Research on deep seismic reflection profile in Luzong ore concentration area: An economical and changeable gathering test.
庐枞金属矿集区深地震反射剖面探测研究: 一种经济的、变化的采集观测系统实验

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.