吉林大学学报(地球科学版) ›› 2018, Vol. 48 ›› Issue (6): 1845-1853.doi: 10.13278/j.cnki.jjuese.20170220
• 地球探测与信息技术 • 上一篇
杨志龙, 殷长春, 张博, 刘云鹤, 任秀艳, 惠哲剑
Yang Zhilong, Yin Changchun, Zhang Bo, Liu Yunhe, Ren Xiuyan, Hui Zhejian
摘要: 高精度、高效率的深海勘探是当前国家海洋资源勘探开发的研究热点之一,设计观测效率高、勘探成本低的探测方式,开发可精确计算海底复杂电性环境的正演模拟算法有助于推进该研究的进展。本文基于前人的研究经验,引入了全拖曳式深海直流电阻率观测方式,同时考虑到海底沉积环境的电各向异性,开发了基于非结构有限元方法的三维任意各向异性深海直流电阻率正演算法,实现了对海底任意电各向异性情况的仿真模拟。本文算法与层状一维模型半解析解的对比验证了算法的精度。对典型各向异性电性模型的仿真模拟和分析,证明了全拖曳式深海探测方式对海底沉积层和矿产资源电各向异性的高分辨率。在此基础上,总结了电导率各向异性主轴沿笛卡尔坐标旋转时视电阻率分布也发生同方向旋转的视电阻率分布特征,并根据海底地形对各向异性探测的影响进行了简单探讨。
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