Break-Away Corer and Real-Time Video: Construction and Field Testing

弗莱尔，帕特里夏/大学摘要：国际钻探学会建议开发一种新型的沉积物取心系统，该系统有两个重要改进：1)它将使研究人员能够获得海底的实时视频，以便精确定位重力取样器；2)它将在岩芯所在的位置保留一个取心筒，随后可用于更长期的监测工作。该视频系统将用于确保取样器的正确定位，特别是当目标区域“宽度小于一米”时。PI希望在部署取心系统之前已经广泛测绘的地区使用该系统。然后，取样器将能够从科学家感兴趣的预先选定的地点和/或长期现场观测重要的地点获得沉积物。这一新系统被称为“分离式取芯器”，其构造将使外层金属芯筒脱离重量支架。当取回装有岩心样品的称重架和岩心衬垫时，空芯桶会留在沉积物中。随着空的岩心桶有效地覆盖岩心孔，科学家随后可以使用潜水器或ROV来测量和密封岩心孔，创建一个类似于ODP孔中使用的Cork系统的现场观测站。

Fryer, Patricia/ Univ. of Hawaii 98-19183Abstract: The PI's propose to develop a new type of sediment coring system with two important improvements: 1) it will allow researchers to obtain real-time video of the bottom in order to precisely position a gravity corer, and 2) it will leave a core barrel in place at the site of the core that subsequently could be instrumented for longer term monitoring efforts.The video system will be used to ensure proper emplacement of the corer, particularly if the target area is "less than a meter in width". The PI's hope to use this system in areas that have been extensively mapped prior to deployment of the coring system. The corer would then be able to obtain sediment from pre-selected sites of interest to the scientists and/or where long-term in-situ observations are important. The new system, called a "break-away corer", will be constructed so that the outer metal core barrel will break away from the weight stand. The empty core barrel will be left behind in the sediment when the weight stand and core liner with core samples is retrieved. With the empty core barrel effectively casing the core hole, scientists could subsequently use a submersible or an ROV to instrument and seal the core hole, creating an in-situ observatory similar to the CORK systems used in ODP holes.