The Qiman Tagh and the Qaidam Basin within the northern Tibetan Plateau are contrasting in geomorphological, geological, and geophysical features. The Yingxiong Range is the largest anticlinal belt in the SW Qaidam Basin and holds a key in understanding the relationship between the above two tectonic units. Herein, we investigated the geometry, shortening, timing and mechanism of the structural deformation across the Yingxiong Range by integrating field mapping, interpretation of 3‐D/2‐D seismic reflection data and analogue modeling. The structural interpretation demonstrates that the Yingxiong Range is primarily controlled by NE‐directed basement‐involved reverse faults. These faults likely sole into a décollement layer at depth of ~15 km through the excess area‐depth analysis. This pattern is complicated by the development of a local salt layer that decouples the deformation of underlying and overlying strata, as indicated by analogue modeling. Deformation initially occurred at ~8.1 Ma but strengthened at ~2.5 Ma, with total shortening up to ~5 km in the NW part but decreasing to <2 km to the SE. Together with published results, our findings revealed an NE‐directed thrust system involving the Qiman Tagh and the SW Qaidam Basin, with the Yingxiong Range as the front of this system. We further inferred that this NE‐directed thrust system in the upper crust, together with the previously identified SW‐directed deep reverse fault offsetting the Moho, may form a southwestward tapering tectonic wedge, which likely results from the heterogeneity of lithospheric mantle between the Qaidam Basin and the Qiman Tagh‐East Kunlun Shan.

中文翻译：

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青藏高原北部齐曼塔格与柴达木盆地之间的结构耦合：结合野外测绘，地震成像和模拟建模的盈雄山脉视角

青藏高原北部的齐曼塔格（Qiman Tagh）和柴达木盆地（Qaidam Basin）在地貌，地质和地球物理特征方面形成对比。盈雄山脉是柴达木盆地西南部最大的背斜带，是理解上述两个构造单元之间关系的关键。在这里，我们通过整合野外测绘，3D / 2D地震反射数据解释和模拟建模，研究了英熊山脉构造变形的几何形状，缩短，时间和机理。构造解释表明，应雄山脉主要受NE定向基底相关的逆断层控制。通过多余的区域深度分析，这些断层可能会在约15 km的深度处进入剥脱层。如模拟建模所示，这种模式由于局部盐层的发展而变得复杂，该盐层将底层和上覆地层的变形解耦。变形最初发生在〜8.1 Ma，但在〜2.5 Ma时加强，在西北部分总缩短到〜5 km，而到东南则减少到<2 km。连同已发表的结果，我们的研究结果揭示了一个由齐曼塔格和柴达木盆地盆地组成的NE导向推力系统，其中以应雄山脉为该系统的前缘。我们进一步推断，上地壳中的这种NE向逆冲推力系统，与先前确定的偏向Moho的西南向深逆断层一起，可能会形成一个西南向锥形的构造楔，