Huangjinping Gold Deposit Geology And Geochemical Characteristics

The gold mineralization in the Dadu River valley belt is found in Southwest China one of the most important gold ore concentrated area.The mine is located in the western margin of the Yangtze platform, Kangdian axis north, Longmen mountain fold belt and har orogenic belt joint. The rock gold deposits have been found, constitutes the famous Kangding Dadu River Valley. "Dadu River gold metallogenic belt in the intersection of multi group and large-scale fault, since the Sinian period until now tectonic activity is still active. The tectonic movement of the magmatic eruption in the stage of the multistage and multi stage of the stage. Metallogenic conditions are very favorable, with the conditions of great ore.and ore prospecting potential is huge.Huangjinping gold deposit is located in the middle of the gold metallogenic belt of Dadu River Basin, A typical gold deposit in the basement. frequent magmatic activity, folds, faults are well developed. The deposit was found earlier(the year of 1983) and has been in the exploitation. Because of the climate, the geographical position and natural condition limited, in recent years, few experts and scholars have researched the deposit ore-forming geological background, metallogenic conditions, mineralization material source and geochemical characteristics. Therefore, I combined mineralogy, petrology, geochemistry and other related professional knowledge, based on the summary of the previous research achievements, The geological and geochemical characteristics of the deposit were systematically studied. discusses the metallogenic material source and metallogenic conditions.Huangjinping of ore-forming fluids of gold deposits in early late extrusion pull penetration fracture or fissure vein is typical quartz vein type gold deposit. Containing quartz vein in space and diabase dikes closely associated, and captured a large number of diabase or siliceous rocks, sometimes capture, sometimes parallel to each other. The main metallic minerals are pyrite, arsenopyrite, galena, sphalerite, containing a small amount of magnetite.Huangjinping deposit quartz diorite selected zircon U-Pb dating and get into rock age 723 Ma, The gold-bearing quartz ESR ages measured were 50.5 + 5.0Ma, 16.7 + 1.6Ma, 4.9 + 0.4Ma. The 16.7 + 1.6Ma bearing quartz vein is the main gold bearing quartz veins, quartz diorite and gold mineralization age very far.Combined field geological observation and indoor identification,The research of Huangjinping petrological characteristics, often trace element geochemistry, REE and trace element geochemistry, isotope geochemical characteristics shows that gold mineralization is formed in the orogenic environment. Quartz fluid inclusion indicates that the temperature of the ore deposit is of medium low temperature.The S isotopic analysis of pyrite derived from the mantle of S in ore-forming fluids.