Research Of Prospecting Direction In The Daxin’ganling Songheyi Area, Heilongjiang Province

The study area is located in the northern section eastern slope of Great Xing’anRange, northern Heilongjiang Province. The study area is belong to the northern section ofvolcanic rock belt, Great Xing’an Range metallogenic Provinces (Ⅱ class), DeerbuganLate Paleozoic and Mesozoic Au, Ag, Cu, Mo, Pb and Zn metallogenic belt (Ⅲ1),Ganbuhe-Houleshan Pb, Zn, Cu, Au and Ag metallogenic belt. The area is favorablepolymetallic metallogenic belt area in the Great Xing’an Range, and low research ondegree of geology and mineral resources in this area. At present, the known ore deposits(mineral occurrence) is only the Songheyi Dongshan Mo, Pb, Fe and Zn polymetallicoccurrence.There are large area of nonferrous metals geochemical anomalies have beendiscovered in previous work, however verification is relatively lacked, and Mo, Pb and Znmineralized bodied are discovered in the verified area. The metallogenic conditions havesome limitations within the area, because of less comprehensive study of mineralizedoccurrence. With the future work goes on, we can forecast there is good prospects formineral development work in the region. Based on data about regional fundamentalgeology, geophysical and geochemical exploration, structure geology and prospectinggeology, combining comprehensive analysis of collecting information, we carried outfurther comprehensive geological research. The main advance achievements from thisstudy area are as followings.1. Magma activities in this area happened in the early Cretaceous during LateYanshanian supplied hydrothermal solutions for metallogenesis. The Early Cretaceousporphyries were well developed in the known Songheyidongshan and Xiongguanlinchangore spots. Even though the lack of evidences to indicate the forming for Porphyriticminerals, the porphyries still have definite control action and undoubtedly provided hydrothermal solution of mineralization. Mineralization happened in the Guanghuagroup,the early Cretaceous, proved that there is at least once ore-forming flulid activitybefore formation of volcanic rocks.2. The Songheyidongshan ore occurrence and Xiongguanlinchang mineralized spotboth are located in the loop tectonic intersection postion of this area. The linear structure isa reflection of the fracture. And ring structures should be a reflection of the deepconcealed rock mass. And ring structures are obviously controlled by the linear structures.I infer that remote sensing ring structure is likely to be subvolcanic rocks which arehomologous with volcanic rock. On this basis, I believe that the workspace metallogenictime should be in late Yanshanian. Main metallogenic events should be developed in theEarly Cretaceous Epoch.3. The main regional sturctures are NE-trending and NW-trending, and regional ringtype structure is developed along NE-trending. The join position between NE-andNW-trending faults, and ring type structure is beneficial position for migration andoccurrence, and is the best position for mineralization. The Songheyi Dongshanoccurrence is occurred in this position. The geochemical abnormal is presented as NW-and NE-trending. The NE-trending fault is developed between NO. Ⅰ and Ⅱmineraloccurrence, and controlled distribution of geochemical abnormal and regional mineraloccurrence.4. The wall rock alteration type were widespread in the study area, such assilicification, pyritization and greisenization, which is closely related to mineralization ofMo, Fe, Pb and Zn.