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首页> 外文期刊>Journal of Asian earth sciences >Basal accretion, a major mechanism for mountain building in Taiwan revealed in rock thermal history
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Basal accretion, a major mechanism for mountain building in Taiwan revealed in rock thermal history

机译：岩石热史揭示了台湾山地增建的主要机制基础增生

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Graphical abstractDisplay OmittedHighlights•An integrated time-temperature history is revealed for the pro-wedge of Taiwan.•The crucial role of basal accretion is credited based on age and thermal data.•Basal accretion led to mountain root growth prior to late rapid exhumation.AbstractDeep tectonic processes are key integral components in the evolution of mountain belts, while observations of their temporal development are generally obscured by thermal resetting, retrograde alteration and structural overprinting. Here we recorded an integrated rock time-temperature history for the first time in the pro-wedge part of the active Taiwan arc-continent collision starting from sedimentation through cleavage-forming state to its final exhumation. The integrated thermal and age results from the Raman Spectroscopy of Carbonaceous Material (RSCM) method, zircon U-Pb laser ablation dating, andin-situ40Ar/39Ar laser microprobe dating suggest that the basal accretion process was crucial to the development of the Taiwanese orogenic wedge. The basal accretion process commenced early in the mountain building history (∼6 Ma) and gradually migrated to greater depths, as constrained by persistent plate convergence and cleavage formation under nearly isothermal state at similar depths until ∼ 2.5 Ma recorded in the early-accreted units. Such development essentially contributed to mountain root growth by the increased depth of the wedge detachment and the downward wedge thickening during the incipient to full collision stages in the Taiwan mountain belt.
机译： 图形摘要 省略显示 突出显示 • • 根据年龄和体温来认为基础增生的关键作用l数据。 • 基层积聚导致快速发掘晚期之前的山根生长。 摘要 < ce：abstract-sec id =“ as015” view =“ all”> 深部构造过程是山区演化的关键组成部分，它们的时间发展通常被热复位，逆行改变和结构叠印所掩盖。在这里，我们首次记录了活跃的台湾弧-陆碰撞的楔入部分的岩石时间-温度综合历史，从沉积到分裂形成状态直至最终发掘。碳源材料的拉曼光谱法（RSCM），锆石U-Pb激光烧蚀测年法和原位 40 Ar / 39 Ar激光微探针测年表明，基底吸积过程对于台湾造山楔的发育至关重要。基底吸积过程始于山区建造历史的早期（〜6 Ma），并逐渐迁移到更大的深度，这是由于在近似等温状态下在相似深度下持续的板块收敛和卵裂形成所致，直到早期记录的单位中记录了〜2.5 Ma。 。在台湾山地带从初期到完全碰撞阶段，楔形脱离的深度增加和楔形向下增厚，从而促进了山根的生长。

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