文章详细信息 关键词： 贺兰山汝箕沟;;三叠纪;;钙质结核;;延长组 [gap=634]Keywords: Rujigou of Helan Mountain;Triassic;calcareous coneretions;Yanchang Group
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Formation factors and mechanism of the laumontite in upper Triassic Yanchang group of Jingan oilfield are analyzed.
分析了靖安油田上三叠系延长统浊沸石的形成条件及形成机理。
The main control factors of sequence formation are tectonics and climate change in continental sequences of Yanchang Group in North Shaanxi Province.
在陕北地区延长组陆相层序地层中，层序形成的主要控制因素是构造运动和气候变化。
The number of enterprises with sales revenue over RMB10 billion grew from 4 to 23, among which, the sales revenue of Yanchang Group exceed RMB100 billion.
销售收入过百亿的企业从4家增加到23家，其中延长集团突破千亿元大关。
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