通过对辽东湾北部LH01孔柱状岩芯样品进行粒度、孢粉、有孔虫和测年多项环境指标测试,探讨了辽东湾北部晚更新世24 ka BP以来的古环境演变。LH01孔沉积环境经历了晚更新世晚期河湖相沉积-全新世早期海陆交互相沉积-全新世中期浅海相沉积-全新世晚期河口滨海相沉积;气候经历了晚更新世晚期冷较干-晚更新世晚期凉稍润-新仙女木降温-全新世早期凉稍润-全新世中期温暖较润-全新世中期温暖较干-全新世晚期温较干的变化;LH01孔在大约7.5 ka BP发生了盘山海侵。
英文摘要:
Based on the analyses of grain size,sporopollen, foraminifera,AMS~(14) C and OSL dating from LH01 Core in the Northern Liaodong Bay, the evolutions of climate and paleoenvironment since Late Pleistocene are discusses in this paper. LH01 Core has undergone great palaeogeographic changes since Late Pleistocene: rivers and lakes in the Late Pleistocene, marine and lands during the Early Holocene,shallow marine in the Middle Holocene, estuary shallow marine during the Late Holocene. The records of sporopollen show that climate: cool-dry during the Late Pleistocene,cool-wet during the Late Pleistocene, cool-wet in the Early Holocene, hot -wet in the Middle Holocene,hot-dry in the Middle Holocene,warmdry during the LateHo locene. PanShan invasion event is discovered aboaut 7. 5 ka BP in LH01 Core.