Ore-Controlling Factors and Genetic Significances of Manaoke Gold Deposit in Northwest of Sichuan Province
Received date: 2012-07-27
Revised date: 2012-08-27
Online published: 2012-10-10
As a typical representative of the finedisseminated gold deposits related with the tectonic alteration zone, Manaoke Gold Deposit is located in the northwestern Sichuan province. Recently, research has found that the deposit of this type is close in space with the tectonicmagmatic activities and the deep fluid. With a systematical study of geological characteristics of the deposits, the orecontrolling factors and the mineralization are identified on the basis of the study of the geological feature of deposit, the metallogenic regularities of the deposit are summarized, and prospecting orientation is outlined. Manaoke Gold Deposit is primarily controlled by the structure. The location of ore bodies is controlled by the multistage fractures, cracks and joints of different directions in the Manaoke brittleductile shear zone, and the tectonic alteration zone is the mainly favorable part for bonanza ores. Although the occurrence of the ore bodies is mainly NW, the compound positions of the NNE, NW and NS structures are the favorable position to find the rich and large ore bodies. Outside the abundance and the occurrence state of the metallogenic elements, stratums combination of different physicochemical properties should assume more responsibility for this. In profile, the lithology association is rhythm of sandstone and slate, which help to form superimposed relationship and ordered arrangement of competent (permeable barrier) and incompetent (impermeable barrier). Almost all of the gold ore bodies occur in transfer sites between competent and incompetent, that is the contact belt of sandstone and slate. The Manaoke Gold Deposit shows obvious difference with the traditional "Carlintype Au deposit". The tectonicmagmatic activities play an important role in controlling ore bodies, as well as obvious signs of deep source fluid involved in metallogenesis. The Manaoke Gold Deposit belongs to a large scale mediumlow temperature hydrothermal gold deposit of polygenetic compound characteristics.
Key words： Ore-controlling factors; Genetic significances; Gold deposit; Manaoke.
Zhang Guojian , Zhang Chengjiang , Dai Wangui , Zhang Xinghua , Song Hao . Ore-Controlling Factors and Genetic Significances of Manaoke Gold Deposit in Northwest of Sichuan Province[J]. Advances in Earth Science, 2012 , 27(10) : 1068 -1073 . DOI: 10.11867/j.issn.1001-8166.2012.10.1068
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