The Study Of The Main Rock And Typical Deposits In The North Of Duobaoshan District,Heilongjiang Provice

Duobaoshan is the large-scale porphyry copper(molybdenum) deposit in northeast China. With previous data collection and collation, field investigation sampling, experiments and analysis, the author studys the geological characteristics of intrusions and ore bodies, characteristics of geological ages, geochemical characteristics of rocks and tectonic evolution and metallization in the north of Duobaoshan District. The main conclusions are as follows:(1) The ages of intrusive rocks in ore cluster is yielded and classified. Except for Yubaoshan pyroxenite with the age of 526 Ma, later Sanfengshan gabbro with the age of 460 Ma, is oldest age in this area. The hercynian rocks including Zhuanghuhe Granite porphyry, East-Zhuanghuhe aplitic Granite, granite porphyry yielded the age from 299 to 320 Ma, As for Yanshanian rock including Western Huaduoshan Rock(167 Kilometre plagiogranite), Zhuanghuhe Quartz diorite, diorite, dacite, yielded the age at 170 Ma.(2) In Iron and Copper Sankuanggou deposit, empties, wittichite, bismuthinite, cobalt-pyrite, cassiterite, ferberite, scheelite, Hessite, ellurobismuthite, cobal, Zinc-enarg, bismuth, gold, electrum, kustelite such as metal mineral are Newly discovered. Comprehensive utilization of Useful metals as copper, iron, zinc, tungsten, cobalt, indium and bismuth is economic values possible. The iron mineralization belongs to the product of high temperature stage, copper mineralization is formed by hydrothermal metasomaticin medium temperature conditions. Zhuanghuhe Gold and antimony deposit is low temperature hydrothermal genetic types, the Numerical of δD, δ18O, δ30Si, δ34S are between-109.3 ‰ ~-130.9 ‰, 13.2 ‰~15.2 ‰,-0.9 ‰~0.1‰, 2.7‰~4.2‰, respectively. Fluid mainly comes from atmospheric precipitation,containing a small amount of magma water; quartz is in the range of hydrothermal quartz; Sulfur with magma source, at the same time reductive sulfur of Duobaoshan group formation to join in.(3) Magmatic activity of Yubaoshan pyroxenite and caledonian period Sanfengshan gabbro is associated with the collage of erguna- xingan massif the songliao- jiamusi massif, hercynian magmatic activity of Granite porphyry is influenced by the north subduction of Paleoasian Ocean to heilongjiang plates, yanshanian magmatic activity of Huaduoshan Rock and Zhuanghuhe Quartz diorite affected by the west subduction of the Pacific plate.(4) ~170Ma is an important period for Cu and Fe mineralization, 167 km oblique granite(East-Sangkuanggou, Huaduoshan rock mass east), there is an obvious abnormal Cu, key research objects can be used as the next step for Cu. ~300Ma, Granite porphyry and rhyolite is the most important Source rock for Au, Sb mineralization in the area, there is an obvious abnormal Au, Sb of Granite porphyry in Eaet-Zhuanghuhe 541 highland, the granite porphyry Au content is as high as 175×10-9, and find a natural gold, key research objects can be used as the next step for Au, sb.