發(fā)布時(shí)間：2018-01-16 20:37

  本文關(guān)鍵詞：基于GPR圖像的福建長(zhǎng)樂(lè)海岸沙丘沉積構(gòu)造與海岸環(huán)境演變　出處：《海洋科學(xué)》2016年05期 　論文類型：期刊論文

  更多相關(guān)文章： 探地雷達(dá)(GPR) 海岸沙丘 沉積構(gòu)造 海岸環(huán)境 長(zhǎng)樂(lè)

【摘要】：為了探討福建長(zhǎng)樂(lè)東部海岸環(huán)境演變,運(yùn)用探地雷達(dá)(GPR)探測(cè)了研究區(qū)海岸沙丘的沉積構(gòu)造,初步得出以下結(jié)論:(1)研究區(qū)海岸沙丘沉積構(gòu)造主要由海灘沉積和海岸沙丘沉積構(gòu)成,其中下伏沉積為海灘波浪作用形成的波狀交錯(cuò)層理,上覆沉積為風(fēng)成大角度傾斜的交錯(cuò)層理以及局部的水平層理;(2)上部發(fā)育的傾向向背的大角度風(fēng)成交錯(cuò)層理,反映了研究區(qū)豐富的沙源、寬闊的海灘、植被擴(kuò)張的進(jìn)積海岸特點(diǎn);(3)從沉積序列分析,研究區(qū)海岸地貌環(huán)境演變經(jīng)歷了早期的濱岸淺海到晚期的海岸沙丘帶兩個(gè)階段,反映了海岸向東的進(jìn)積過(guò)程中,外力作用由波浪作用為主演變?yōu)轱L(fēng)沙沉積作用為主。
[Abstract]:In order to study the evolution of coastal environment in eastern Changle, Fujian Province, the sedimentary structures of coastal dunes in the study area were investigated by using GPR. The following conclusions are drawn as follows: (1) the coastal dune sedimentary structures in the study area are mainly composed of beach deposits and coastal dune deposits, in which the underlying deposits are the wave-like interlaced bedding formed by the beach waves. The overlying deposits are staggered bedding and local horizontal bedding. (2) the tendency of the upper development to the back of the large angle wind is staggered and stratified, which reflects the characteristics of abundant sand source, wide beach and progradation coast of vegetation expansion in the study area; 3) from the analysis of sedimentary sequence, the evolution of coastal geomorphological environment in the study area has undergone two stages from the early shoreline shallow sea to the late coastal dune zone, which reflects the process of coastal eastward accumulation. The external force has evolved from wave action to aeolian sedimentation.
【作者單位】： 福建師范大學(xué)地理科學(xué)學(xué)院;濕潤(rùn)亞熱帶生態(tài)地理過(guò)程教育部重點(diǎn)實(shí)驗(yàn)室;福建師范大學(xué)地理研究所;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41271031,41301012,U1405231) 福建省自然科學(xué)基金項(xiàng)目(2013J01153,2014J01151)~~
【分類號(hào)】：P737.1
【正文快照】： 海岸沙丘是形成于陸地、海洋和大氣系統(tǒng)交界面的相當(dāng)復(fù)雜的現(xiàn)象[1-3],海岸沙丘的沉積構(gòu)造類型及其組合特征,反映了砂質(zhì)海岸特有的沉積相和沉積環(huán)境。因此,海岸沙丘是重建海岸環(huán)境演變歷史的重要載體。以往對(duì)海岸沙丘沉積構(gòu)造的研究,大多依賴于天然侵蝕剖面、人工探槽的直接觀，

本文編號(hào)：1434751