应用反射率十字图解研究了中国部分地区下古生界地层中动物有机碎屑笔石的光学各向异性。
The optical anisotropy of zooclast graptolite in some Paleozoic strata of China has been studied using reflectance cross-plot analysis.
杨金沟矿区白钨矿体产于下古生界五道沟群地层与印支期二长花岗岩内外接触带中。
The scheelite orebody of the Yangjingou mining area occurred in the contact zone of the lower Paleozoic Wudaogou Group strata and the Indo-Sinian adamellite.
中生代晚期地温梯度高，是古生界碳酸盐岩及煤系地层的主要生气期和运移期。
The Late Mesozoic characterized by higher temperature gradient is main period of gas generation and migration of Paleozoic coal series and carbonates.
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