The Relationship Between Tectonic Classifications And Distribution Of Gold Deposits In North Asia

This paper makes a detailed review over the literatures of tectonic classifications and the metallogenic analysis for gold deposits in North Asia. Combining with the new geological data, this area was subdivided into three tectonic units, being consistent with Wang and Zhang (2002). Geological and tectonic maps were digitized based on an ArcView platform. Information of the deposits are mainly from the Development and Research Center of China Geological Survey and Nokleberg et al. (2004). The comprehensive analysis may suggest that most of the gold deposits distribute within the fold belts which were subject to several tectonic events during their geological history. The most significant relationships are summerized as follows:1. The North Asia area may be divided into three first-rank tectonic units: the Siberia continental platform, the Verkhoyansk-Kolyma orogenic belt and the Centra-Asian orogenic belt. The second-rank tectonic units, including nuclei, fold belts and blocks, are subdivided in this study.2. Based on the analysis of the gold deposits on Siberia craton, Archean deposits are located on the Aldan nucleus, Proterozoic deposits on Baikal fold belt and Yeneisy fold belt. The ages of the deposits of the Stanovoy fold belt are consistent with the three stages of the tectonic evolution: Archaean collision of proto-Stanovoy terranes and consolidation of the basement, Proterozoic collision between Stanovoy terranes and the Siberian craton, Phanerozoic accretion of the Mongolo-Okhotian fold belt to Siberian craton.3. The Verkhoyansk tectonic evolution includes two main stages: (1)the deformation during Paleozoic and, (2)the collision with Omolon block during late Jurassic-early Cretaceous. These stages are consistent with the gold...