Collaborative Research: A Deeptow Magnetic Survey of the Jurassic Quiet Zone
Collaborative Research: A Deeptow Magnetic Survey of the Jurassic Quiet Zone
批准号:
0099161
负责人:
William Sager
金额:
$15.35万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
2001
资助国家:
美国
项目状态:
已结题
起止时间:
2001-11-15 至 2005-10-31
中文摘要
由于侏罗纪海洋地壳只发生在少数几个地方,因此磁性侏罗纪安静带的性质尚未得到解决。海洋钻探项目801C孔获得了新的结果,表明侏罗纪有多达6次极性逆转或强度事件。该项目将围绕801C附近的区域进行一套近底部深拖磁剖面,然后向外扩展,将现有的1992年深拖线向南延伸至磁粗糙-光滑边界,该边界被认为是该地区扩展序列的终点。深拖磁测可以提高信噪比,减少日噪声问题,减轻水深引起的衰减。
英文摘要
The nature of the magnetic Jurassic Quiet Zone is unresolved because Jurassic ocean crust occurs in only a few locations. New results have been obtained at Ocean Drilling Project Hole 801C suggesting up to six polarity reversals or intensity events within the Jurassic. This project will conduct a nested set of near-bottom deeptow magnetic profiles encompassing the region around 801C and then expanding out to extend the existing 1992 deeptow lines south to the magnetic rough-smooth boundary which is thought to define the end of the spreading sequence in the area. The deeptowed magnetic survey will boost the signal to noise ratio, reduce the diurnal noise problem and mitigate the attenuation due to water depth.
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