Isotopic data proved that the forming age of the sertengshan group is neoarchean 顶部与中新元古界白云鄂博群、渣尔泰山群不整合接触。
The minerogenetic epoch lasted from paleoarchean to sinian , with neoarchean , paleoproterozoic and mesoproterozoic - qingbaikouan being the culmination periods 成矿时代从古太古代到震旦纪,但以新太古代、古元古代、中元古代青白口纪3个地质时期为成矿高峰期。
百科解释
The Neoarchean (; also spelled Neoarchaean) is a geologic era within the Archaean. It spans the period of time from ?the period being defined chronometrically and not referenced to a specific level in a rock section on Earth.