N<sub>2</sub>-Ar-He systematics and source of ore-forming fluid in Changkeng Au-Ag depos

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Changkeng Au-Ag deposit is a newly-discovered new type precious metal deposit. N<sub>2</sub>-Ar-He systematics studies and <sup>3</sup>He/<sup>4</sup>He and δD-δ<sup>18</sup>O composition analyses show that
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