|
Qiandong Jinping eight grams gold deposits are highly enriched in gold , arsenopyrite and pyrite ore body and country rocks widely with other gold mines in the district . In this paper, the causes of mineralogy and ore mineralogy theories and methods , using modern testing techniques and tools for guidance , on the basis of the previous analysis of the geological background of the deposit , mineralization conditions , deposit geochemical those the mine output arsenopyrite and pyrite standard Type Characteristics , to fill the gaps in research , the the genesis important information obtained from another angle . Orebody auriferous arsenopyrite small particle size , degree of crystallinity , unit cell parameters close to the theoretical value of thermoelectric properties for the N - type electric field and mean -195 . ( ? ) V ° C -1 significantly lower at the values ??of surrounding rock , the chemical composition of the S / As is greater than 1, the Fe / ( As S ) is less than 0.5 , the probe under the particles more broken , fractured , and appear to have filled associated mineral galena . Orebody bearing pyrite formed at the the orebody edge and the upper , fine-grained, poorly crystalline cell parameters are consistent with theoretical values ??of thermoelectric properties of P-type electric field and thermoelectric coefficient is positive, the formation temperature at 234.0 ℃ ~ 311.3 ℃ , the chemical composition of S / Fe is greater than 1 , under the needle for the sulfur-rich pyrite particles more broken , fractured . REE and trace element results show that , arsenopyrite , pyrite in the ore body REE significantly lower than the surrounding rock in the REE , Eu show strong negative anomalies ; chalcophile elements and LREE, enriched in the ore-forming fluid loss in HFSE the mineralization fluid as a weak reducing rich - Cl type system ; Y / Ho, Zr / Hf, Nb / Ta and Co / Ni ratios , inferred the eight grams gold mine is a magmatic hydrothermal deposit - temperature .
|