Re-Os and ~(40)Ar/~(39) Ar dating of the Shujiadian copper deposit in Tongling,China:Implications for regional metallogenesis
2012; Science Press; Linguagem: Inglês
ISSN
2095-8927
Autores Tópico(s)Geological and Geochemical Analysis
ResumoThe Shujiadian copper deposit,located between the Tongling fault uplift and the Fanchang fault basin in the Middle and Lower Yangtze River,is a newly discovered porphyry copper deposit.To determine the mineralization age and the geological characteristics of Shujiadian copper deposit are very important for the study of deposit genesis and regional metallogenic regularities.On the basis of geological and petrographic studies,we have conducted molybdenite Re-Os and biotite 40 Ar-39 Ar dating to precisely constrain the timing of mineralization in the deposit.The results show that copper mineralization and hydrothermal biotite alteration occurred at 140.6 ± 2.0Ma and 142.8 ± 1.1Ma.A synthesis of diagenesis and existing geochronological data indicates that the Shujiadian deposit formed as a result of the Early Cretaceous giant metallogenic event within the Tongling fault uplift.
Referência(s)