Metallogenic Constrains And Regularities Of The Bishui Lead And Zinc Deposit In Daxing’anling, Heilongjiang Province

The Bishui lead and zinc deposit is located in the Huzhong Town of Daxing’anling, HeilongjiangProvince. Its tectonic position is the bordering area between the Emuer mountain uplift zone in theEerguna block and the depression belt (volcano rock belt) in the Daxing’anling area. The deposit islocated between the two NE trending fault zones, called Pangu-KamMa Lan River and the Huma Riverfracture zones respectively.The strata exposed in the area consist mainly of the Mesozoic Cretaceous Longjiang Group ofandesite, andesitic mass brecciated tuff, mass andesitic tuff lava, andesitic mass tuff; Guanghua groupof rhyolitic mass tuff, rhyolitic mass tuff lava, rhyolitic mass brecciated tuff, rhyolitic gravel-containingtuff lava, rhyolite, tuff, dacitic tuff, dacite, tuff sandstone and the Ganhe group of andesite, basalticandesite, basalt, andesite, trachyandensite, trachyandesitic tuff, trachyandesitic tuff breccia, andesitictuff-lava, andesitic brecciated tuff lava. The intrusive rock consists mainly of the early cretaceous ofgranite porphyry, which is located in the southwest corner of mining area as small stocks. The exposedvolcanic rocks of the area consists mainly of the Early cretaceous intermediate-acid and acid-basicvolcanic rocks. The Dykes are mainly granite porphory and diorite formed in the Late YanshanianOrogeny. The NW trending faults zones are the main ore-bearing faults and most of lead-zinc orebodies are hosted in these NW trending faults and related suborder fault zones.The Bishui deposit contains2mineralized alteration zone and17ore body, Ore body isapproximately parallel output pulse, like lode. Mineralization enrichment of high grade office of cysticor small lenticular. Local branch complex phenomenon of ore body. Ore bodies are hosted in the NorthWest trending tectonic fracture zone,It is dacite, rhyolitic gravel tuff lava, rhyolitic lava gravelcoagulation, rhyolite and andesite in Guanghua group. The useful mineral sphalerite, galena mainlyindustrial, Associated with magnetite, chalcopyrite, pyrite and other, Metal mineral such as pyrite,sphalerite, galena and chalcopyrite is the second. Wall rock alteration mineralization related to lowtemperature alteration features, mainly silicification, sericitization, carbonation, chloritization,In the late Jurassic to early Cretaceous of many times of volcano activity and granite intrusiveactivities caused multiperiodic hydrothermal activity, Provided metallogenic dynamic heat source, Thehydrothermal activity useful element is activated, migration, enrichment and hydrothermal fluid fillingthe useful elements together precipitated in the zone and fissure, Most of the structure of filling in theformation of ore bodies, Bishui Deposit in the inclusion temperature measuring, measuring theminimum temperature is122°, the highest temperature of245°, belong to middle low temperaturehydrothermal mineralization. In conclusion, we suggest the formation of the deposit is as the followings: the NW treading andEW trending faults provided channels for hydrothermal transportation and the related fractures zonesprovided favorable sites for hydrothermal replacement and filling. And under multiple stages oftectonic and magmatic activities and the combination of a series of favorable conditions, the Bishuilead-zinc deposit was finally formed in the NW trending fault zones.