胡敏章, 李建成, 徐新禹, 金涛勇, 吴云龙. 全球1°×1°海洋岩石圈有效弹性厚度模型[J]. 武汉大学学报 ( 信息科学版), 2017, 42(5): 575-582. DOI: 10.13203/j.whugis20140933
引用本文: 胡敏章, 李建成, 徐新禹, 金涛勇, 吴云龙. 全球1°×1°海洋岩石圈有效弹性厚度模型[J]. 武汉大学学报 ( 信息科学版), 2017, 42(5): 575-582. DOI: 10.13203/j.whugis20140933
HU Minzhang, LI Jiancheng, XU Xinyu, JIN Taoyong, WU Yunlong. A 1°×1° Model for Lithospheric Effective Elastic Thickness over Global Seafloor[J]. Geomatics and Information Science of Wuhan University, 2017, 42(5): 575-582. DOI: 10.13203/j.whugis20140933
Citation: HU Minzhang, LI Jiancheng, XU Xinyu, JIN Taoyong, WU Yunlong. A 1°×1° Model for Lithospheric Effective Elastic Thickness over Global Seafloor[J]. Geomatics and Information Science of Wuhan University, 2017, 42(5): 575-582. DOI: 10.13203/j.whugis20140933

全球1°×1°海洋岩石圈有效弹性厚度模型

A 1°×1° Model for Lithospheric Effective Elastic Thickness over Global Seafloor

  • 摘要: 利用岩石圈挠曲均衡原理,联合海底地形模型和测高重力异常数据,采用滑动窗口导纳技术(moving window admittance technique,MWAT)计算了全球1°×1°海洋岩石圈有效弹性厚度模型。结果表明,海洋岩石圈有效弹性厚度总体较小,10 km以下区域约占70%,15 km以下约占85.4%,均值和标准差分别约为10 km和6.7 km。岩石圈有效弹性厚度20 km以上的区域主要位于海沟外隆地区,洋中脊岩石圈有效弹性厚度一般小于5 km;被动大陆边缘,如澳洲大陆南缘,岩石圈有效弹性厚度一般也较小;太平洋的海山密集分布地区,岩石圈有效弹性厚度一般为10~20 km。

     

    Abstract: Based on the flexural isostasy model of the lithosphere, a 1°×1° model of lithospheric effective elastic thickness over the global seafloor was calculated by the Moving Window Admittance Technique (MWAT) method, using bathymetry and gravity anomalies derived from altimetry data. The results show that the lithospheric effective elastic thickness over the seafloor is generally small. About 70% of the seafloor has an effective elastic thickness of lower than 10 km, and 85.4% are lower than 15 km. The mean and standard deviation of effective elastic thickness is about 10 km and 6.7 km, respectively. The lithosphere with an effective elastic thickness larger than 20 km is mainly located in out rise of the trenches. The lithosphere over the mid-ocean ridge usually has effective elastic thickness of lower than 5km. The strength of lithosphere over the passive continental margin, such as the southern margin of the Australian continent, is also weak. The effective elastic thickness of lithosphere over the seamount area of the Pacific is about 10 to 20 km.

     

/

返回文章
返回