Analysis On Metallogenic Geological Condition & Potential Of Deposits In Daan Of Fujian

The east and south area of Fujian , as one of the most important metallogenic belts of China, possesses of outstanding metallogenic geological condition of gold and silver deposits since polycyclic geotectonic movement results in extensive distribution of petrographic series of gold and silver, frequent magmatic activity, and intense tectonic activity. Distinctive characteristics of gold and silver abnormity within in the area appear as extraordinarily metallogenic foreground of gold and silver due to concentration in spatial distribution. Numerous gold and silver deposits on large, medium and small scale have currently been discovered within the belt. This paper is to summarize and compare the geological characteristics of typical gold and silver deposits (ore occurrence) in the area, furthermore, to analyze the geological condition and discuss metallogenic pattern and prospecting potential as well.The ore area of Aaan Fujian is loeated in the contact zone of Zhenghe-Dapu geofraeture and adjiacents Shangguanding black mica granitebody.It is affeeted by the regional struetures and rock mass. So,it has the Excellent ore-forming condition and the signifieanee of prospecting gold polymetallic ore can beeoneluded. This article is embarked from the basie geology researeh and colleeting related datas on the basis of the previous researehers'conelusion,analyzing the maeroseopical proeess of the Tectonic and mineration in the distriet, and the relation between the ore and struetures , magma, stratum . On these basis,coneluding some results about ore formation. Draw a conelusion that the ore was deposited in the cranny of rock. and the ore-forming fluids were predominantly derived from the volcano function ,formed the gold polymetallic ore.On the above foundation,combining mineration construetion with strueture-mineral reformation. The author summed up the main out comes which are showed in the following orders:1.Via analyszs of main ore-controlling elements,coneluding the deposit is obviously conrolled by the layer petrography and tectonic evolution,tectonic evolution is espeeially importent to the dlstribution of ores.2.The ore-forming criteria for the prognoses of metallogenesis are proposed on the basis of the comprehensive studies. Aeeording to the criteria,the favourable targets for ore-forming are enelosed and the prospeets of them areanalyzed.