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An auriferous ore deposit of industrial scale was discovered by the authors in carbon-aceous rock series or the Jiao-Lai Basin on the North China Platform. The carbonaceousrock series is developed at the bottom of the Cretaceous Laiyang Group which is over 270mthick, and overlies unconformably the Archaean-Proterozoic metamorphic rocks. The series
An auriferous ore deposit of industrial scale was discovered by the authors in carbon-aceous rock series or the Jiao-Lai Basin on the North China Platform. The carbonaceous rock series is developed at the bottom of the Cretaceous Laiyang Group which is over 270 mthick, and overlies unconformably the Archaean-Proterozoic metamorphic rocks. The series