March 3, 2026SCIENTIA SINICA Terrae0 citationsOpen Access

斜向汇聚促进阿尔金断裂的左旋走滑运动——来自地壳各向异性的证据

Key Points

Left-lateral slip along the Altyn Tagh Fault is influenced by oblique convergence forces.
The average splitting time delays observed are 0.42, 0.61, and 0.68 seconds across different tectonic zones.
Utilizing short-period dense arrays, 43 pairs of crustal anisotropy parameters were analyzed for crustal deformation patterns.
Findings support a model of crustal deformation that explains the uplift and expansion of the Tibetan Plateau.

Abstract

阿尔金断裂系统作为青藏高原北边界，其陆内变形特征对于理解高原隆升和向外扩展机制意义重大。我们利用跨阿尔金断裂系统的短周期密集台阵及周边固定台数据，通过拟合接收函数Pms震相随后方位角变化，获取了43对地壳各向异性参数并分析其地壳变形特征。结果呈现分区性，东塔里木、阿尔金山及柴达木三个构造区平均快波方向分别为ENE-WNW，近E-W以及NW-SE向，平均分裂时差分别为0.42、0.61和0.68 s。东塔里木块体地壳各向异性与其内部古构造走向平行，记录了古老克拉通的化石各向异性。塔里木块体南向底冲和青藏高原北部NNE-NE向挤出分别造成了阿尔金山北缘以及西柴达木下方地壳的纯剪切变形，产生了相应的E-W向及NW-SE向地壳各向异性。塔里木和青藏的斜向汇聚促进阿尔金断裂中段的左旋走滑剪切以及阿尔金山的压扭变形，造就了阿尔金山的隆升并调节了高原物质向外挤出，因而主导了青藏高原北缘的陆内变形模式。

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武澄泷 et al. (2026) studied this question.

synapsesocial.com/papers/69a76818badf0bb9e87e3931 https://doi.org/10.1360/sste-2025-0350

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March 3, 2026SCIENTIA SINICA Terrae0 citationsOpen Access

斜向汇聚促进阿尔金断裂的左旋走滑运动——来自地壳各向异性的证据

武武澄泷涛徐涛徐吉林吉焱林

Key Points

Left-lateral slip along the Altyn Tagh Fault is influenced by oblique convergence forces.
The average splitting time delays observed are 0.42, 0.61, and 0.68 seconds across different tectonic zones.
Utilizing short-period dense arrays, 43 pairs of crustal anisotropy parameters were analyzed for crustal deformation patterns.
Findings support a model of crustal deformation that explains the uplift and expansion of the Tibetan Plateau.

Abstract

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Cite This Study

武澄泷 et al. (2026) studied this question.

synapsesocial.com/papers/69a76818badf0bb9e87e3931 https://doi.org/10.1360/sste-2025-0350

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