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在高分辨率SPOT卫星数字影像和大比例尺航片处理、断错地貌制图、野外核实与位移测量基础上,利用宇宙成因核素(~(10)Be,~(26)Al)、碳十四(~(14)C)和热释光(TL)等多种测年手段,厘定了各断错地貌面的形成年龄,得到了阿尔金断裂带不同段落全新世左旋走滑速率:阿克赛以西的中、西段左旋走滑速率可达(17.5±2)mm/a,肃北-石包城段为(11±3.5)mm/a左右,疏勒河口段减少到(4.8±1)mm/a左右,东端宽滩山段仅约(2.2±0.2)mm/a,左旋走滑速率突变点位于阿尔金断裂带中东段存在分支活动逆断层向南东扩展的肃北、石包城和疏勒河等三联点上.矢量分析表明,三联点东、西两侧左旋滑动速率的减少量转换成了阿尔金断裂带中东段南盘北西向活动道断层上的地壳缩短和上盘推覆体抬升,形成了党河南山、大雪山、祁连山等条块山地.因此,青藏高原北部物质向东挤出的速率和幅度是有限的,符合“叠瓦状道冲转换——有限挤出模型”.
Based on the high-resolution SPOT satellite digital images and large-scale aerial photographs processing, the delineation of the fault topography, the field verification and the displacement measurement, using the cosmic nuclide (~ (10) Be, ~ (26) Al) (~ (14) C) and thermoluminescence (TL) were used to determine the age of formation of each faulted landform and the Holocene L-slip velocities in different sections of the Altyn Tagh fault zone were obtained: The strike-slip velocities in the western and western parts of the west reach up to (17.5 ± 2) mm / a, that in the Subei-Shibasheng section is (11 ± 3.5) mm / a, and decrease to (4.8 ± 1) mm / a. The wide-bounded Bendingan section of the eastern margin is only about (2.2 ± 0.2) mm / a. The abrupt change of L-strike slip rate is located in the northern part of the Altyn Tagh fault belt, Baocheng and Shulehe etc. The vectorial analysis shows that the reduction of the left-lateral slip rate on the east and west sides of the triple point transforms into the crustal shortening and the crustal shortening on the northwestbound active fault in the middle section of the Altyn Tagh fault, The plate nappe uplifted and formed the mountainous areas such as the Party’s Nanshan, Da Xue Shan and Qilian Shan etc. Therefore, the rate and amplitude of material extrusion to the east in the northern part of the Qinghai-Tibet Plateau are limited, Combined “sub-tile-shaped red-switch - finite extrusion model.”