Exploration geochemical evidence for the genesis of the Jiaodong gold deposits in eastern China: A case study of the Haiyu gold deposit

Jiaodong is the largest gold province in China and has great potential for further prospecting. It has been confirmed that the enrichment of Au is always accompanied by pyritization in Jiaodong gold deposits, so the genesis of pyritization in gold deposits and the mechanism of Au enrichment associated with pyritization has always been an issue of discussion to the researchers, the relationship between pyritization and Au enrichment is still unclear. In order to solve this problem, this paper studied the occurrence state and transformation characteristics of S in the ore-bearing geological bodies and discussed the mechanism of Au enrichment. 84 samples were collected from the drill hole ZK3006 of the Haiyu gold deposit, the average sampling interval was 15m, and 7 specific elements/analytical indexes were measured (Total sulfur, Reduced sulfur, Na₂O,CaO, Sr, Ba, and Au), Burning-iodine quantity method was used to measure the content of Total sulfur, Combustion neutralization method was used to measure the content of Reduced sulfur Inductively coupled plasma-atomic emission spectrometry was used to measure the content of Na₂O and CaO, Wavelength dispersive X-Ray fluorescence spectrometry was used to measure the content of Sr and Ba, and Foamed plastic enrichment-inductively coupled plasma-mass spectrometry was used to measure the content of Au.