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台湾东部海岸山脉中的上新世-更新世沉积岩沉积在一个同造山期的碰撞盆地中,该盆地是在活跃的岛弧-大陆碰撞期间紧挨着不断生长的台湾褶皱和冲断层带的东部发育而成的。来自这一地层层序的未变质泥岩埋深达6千米,其中含有来自邻近变质造山带的丰富的碎屑伊利石和绿泥石。在伊利石/蒙脱石的混合层的下段,伊利石所占的百分比突然稍有上升,这为低的古地热梯度(大约为14℃/千米)提供了证据,可能还伴有在短暂的最大埋藏期中所导致的伊利石化作用的动力减缓效应。伊利石的结晶度从该地层层序的底部往顶部增大,这正好与预期的埋藏变质作用的趋势相反,这种逆向的趋势与同一层序中的砂岩岩屑碎屑的实际矿物成份一致,并且记录了在与碰撞相关的抬升和变形期间附近的前进变质岩区进行性蚀顶现象,
The Pliocene-Pleistocene sedimentary rocks in the eastern coastal range of Taiwan have been deposited in a syn-orogenic collision basin adjacent to the growing Taiwanese fold and thrust belts during the active island arc-continental collision Developed Undeformed mudstone from this stratigraphic sequence has a depth of 6 km and contains abundant detritus and chlorite from adjacent metamorphic orogenic belts. A slight increase in the percentage of illite in the lower part of the illite-smectite mixed layer provides evidence of a low paleo-geothermal gradient (around 14 ° C / km), possibly accompanied by a transient Of the maximum burial period caused by Erili Petrification effect of the power-slowing effect. The illite crystallinity increases from the bottom to the top of the stratigraphic sequence exactly in line with the expected trend of burial metamorphism that is consistent with the actual mineral composition of sandstone cuttings in the same sequence , And recorded the progressive eroded phenomenon of the advancing metamorphic rock area in the vicinity of the collision-related uplift and deformation,