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The middle-to-late Holocene relative sea-level history, highstand and levering effect on the east coast of Malay Peninsula
Global and Planetary Change ( IF 4.0 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.gloplacha.2020.103369
Yaze Zhang , Yongqiang Zong , Haixian Xiong , Tanghua Li , Shuqing Fu , Guangqing Huang , Zhuo Zheng

Abstract This study was conducted to (1) investigate a former mangrove wetland on the east coast of Peninsular Malaysia near Kuantan and produce new sea-level index points (SLIP), and to (2) re-analyzed the modern vegetation and pollen results from a mangrove-swamp transect within the nearby estuary to establish the relationship between vegetation zones and tidal levels for estimating indicative meanings (IM) for the SLIPs. The results indicate that the modern floral and pollen zones match well with the fossil ones, and four IMs were appropriately established. Combining with the recently published SLIPs from Terengganu, the 15 new SLIPs from Kuantan were used to reconstruct the middle-to-late Holocene relative sea-level (RSL) history for the east coast of the Malay Peninsula. This history shows that the RSL reached c. 1.5 m msl around 6500 cal. a BP and rose to c. 2.0 m msl by 4500 cal. a BP. This phase of RSL rise in this far-field site supports the hypothesis that additional ice melting occurred between 7000 and 4000 cal. a BP. During this phase of RSL rise, erosion and redeposition of estuarine sediments occurred at the study site. Since 4000 cal. a BP, the RSL fell gradually to below the present height by 800 cal. a BP. In general, this RSL history matches well with the GIA model with the ICE4G melting history. Furthermore, the SLIPs from the east coast are systematically lower in elevation than those recorded in the west coast. The difference is about 1.5 m in the beginning of the middle Holocene and it decreases gradually towards the late Holocene. This difference, thus, implies the existence of continental levering during the Holocene.

中文翻译:

马来半岛东岸中晚期全新世相对海平面历史、高位及杠杆效应

摘要 本研究旨在 (1) 调查马来西亚半岛东海岸关丹附近的一片原红树林湿地,并产生新的海平面指数 (SLIP),并 (2) 重新分析现代植被和花粉结果。附近河口内的红树林沼泽横断面,以确定植被带和潮汐水平之间的关系,以估计 SLIP 的指示性意义 (IM)。结果表明,现代花和花粉区与化石区匹配良好,并适当建立了四个IM。结合最近发布的登嘉楼 SLIP,来自关丹的 15 个新 SLIP 被用来重建马来半岛东海岸中晚期全新世相对海平面 (RSL) 历史。这段历史表明 RSL 达到了 c。1.5 m msl 约 6500 cal。a BP 并升至 c。2.0 m msl by 4500 cal。一个BP。这个远场站点的 RSL 上升阶段支持了在 7000 到 4000 卡路里之间发生额外冰融化的假设。一个BP。在此 RSL 上升阶段,研究地点发生了河口沉积物的侵蚀和再沉积。从 4000 卡路里开始。a BP,RSL 逐渐下降到低于当前高度 800 cal。一个BP。一般而言,此 RSL 历史与具有 ICE4G 熔化历史的 GIA 模型匹配良好。此外,来自东海岸的 SLIP 的海拔高度低于西海岸记录的高度。中全新世初期相差约1.5 m,至全新世晚期逐渐减小。因此,这种差异意味着在全新世期间存在大陆杠杆作用。这个远场站点的 RSL 上升阶段支持了在 7000 到 4000 卡路里之间发生额外冰融化的假设。一个BP。在此 RSL 上升阶段,研究地点发生了河口沉积物的侵蚀和再沉积。从 4000 卡路里开始。a BP,RSL 逐渐下降到低于当前高度 800 cal。一个BP。一般而言,此 RSL 历史与具有 ICE4G 熔化历史的 GIA 模型匹配良好。此外,来自东海岸的 SLIP 的海拔高度低于西海岸记录的高度。中全新世初期相差约1.5 m,至全新世晚期逐渐减小。因此,这种差异意味着在全新世期间存在大陆杠杆作用。这个远场站点的 RSL 上升阶段支持了在 7000 到 4000 卡路里之间发生额外冰融化的假设。一个BP。在此 RSL 上升阶段,研究地点发生了河口沉积物的侵蚀和再沉积。从 4000 卡路里开始。a BP,RSL 逐渐下降到低于当前高度 800 cal。一个BP。一般而言,此 RSL 历史与具有 ICE4G 熔化历史的 GIA 模型匹配良好。此外,来自东海岸的 SLIP 的海拔高度低于西海岸记录的高度。中全新世初期相差约1.5 m,至全新世晚期逐渐减小。因此,这种差异意味着在全新世期间存在大陆杠杆作用。
更新日期:2021-01-01
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