The Metallogenic Conditions And Prospecting Direction Of Silver Polymetallic Ore In Sandaoliang Area Of Nenjiang County,Heilongjiang Province

The research area is located at about 100 km northeast of nenjiang county,and about 6.5km southeast of xinmin forest.Geotectonic location belongs to the marginal zone of tuen tuen and songnen massif in xiaoxing anling,xiaoxing anling-zhang guangcailing,a metal-metallogenic belt north west.In the study area,there is a group of the north division of the north division of the middle yuegu group in the middle yuan,and the group of the palaeozoic group.The intrusive rocks include the two long Jurassic rocks,granites,diorite,and early cretaceous porphyry.The lithology associated with metallogenic rocks is the rocky volcanic detrital rock,early Jurassic,and early cretaceous porphyry.Research area are very development,construct the direction north,west and north east to give priority to,secondly,nearly north-south and nearly east-west structure in north west to construct control spatial distribution of the ore bodies and mineralized bodies,ore controlling structure.There are three mineralized alteration zones in the area,the mineralized alteration is dominated by silicification,sericite,carbonate,chlorite and chloroplast,and the other is galena,sphalite and pyrite.Four industrial orebodies and more than 20 mineralized bodies were found in the alteration zone,and the genetic type of the deposit was deduced as the medium and low temperature hydrothermal type.Sandaoliangzi silver lead-zinc polymetallic mineral formation first by the north west-north east to the control of the fracture structure,secondly by stone village group containing ore formation,early Jurassic and early cretaceous granitic magma activity of control,they formed in ore-forming geological conditions;According to the results of soil anomaly,the better combination of silver lead and zinc sheath can be used as the direct prospecting mark.Granitic magmatic rocks in the polarization rate at 1.0 to 2.1%,the resistivity in 1400-1400 ? · m low polarizability,high resistivity anomaly,can be used as a main search for deep concealed ore geophysical signs.According to the orebody occurrence position,geological structure,lithology,the study of wall rock alteration characteristics,determines the prospecting marks,pointed out the prospecting direction of the,in the study area were delineated the three metallogenic forecasting area,respectively,three Liang Na silver polymetallic metallogenic forecasting area,three north liang silver zinc polymetallic metallogenic prediction area,walnut hill lead-zinc polymetallic metallogenic prediction area,pointed out the direction for further ore-prospecting work.