关键词: 地质特征, 矿床成因, 找矿标志, 白石崖铁矿, 青海省

Abstract:

Baishiya iron deposit produces in the Early Carboniferous Dagangou group,its lithology includes: sandstone, conglomerates, limestone,shale, quartz sandstone or feldspathic sandstone and so on. Granitoids and Late Triassic volcano rocks of Hercynian and Indosinian widely distribute.The structure of mining in this area is complex,which has characteristics of multi -stage,inheritance and multiple mechanisms of tectonic.Fault strongly develop with large scale and space-time distribution characteristics of multi-phase and multi-directional.Wallrock alteration is developed,which mainly includes thermal metamorphism and contact metasomatic metamorphism,and the latter is more complex and more closely related to mineralization.17 magnetic anomalies have been found in Baishiya iron deposit,we suggest that magnetic anomaly is mainly caused by magnetite based on the inspection of magnetic anomalies.Through the magnetic anomaly geological work,we understand the mine geology and the ore deposit geological feature of the Baishiya iron deposit,we also sum up prospecting criteria,and finally delineate 47 iron orebodies and 11 lead-zinc-copper orebodies.Because of the sand cover is thick,most of the orebodies are blind orebodies.Baishiya iron deposit belongs to contact metasomatic skarn deposits.

Key words: Geological characteristics, Genesis, Prospecting indicators, Baishiya iron deposit, Qinghai Province