苏北泗洪晚更新世淮河古菱齿象化石年代学研究
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摘要
对苏北泗洪县石集的淮河古菱齿象(Palaeoloxodon huaihoensis)进行了光释光(OSL)年代学研究,结果表明,化石埋藏地层年代介于56.2±4.3 Ka B.P.～50.7±4.6 Ka B.P.之间,属晚更新世中期,即MIS 3阶段间冰期。地层归属上更新统戚咀组,为旱季与雨季交替环境下的河漫滩或沼泽湿地沉积。地层特征反映了距今约5.6万年以来该地区在全球"间冰期-冰期"交替变化下的古气候环境。
A relatively complete fossil skeleton of Palaeoloxodon huaihoensis was unearthed at Guitai of Maoshan Village, Shiji Town, Sihong County, northern Jiangsu Province on April, 2016. Stratigraphic analysis and optically-stimulated luminescence(OSL) dating reveals that the burial age of the strata bearing Palaeoloxodon huaihoensis is between 56.2±4.3 Ka and 50.7±4.6 Ka B.P., which belongs to the middle Late Pleistocene or the MIS 3 interglacial stage. The fossil-bearing strata are part of the Upper Pleistocene Qizui Formation, which is mainly composed of yellowish-brown silty clay with yellowish-brown and gray silt rich in iron-manganese and calcium nodules. The strata were deposited in floodplain, swampland, and wetland environments with alternating dry and rainy seasons. The Holocene strata are missing. The characteristics of lithology and biostratigraphy reflect the evolution of paleoclimatic conditions in this region during the global alternations of glacial and interglacial periods since 56 thousand years ago.
A relatively complete fossil skeleton of Palaeoloxodon huaihoensis was unearthed at Guitai of Maoshan Village, Shiji Town, Sihong County, northern Jiangsu Province on April, 2016. Stratigraphic analysis and optically-stimulated luminescence(OSL) dating reveals that the burial age of the strata bearing Palaeoloxodon huaihoensis is between 56.2±4.3 Ka and 50.7±4.6 Ka B.P., which belongs to the middle Late Pleistocene or the MIS 3 interglacial stage. The fossil-bearing strata are part of the Upper Pleistocene Qizui Formation, which is mainly composed of yellowish-brown silty clay with yellowish-brown and gray silt rich in iron-manganese and calcium nodules. The strata were deposited in floodplain, swampland, and wetland environments with alternating dry and rainy seasons. The Holocene strata are missing. The characteristics of lithology and biostratigraphy reflect the evolution of paleoclimatic conditions in this region during the global alternations of glacial and interglacial periods since 56 thousand years ago.
引文
刘备,朱光,胡红雷,宋利宏.2015.郯庐断裂带江苏段新构造活动规律分析.地质学报,89(8):1352-1366.
钱迈平,高天山,蒋仁,朱清波,靳国栋,于俊杰,马雪,姜杨.2017.苏北泗洪晚更新世淮河古菱齿象化石层位及其古环境.地层学杂志,41(2):173-178.
钱迈平,邹松梅,李爽,蒋仁,孙爱莲,祖益康,时飞,于俊杰,彭博,普剑威.2016.江苏泗洪晚更新世淮河古菱齿象化石的发现.地质学刊,(4):545-551.
张克旗,吴中海,吕同艳,冯卉.2015.光释光测年法--综述及进展.地质通报,34(1):183-203.
杨钟健,周明镇.1955.安徽泗洪及五河县东部第四纪地层和化石产地.古生物学报,3(1):47-53.
朱光,王薇,顾承串,张帅,刘程.2016.郯庐断裂带晚中生代演化历史及其对华北克拉通破坏过程的指示.岩石学报,32(4):935-949.
邹松梅.2015.建立江苏泗洪双沟地质公园的可行性研究.地质学刊,(1):158-170
Ehlers J&Gibbard P L.2007.The extent and chronology of Cenozoic global glaciation.Quaternary International,164-165:6-20.
Gibbard P L.2013.Quaternary stratigraphy/Climatostratigraphy.Encyclopedia of Quaternary Science(Second Edition).222-226.
钱迈平,高天山,蒋仁,朱清波,靳国栋,于俊杰,马雪,姜杨.2017.苏北泗洪晚更新世淮河古菱齿象化石层位及其古环境.地层学杂志,41(2):173-178.
钱迈平,邹松梅,李爽,蒋仁,孙爱莲,祖益康,时飞,于俊杰,彭博,普剑威.2016.江苏泗洪晚更新世淮河古菱齿象化石的发现.地质学刊,(4):545-551.
张克旗,吴中海,吕同艳,冯卉.2015.光释光测年法--综述及进展.地质通报,34(1):183-203.
杨钟健,周明镇.1955.安徽泗洪及五河县东部第四纪地层和化石产地.古生物学报,3(1):47-53.
朱光,王薇,顾承串,张帅,刘程.2016.郯庐断裂带晚中生代演化历史及其对华北克拉通破坏过程的指示.岩石学报,32(4):935-949.
邹松梅.2015.建立江苏泗洪双沟地质公园的可行性研究.地质学刊,(1):158-170
Ehlers J&Gibbard P L.2007.The extent and chronology of Cenozoic global glaciation.Quaternary International,164-165:6-20.
Gibbard P L.2013.Quaternary stratigraphy/Climatostratigraphy.Encyclopedia of Quaternary Science(Second Edition).222-226.