Abstract
The Chedu gold deposite is located in the south rim of bikou terrane. It is the first BIF-type gold deposit in shaanxi province. Experiment with electronic probes and scanning electron microscopy, we first discovered silver gold mine and calaverite wrapped in single-grain magnetite.According to the results of hydrogen and oxygen isotope analysis of quartz in gold ore, the value of δ18O is from 16.4 ‰ to 16.6 ‰ and δD is from 16.4 ‰ to 16.6 ‰. This value is similar to the hydrogen and oxygen isotope values of quartz in BIF type iron ore. The discovery of wrapped gold and non-visible gold in magnetite suggests that gold is formed earlier or at the same time as the magnetite crystallizes. It is of great significance to study the genesis mechanism of BIF type gold deposit.
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