海南岛莺歌海现代和全新世海滩岩与沙丘岩的胶结组构和成岩作用
CEMENTATION FABRICS AND DIAGENSIS OF THE RECENT AND HOLOCENE BEACH AND DUNE ROCKS IN YINGGEHAI, HAINAN ISLAND
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摘要: 海南岛乐东县莺歌海盐场南海岸,自前滨至滨岸沙丘发育有现代和全新世海滩岩与沙丘岩。这些岩石的产状、胶结物和胶结组构所反映的成岩作用特征,提供了一个全新世以来热带海滨近地表成岩环境中以陆源碎屑为主要成分的沉积物的早期成岩作用模式。一、莺歌海海滩岩与沙丘岩的一般特征1.地理背景 观察和采样地点位于莺歌海盐场南面自水道口至出水口一带海岸(图1)。这一带为砂质海岸,前滨宽约50米,后滨宽约20米,其后为滨岸沙丘带。沙丘带高约+8米,宽100—300米,顶部有木麻黄生长。沙丘带的基部是全新世老沙堤.Abstract: The recent and Holocene along the Yinggehai shoreline south w estern coast of H ainan beach and dune rocks, mainly elastic, have been found from the foreshore to the top of the dune zone on the Island.
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