【摘要】 如何运用深地震反射剖面技术同时探测大型金属矿集区浅自几百米,深至地壳底部的地壳精细结构,揭示成矿的深部过程,是一项极具挑战性的攻关实验内容。本文针对庐枞金属矿集区的浅深兼顾的探测目标,实验了一种区域长剖面和矿集区剖面结合的变观测系统采集技术。结果表明,区域长剖面使用40m道距,240m炮距,18～20m井深,16～20kg药量,中间放炮,720道双边接收,60次覆盖的采集参数能够获得浅层至Moho的有效反射,揭示出成矿区的深部构造。矿集区剖面加密道距至10m,炮距80m,将覆盖次数增加到90次,并采用十字测线的拟三维采集技术能有效补充获得丰富的矿区浅层信息,揭露出浅层控矿构造及其与深部的联系。在经费有限的前提下,采用上述变观测系统方法来保证获得浅、深多重反射信息的采集技术是可行的,实际结果证实了该方法技术实验的成功。更多还原

【Abstract】 How to probe fine structure from the shallow several hundred meters to the bottom of crust by deep seismic reflection profile and to discover deep process of mineralization is a challenging experiment.We test a changeable observing system of deep seismic reflection aiming at revealing shallow and deep target in Luzong metallic ore concentration area.The result demonstrate the acquirement parameters of 40m group interval,240 shot interval,18~20m shot depth,16~20kg charge size,60 folds and 720 channel are able to acquire effective reflections from shallow layer to Moho.In the interior of the ore concentration area,reducing the group interval to 10m and the shot interval to 80m with 90 fold,and designing a pseudo 3D technology with crossing lines is effective for obtaining additional shallow reflections in ore area and discovering ore-controlling structure in shallow and the relation with deep structure.Under limited fund,applying above changeable observation system to get multiple reflection information from shallow and deep is feasible.Our experiment results confirm the success of the test about this technology.更多还原