中国东南部地区的地壳变形机制和深部成矿机制一直存在争议.本研究基于中国地震台网207个地震站观测到的地震波形数据,采用接收函数方法计算中国东南部的地壳厚度和地壳内岩石的泊松比.结果表明,研究区东部地壳厚度约为27 km,而西部地壳厚度约为43 km,平均地壳厚度为31 km,地壳呈现西厚东薄趋势.地壳内岩石泊松比的结果显示:华夏块体的南部泊松比较高,平均为0.295,而秦岭大别造山带的地壳岩石泊松比相对较低,平均为0.257.在扬子克拉通的中部以及华夏块体的中东部区域,地壳岩石泊松比为0.257～0.286.通过对比侵入体沉积岩和火成岩的泊松比,初步推断金属矿物系统的形成可能与造山和热液沉积矿床有关,这表明研究区内多期岩浆作用和成矿作用是由构造?岩浆?热事件引起的.而华夏块体东南边缘和上场子克拉通的东北区域地壳岩石的高泊松比可能与中生代中下地壳镁铁质部分熔融有关,同时部分熔融也为岩浆入侵和金属矿床的形成提供了重要环境.“,”Crustal deformation and deep metallogenic mechanisms in southeastern (SE) China are still debated. In this study, we applied the receiver function method to measure crustal thickness and Poisson\'s ratio for crustal rock using teleseismic data recorded at 207 seismic stations from China Earthquake Administration Network. The results showed that crustal thickness varied from ～27 km in the eastern part to ～43 km in the western part of the study area, with an average crustal thickness of 31 km. The crust is thick in the west and thin in the east. The observed Poisson\'s ratio for crustal rock was relatively high in the southern Cathaysia Block (CB), with an average of 0.295, while in the Qinling—Dabie terrane, it was relatively low, with an average of 0.257. In the middle of the Yangtze craton and central east of the CB, Poisson\'s ratio for crustal rock varied from 0.257 to 0.286. By comparing Poisson\'s ratio of the intrusive deposits with that of igneous rocks in volcanic complexes, we deduced that the metallic mineral system might be associated with orogenic and hydrothermal deposits. These results indicated that multistage magma and mineralization in the study area might be attributed to the tectonic-magma-thermal event. The high Poisson\'s ratio for crustal rock in the southeastern margin of the CB and northeastern Upper Yangtze Craton might be related to Mesozoic lower crustal mafic partial melt, which provides an important environment for various magmatic intrusions and metallogenies.