... depth zone of earth 地球深带 derived fossils 次生化石 Des Moinesian 德莫阶 ...
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The ore-forming material and fluid was derived from the depth of the Earth especially from upper mantle or crust-mantle mixing zone , due to alkali-rich magma activity during late Yanshanian epoch.
成矿流体和主要矿质均源于地球深部，以上地幔或壳幔混合带为主，与燕山晚期富碱岩浆活动密切相关。
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