The Tianbaoshan Formation belongs to the Lower Sinian system , like the Suxiong and KaiJianqiao formations.

研究区的天宝山组和苏雄组、开建桥组酸性、中酸性火山岩、火山碎屑岩同属下震旦系.

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Rare - earth elements and depositional environments of the Sinian system in southwestern Hunan are discussed.

湘西南震旦系是在“江口裂谷”作用下形成的一套特殊地层.

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Haojialou iron deposit occurs in Baoshankou formation of Penglai group in Neoproterozoic Sinian system.

郝家楼铁矿赋存于新元古代震旦纪蓬莱群豹山口组中,矿体呈层状、透镜状.

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