L028 Bonaparte Gulf seismic survey, WA, 1956

The Bureau of Mineral Resources seismic party carried out a seismic survey in the Bonaparte Gulf area of north-western Australia between 16th June and 13th October, 1956. The initial objects of the survey were to obtain regional information on the thickness of the sedimentary rocks and on the tectonics of the Bonaparte Gulf Basin, and to establish the applicability of the seismic method in the area. During the course of the survey the party was directed to transfer its attentions to obtaining some detailed information on the Spirit Hill Anticline. This latter work was carried out in response to an application by Westralian Oil Pty. Ltd., which was anxious to select sites for a test boring programme.The seismic results indicate a maximum thickness of sediments of about 20,000 feet in the Carlton Basin and 14,000 feet in the Burt Range Basin. The rocks in both these basins have been folded to a considerable extent and the reflections suggest unconformities within both basins. The seismic reflection method proved successful in indicating geological structure at depth in most of the areas tested.

1956年6月16日至10月13日，矿产资源局（Bureau of Mineral Resources）地震勘探队在澳大利亚西北部波拿巴湾（Bonaparte Gulf）区域开展了一项地震勘探工作。本次勘探的初始目标为获取波拿巴湾盆地（Bonaparte Gulf Basin）沉积岩厚度与构造特征的区域级数据，并验证地震勘探方法在该区域的适用性。勘探实施期间，该队伍接令将工作重心转向获取灵山背斜（Spirit Hill Anticline）的详细地质信息。此项后续工作系应西澳石油私人有限公司（Westralian Oil Pty. Ltd.）的申请开展，该公司亟需选定试验钻孔工程的作业点位。地震勘探结果显示，卡尔顿盆地（Carlton Basin）的沉积物最大厚度约为20000英尺，伯特岭盆地（Burt Range Basin）的沉积物最大厚度则约为14000英尺。上述两个盆地内的岩层均发生了显著褶皱，地震反射信号显示两个盆地内部均存在不整合面。地震反射法在绝大多数受测区域均成功揭示了深部地质构造特征。