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在澳大利亚大陆北缘与松巴—塞拉姆的斑达岛弧之间正在积极地碰撞。在松巴岛以西,印度洋板块正在向大洋俯冲系中东南亚南缘之下的爪哇海沟中俯冲下去,伴随有洋底增生杂岩和弧前盆地,其后侧是积极活动的火山弧.松巴做大陆岛是弧前盆地的异常特征。在松巴岛西南澳大利亚边缘沉积开始进入俯冲系的部位,变形前峰带向南隆起,增生杂岩升出海平面。此处的弧前盆地宽达400km,但向东却减小到150km,这是因为澳大利亚大陆架的前进而使变形前峰带向北推进了。在帝汶海槽中,达到中侏罗纪破裂不整合面的澳大利亚边缘沉积上升隆起并向南逆冲,形成了一系列向帝汶南岸的海脊。增生的澳大利亚沉积出露于Kolbano地
A clash is actively struck between the northern tip of the Australian mainland and the arc of Canda Isle of Semba. To the west of Sumba Island, the Indian Ocean plate is subducting towards the subduction zone in the Java trench below the southern margin of Central South East Asia, accompanied by ocean floor accretionary complexes and forearc basins, and posteriorly active volcanic arcs. Doing the continental island is an anomalous characteristic of the pre-arc basin. Sedimentary sediments began to enter the subduction system on the southwestern margin of the island of Sumba, and the pre-deformation peak zone swelled southward and the accretionary complex rock rose to sea level. The forearc basin here is as wide as 400 km wide, but decreases eastward to 150 km because of the advance of the Australian continental shelf and the advancement of the pre-deformation peak to the north. In the Timor Trough, the Australian marginal sediments that reach the unconformity of the Middle Jurassic Rupture rise and rise southward and form a series of ridges on the south bank of Timor. Proliferation of Australian sediments exposed in Kolbano