当前位置: X-MOL 学术GFF › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
The Alpha-Mendeleev ridge a large igneous province with continental affinities
GFF ( IF 1.2 ) Pub Date : 2019-09-30 , DOI: 10.1080/11035897.2019.1655789
H. Ruth Jackson 1 , D. Chian 2
Affiliation  

ABSTRACT The Alpha Ridge-Mendeleev Rise (AMR) is the major bathymetric feature in the Amerasia Basin of the Arctic Ocean. Its tectonic history is controversial due to its remote location in ice covered waters making data acquisition difficult, resulting in the lack of diagnostic data. Analysis of the wide-angle reflection/refraction data based on the compressional waves (P-waves) from the AMR indicates that its velocity/depth structure is typical of large igneous provinces (LIPs). LIPs can form on either oceanic or continental crust and can exhibit complex history of development. Here converted shear waves (S-wave) on the Alpha Ridge have been used to calculate Poisson’s ratios and many of measured values are within the felsic range in the upper crust. They are comparable to published S-waves from the Mendeleev Rise. They are also consistent with the results of Rayleigh-wave group-velocity analysis that indicate the Alpha Ridge in adjacent northern Canada has an intermediate composition. Based on magnetics, pseudogravity and volumetric considerations the High Arctic Large Igneous Province (HALIP) most closely resembles the Kerguelen Plateau, a LIP with a continental component. The geophysical characteristics of the AMR are compatible with a number of other LIPs that have continental affinities. A variety of offshore information from dredges and cores and onshore geological data support continental fragments incorporated in the AMR.

中文翻译:

阿尔法-门捷列夫海脊是一个与大陆有亲缘关系的大型火成岩省

摘要 阿尔法海岭-门捷列夫海隆 (AMR) 是北冰洋亚美亚盆地的主要测深特征。它的构造历史是有争议的,因为它位于冰覆盖水域的偏远位置,使得数据采集变得困难,导致缺乏诊断数据。基于来自 AMR 的压缩波(P 波)的广角反射/折射数据分析表明,其速度/深度结构是典型的大型火成岩区(LIP)。LIP 可以在大洋地壳或大陆地壳上形成,并且可以表现出复杂的发展历史。在这里,阿尔法海脊上的转换横波(S 波)已被用于计算泊松比,并且许多测量值都在上地壳的长英质范围内。它们可与来自门捷列夫上升的已发布 S 波相媲美。它们也与瑞利波群速度分析的结果一致,该分析表明邻近加拿大北部的阿尔法海岭具有中间成分。基于磁学、伪重力和体积考虑,高北极大火成岩省 (HALIP) 最类似于凯尔盖朗高原,这是一个具有大陆成分的 LIP。AMR 的地球物理特征与许多其他具有大陆亲缘关系的 LIP 兼容。来自疏浚和岩心的各种海上信息以及陆上地质数据支持纳入 AMR 的大陆碎片。伪重力和体积考虑因素 高北极大火成岩省 (HALIP) 最类似于凯尔盖朗高原,这是一个具有大陆成分的 LIP。AMR 的地球物理特征与许多其他具有大陆亲缘关系的 LIP 兼容。来自疏浚和岩心的各种海上信息以及陆上地质数据支持纳入 AMR 的大陆碎片。伪重力和体积考虑因素 高北极大火成岩省 (HALIP) 最类似于凯尔盖朗高原,这是一个具有大陆成分的 LIP。AMR 的地球物理特征与许多其他具有大陆亲缘关系的 LIP 兼容。来自疏浚和岩心的各种海上信息以及陆上地质数据支持纳入 AMR 的大陆碎片。
更新日期:2019-09-30
down
wechat
bug