACH TO THE GEOTECTONIC EVOLUTION HISTORY AND MINERLIZATION IN VICTORIA,AUSTRALIA

A PRELIMINARY APPROACH TO THE GEOTECTONIC EVOLUTION HISTORY AND MINERLIZATION IN

VICTORIA,AUSTRALIA

DAI Ta-gen;CHEN Gua-da

【期刊名称】《大地构造与成矿学（英文版）》 【年(卷),期】2001(025)001

【摘要】According to the available data and field research, based on the diwatheory, the authors have studied the geotectonic evolution history and the associated minerlization in the Victoria area. It has been shown that this area is in fact a part of the Lachlan diwa region. The Victoria area can be divided into geodome fault-fold zone and subsidence zone. The former can be subdivided into three zones, from west to east, which are western uplift zone, central depression zone and eastern uplift zone. The evolution history of the Victoria area can be divided into four stages-Pregeosyncline, geosyncline, plateform and diwa. Each stage has distinct sedimentary, magmatic and structural features. Of the four stages, diwa stage is the most important for minerlization. Diwa stage started in the Devonian. During the development of diwa, a number of granites, which are characterized by high SiO2 and Na2O+K2O, were formed. The granites were abundance with mineralforming material. On the other hand, diwa geotectonism reformed and enriched the geosynclinal or platform ore deposits. Therefore, most of the ore