Gold Deposit Characteristics And Metailogenic Conditions Of Xinmin-Dajilingku Region,Heilongjiang Province

Xinmin-Dajilingku work area is located Xunke County in Heihe City,the southwest Xinmin forest along the to Dajilingku forest, transportation is very convenient. Tectonic position is a Xing’anling-the Inner Mongolia geosyncline fold Xiaoxing’anling-Songnen Yichun-Yanshou geosynclinal fold system two tectonic units joint the Mu River to uplift with Tianlong Hill uplift, southwest Songnen interruption trap with phase. Stratigraphic development of the work area, the Upper Proterozoic, Paleozoic, Mesozoic, Cenozoic has outcrops. Intrusive rock types in the region is more complex, and in deep into the granite, granodiorite, porphyritic granite are feldspar granite and alkali granite-based.Various geological units of the workspace from the1970s until the early twenty-first century, to proceed with the exploration research, made a series of research results, but did not complete this deposit characteristics and mineralization conditions summarized.Heilongjiang Province, Xinmin-Dajilingku area the mineralization area lithostructural background, orebody the ore characteristics ores group structure, ore types and mineralization geological conditions, focusing on the depth Xinmin and dip in deposit types that the deposit formed in the area was significantly associated with a particular lithology, controlled by faults, simple and low levels of the composition of the ore minerals, ore fabric characteristics are shallow (low pressure) low-temperature hydrothermal origin.Summed Xinmin gold deposits (points) for the overall epithermal deposits, its mineralization is mainly affected by hydrothermal activity in the sedimentation process control, as well as the Mesozoic diorite magmatism; dip in region the gold mineralization is mainly associated with diorite, diorite porphyry intrusive activities, the deposit is a magmatic hydrothermal origin. Through research, proposed a new understanding of the region:The possible mineralization types for Au, As, Mo, Bi, the main mineral in Xinmin region for Au, Mo; The gold mineralization mainly surrounding rock mineralization mark is silicification, sericitization, pyritization; Ore-forming fluids underground hot brines and magmatic hydrothermal mixed characteristics; The overall the summed Xinmin Kundeqi gold deposits (points) for epithermal-type deposits, Mineralization is mainly affected by hydrothermal activity in the diagenesis process control, but also with the Mesozoic diorite and magmatic activity relationship; Dip in gold mineralization is mainly associated with diorite, diorite porphyry intrusive activities, the deposit is a magmatic hydrothermal origin. The cause is different between the two gold deposit; Gold mineralization has stratabound characteristics in this region, Gold mineralization in Kundeqi areas associated with Cretaceous Guanghua head of stone sandstone, siltstone, rhyolitic tuff lava, volcanic breccia and occur in; The Yanshanian alkali feldspar granite and acid volcanic activity, magmatic ore-controlling the late Indosinian monzogranite magma activities constitute the area gold mineralization in conditions; Xinmin Kundeqi gold mineralization in in the NW to the NNW trending fault control and pointed out the direction for prospecting. Proposed this area prospecting direction, in Xinmin, Kundeqi region should attach importance to siltstone interbedded with tuff the arkose looking epithermal deposits.