The ^190Pt-^186Os system should be a unique tracer for mantle processes be-cause both Pt and Os are concentrated in the mantle.The ^190Pt-^186Os system will als
Microscopic and SEM observations of thin sections and kerogens and GC-MS analyses of aromatic fractions in sediment extracts and pyrolysis products of kerogens
The experiments on the enrichment of gold by bacteria indicate that bacteria have a very intense capacity of enriching gold and act as an arrester of trace gold
A symplectite of pyrite and magnetite in the massive sulphide ore of the Mashan mine,Anhui Province,is interpreted to have been formed by their replacing earli