| 闽南沿海晚更新世地层的初步研究 |
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| 引用本文： | 姚庆元,张虎男,张景文,赵希涛.闽南沿海晚更新世地层的初步研究[J].地震地质,1985,7(4):32. |
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| 作者姓名： | 姚庆元 张虎男 张景文 赵希涛 |
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| 作者单位： | 福建省地震局
(姚庆元)，广东省地震局
(张虎男)，国家地震局地质研究所
(张景文)，中国科学院地质研究所(赵希涛) |
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| 摘 要： | 本文对闽南沿海晚更新世沉积的分布特征和主要的地层剖面进行了描述,并根据野外沉积与地貌观察及~(14)、微体古生物与孢粉分析资料,对上述地层与沉积的年代、成因与古气候状况进行了分析与讨论
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| 关 键 词： | 晚更新世地层 闽南沿海 老红砂 淤泥 莆田 惠安 晚更新世晚期 面中部 黑色泥炭 海陆过渡相 |
A PRELIMINARY STUDY ON THE LATE PLEISTOCENE STRATIGRAPHY ALONG THE COASTAL AREAS OF SOUTHERN FUJIAN |
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| Abstract: | In the coastal area of Southern Fujian,the late Pleistocene sediments have a wide distribution (Fig.1).The late Pleistocene strata are mainly composed of following sediments in ascending order:Dgrey medium-fine sand,2)black mud or peat,and 3)yellow sand and sandy clay.The other possible late Pleistocene deposits,so-called "Old Red Sand",are the semi-cemented,well-sorted,and red quartz silt-fine sand.These deposits are distributed over the bays and gullies of mainland and the islands,and constitute the second terrace,tiebar and other littoral accumulation landforms.In this paper,a number of natural outcrop sections of late Pleistocene strata have been described and drown in Fig.2.Based on the sedimentologic and geomorphologic investigation in the field and the data of 14C dating (Table 1),analyses of foraminifers and ostracods (Table 2) and pollen analysis (Table 3),the following conclusions can be obtained:1.The grey and yellow sand and sandy clay intercalated with black mud or peat belong to the late Late Pleistocene,i.e.the middle and late pleni-glacial substages of the last Glacial Stage,between about 40,000 and 16,000 years B.P..2.The grey and yellow sand and sandy clay,especially the black mud or peat,of the late Late Pleistocene are mainly the deposits of marine-land transitional facies,in part the littoral,and in part lake and swamp facies.3.On the whole,the climate of the late Late Pleistocene was warm and humid,but sometime cooler and drier.4.The "Old Red Sand" is the littoral sediments which were deposited under the heat and humid climate.It might be deposited during the late stage of Late Pleistocene,but the possibility of forming in the earlier period can not be ruled out |
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