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浅层地震反射法是一种常用的勘探方法.在浅层地震资料处理中,静校正的精度直接影响速度反演的结果和叠加剖面的质量,在地形平缓时,固定基准面静校正可以满足勘探精度的要求,但在复杂地形条件下,其存在较大误差,即使采用浮动基准面,仍会由于地表一致性假设而残余静校正量,不能消除地形起伏引起的影响,为了提高浅层地震反射静校正的精度必须在常规静校正后进行一次剩余静校正,本文给出起伏地形条件下,滑动基准面(过共中心点的水平面即为该共中心点的滑动基准面)的剩余静校正量,该校正量与炮检距、反射层埋深、地层波速以及炮点和接收点高程有关,适用于单一介质和层状介质情况,本文通过对典型地形起伏的3个水平均匀层状介质理论地质模型的速度谱计算和分析,阐明在复杂地形条件下,应用本文提出的剩余静校正方法可以消除地形起伏的影响,提高静校正精度,在此基础上做动校正可以得到高质量的水平叠加剖面. 相似文献
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山东临朐地区新生代玄武岩同位素钾-氩年龄研究 总被引:9,自引:0,他引:9
Isotopic determinations were made on basalts intercalated in the strata with abundant Upper Tertiary fossils. In order to satisfy the needs of K-Ar age determina.tions of younger basalts with lower potasium content, we have made some modifications on the China-made ZhT-1301 massspectrometer, Meanwhile, some improvements and refinements have been made as well on the mass-spectrometer and the argon-extraction system and argen-measureing technique. Our results are: 7.86---13.Sm.y. for the youngest basalts ; 20--24 m.y. for the Shanwang Group with abundant Miocene fossils;and: 44 m.y. for basalts from the lower part of the Shanwang Group. The chronological results are basically in agreement with the stratigraphic sequence. 相似文献
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