“华北冰盖”遗迹的发现及山东丘陵岩溶地貌塑造机制研究  

Discovery of Remains of the"North China Ice Sheet"and Study on the Shaping Mechanism of Karst Landform in Hills of Shandong Province

作　　者：王照波 赵向阳 李宝杰 WANG Zhao-bo;ZHAO Xiang-yang;LI Bao-jie(Key Laboratory of Gold Mineralization Process and Resource Utilization of the Ministry of Land and Resources,Jinan 250013,China;Yimeng National geopark Management Office,Linyi 273304,China;Shandong Compass Mineral Exploration co.,Ltd,Linyi 276006,China;Natural Resources and Planning Bureau of Pingyi County,Linyi 273304,China)

机构地区：[1]自然资源部金矿成矿过程与资源利用重点实验室,山东济南250013 [2]沂蒙山国家地质公园管理局,山东临沂273304 [3]山东指南针矿产勘查有限公司,山东临沂276006 [4]平邑县自然资源和规划局,山东临沂273304

出　　处：《东华理工大学学报（自然科学版）》2022年第1期19-28,共10页Journal of East China University of Technology(Natural Science)

基　　金：自然资源部金矿成矿过程与资源利用重点实验室开放基金项目“山东蒙山全新世冰川遗迹堆积年龄与气候变化”(KFKT202121);山东指南针矿产勘查有限公司项目“东亚冷槽探索计划”(20180101)。

摘　　要：在冰斗系统、三角脊链、冰斗边界定律等冰川作用理论的基础上,依托卫星遥感技术提供的大视域俯视视角观察山体地貌,突破以往以地面视野对山体地貌观察的局限性,研究发现山东广泛分布的由灰岩构成的丘陵地貌并非以往认为的岩溶成因(喀斯特地貌),而是冰盖侵蚀作用形成的龙纹状三角脊链。通过火山喷发玄武岩与地貌、沉积的压覆关系,约束了冰盖发生时间为(7.86±0.5)Ma~(6.31±0.23)Ma,属于中新世晚期,以此建立了“天宝冰期”。根据冰蚀地貌特征解译,天宝冰期冰盖分布在太行山以东,松辽分水岭以南,东含部分黄海大陆架,南至大别山北麓,以此提出了“华北冰盖”。天宝冰期与晚中新世的孢粉、深海沉积、红黏土等记录的气候演化具有吻合性。研究认为,我国东部季风气候属于北极冰盖高压气候的外延,与青藏高原的隆起无关,华北冰盖的形成与冰期季风冷暖气候的交锋有关。青藏高原的隆起导致了西北内陆的干旱,冰期进一步加强了西北内陆植被的退化,冰期西北风增加风尘物质来源的同时也增强了输送动力,冰期风尘沉积与东部冰川分布存在此消彼长的叠合关系,风尘沉积增加了冰碛物中的泥质成分,这是东部冰碛物存在双峰特征的根本原因。Based on the theories of glaciation such as ice bucket system,triangle ridge,and the law of ice bucket boundaries,relying on satellite remote sensing technology that provides a great sight angle of view overlooking the mountain terrain,in order to make a breakthrough in the limitations of the previous view of mountain landscape with the ground observation,it is found that the hilly landform composed of limestone in Shandong province is not of karst origin,but the erosion of the ice sheet that forms the dragon like triangular ridge chain.According to the relationship between volcanic eruption basalt and geomorphology and deposition,the ice cap occurred between(7.86±0.5)Ma and(6.31±0.23)Ma,belonging to the late Miocene,thus establishing the"Tianbao Ice Age".According to the characteristic interpretation,the Tianbao Ice cover was distributed in the east of Taihang Mountain,south of the Songliao watershed,east of the Yellow Sea continental shelf,and south of the Dabie Mountain.The Tianbao Ice Age is consistent with the climate evolution recorded in the late Miocene,such as palynology,deep-sea deposition and red clay.It is concluded that the eastern monsoon climate in China is an extension of the high-pressure climate of the Arctic ice sheet and has nothing to do with the uplift of the Qinghai-Tibet Plateau,and the formation of the north China ice sheet is related to the collision of the cold and warm monsoon climate in the glacial period.The uplift of Qinghai-Tibet Plateau in the northwest inland arid,glacial further strengthened the northwest inland vegetation degradation,glacial mistral increased the material sources of dust,as well as to enhance the transmission power,eastern dust deposition and distribution of glacial ice age related composite relation,dust deposition increased till the argillaceous components,this is the eastern moraine bimodal characteristics of the root cause.

关 键 词：冰蚀地貌 冰盖 地貌过程 冰川岩溶 遥感 

分 类 号：P534.63[天文地球—第四纪地质学] P343.6[天文地球—古生物学与地层学]