Correlated crustal and mantle melting documents proto-Tibetan Plateau growth

作者：Wei Li, Rizheng He, Xiaohui Yuan, Felix Schneider, Frederik Tilmann, Zhen Guo, Yongshun John Chen · 发表于：National Science Review · 年份：2024 · DOI：10.1093/nsr/nwae257 · 被引用次数：17 · 研究领域：High-pressure geophysics and materials、Geological and Geochemical Analysis、Seismic Waves and Analysis

ABSTRACT The mechanism that causes the rapid uplift and active magmatism of the Hoh-Xil Basin in the northern Tibetan Plateau and hence the outward growth of the proto-plateau is highly debated, more specifically, over the relationship between deep dynamics and surface uplift. Until recently the Hoh-Xil Basin remained uncovered by seismic networks due to inaccessibility. Here, based on linear seismic arrays across the Hoh-Xil Basin, we present a three-dimensional S-wave velocity (VS) model of the crust and uppermost mantle structure beneath the Tibetan Plateau from ambient noise tomography. This model exhibits a widespread partially molten crust in the northern Tibetan Plateau but only isolated pockets in the south manifested as low-VS anomalies in the middle crust. The spatial correlation of the widespread low-VS anomalies with strong uppermost mantle low-VS anomalies and young exposed magmatic rocks in the Hoh-Xil Basin suggests that the plateau grew through lithospheric mantle removal and its driven magmatism.