In this study, we present a high-resolution, 3-D S wave velocity (Vs) model of the crust and uppermost mantle beneath the Liaodong area at the northeast margin of the North China Craton (NCC). We build the model based on ambient noise tomography. Ambient noise data were obtained from both permanent stations and two new broad-band station profiles covering the Dandong-Tongliao (NCISP-10) and Baishan-Kuandian (NCISP-11) areas of the Liaodong-jilin region from October 2016 to December 2019. Our model reveals that different sides of the Tanlu Fault exhibited different Vs anomalies in both the upper crust and lithospheric upper mantle. Low Vs anomalies are observed in the west of the Tanlu Fault, which are interpreted to represent compositional variations at the crustal level. On the eastern side, low Vs anomalies are imaged which appear to represent “heat” or “hot material” derived from the deep mantle. A high Vs anomaly imaged in the southwest of the Songliao basin spatially coincides with a geologic feature referred to as the southwest uplift, which divides the basin into two secondary depressions. The Vs anomaly is inferred to represent cold mafic magma produced by the subduction of the Pacific Plate during the Late Cretaceous. Upwelling of mantle materials provide the best explanation for a mass of hot lithosphere. They underplated at the base of the crust, which formed crustal reservoirs and was eventually emplaced as plutons or erupted as volcanic rocks observed around the study area.

在这项研究中，我们提出了华北克拉通（NCC）东北缘辽东地区地壳和最上地幔的高分辨率 3-DS 波速（Vs）模型。我们基于环境噪声断层扫描建立模型。从 2016 年 10 月至 2019 年 12 月覆盖辽东-吉林地区丹东-通辽 (NCISP-10) 和白山-宽甸 (NCISP-11) 地区的两个常设台站和两个新的宽带台站剖面获得环境噪声数据。我们的模型揭示了郯庐断裂带的不同侧面在上地壳和岩石圈上地幔中都表现出不同的 Vs 异常。在郯庐断层以西观察到低 Vs 异常，这被解释为代表地壳水平的成分变化。在东边，成像的低 Vs 异常似乎代表来自深部地幔的“热”或“热物质”。松辽盆地西南部成像的高 Vs 异常在空间上与称为西南隆起的地质特征相吻合，将盆地分为两个次生凹陷。Vs异常被推断为晚白垩世太平洋板块俯冲产生的冷基性岩浆。地幔物质的上涌为大量热岩石圈提供了最好的解释。它们位于地壳底部，形成地壳储层，最终形成岩体或在研究区域周围观察到火山岩时喷发。松辽盆地西南部成像的高 Vs 异常在空间上与称为西南隆起的地质特征相吻合，将盆地分为两个次生凹陷。Vs异常被推断为晚白垩世太平洋板块俯冲产生的冷基性岩浆。地幔物质的上涌为大量热岩石圈提供了最好的解释。它们位于地壳底部，形成地壳储层，最终形成岩体或在研究区域周围观察到火山岩时喷发。松辽盆地西南部成像的高 Vs 异常在空间上与称为西南隆起的地质特征相吻合，将盆地分为两个次生凹陷。Vs异常被推断为晚白垩世太平洋板块俯冲产生的冷基性岩浆。地幔物质的上涌为大量热岩石圈提供了最好的解释。它们位于地壳底部，形成地壳储层，最终形成岩体或在研究区域周围观察到火山岩时喷发。地幔物质的上涌为大量热岩石圈提供了最好的解释。它们位于地壳底部，形成地壳储层，最终形成岩体或在研究区域周围观察到火山岩时喷发。地幔物质的上涌为大量热岩石圈提供了最好的解释。它们位于地壳底部，形成地壳储层，最终形成岩体或在研究区域周围观察到火山岩时喷发。