Mineral potential modelling for gold mineralization within
 the Mesozoic depressions in the Central Aldan ore-placer region
 (on the example of the Upper Yakokut ore field)

Abstract

In this work, we described the patterns of formation
 and distribution of gold occurrences of various morphological
 types in the terrigenous sequence of the Upper
 Yakokutsk graben depression. We characterized the
 zones of ore-bearing dislocations with increased permeability
 within the ore region confined by regional faults.
 Such zones with a frame-block structure forming the
 nodes of conjugation of regional structures are favourable
 for their repeated resumption and correspond to the
 most prospective areas. The study of native gold from
 ores and surrounding metasomatites showed a large
 variation in its fineness, based on which we can assume
 that the gold ore zones were repeatedly renewed from
 the Middle Jurassic to the Early Cretaceous. A correlation
 was noted for several subordinate structures: zones
 of ore-bearing dislocations – structures of prospective
 areas – ore bodies of various morphologies.
 The terrigenous sequence is considered not only as a
 structure-forming unit but also as a component involved
 in hydrothermal ore formation due to the presence of
 carbonaceous siltstones layers.
 The proposed model of the gold ore region makes it
 possible to allocate the most promising prospective areas.
 The presence of similar graben depressions developed
 in prospective ore regions within the Central Aldan
 ore district indicates the likelihood of identifying
 common patterns of endogenic mineralization within
 them.