%0 Journal Article
%T DIAGENESJS OF MODERN AEOLIANITE (DUNE-ROCE) AND ITS GEOMORPHOLOGIC SIGNIFICANCE ALONG THE COAST OF HAINAN ISLAND<br>海南岛现代风成岩(沙丘岩)的形成及其地貌意义
%A Wu Kegang
%A <br>吴克刚
%J 地理研究
%D 1988
%I 
%X This paper deal with the dune-rock which covered the seaward slope and top of coastal dune like a cap along the coast of Hainan Island, South China SeaEven though distribution along the coast is like beach-rock and ridge-rock, the coastal dune-rock is different from them in diagenetic environment and geomorphologic significance and can be distinguished by their sepe-rate sedimentary textures; structures and cements, A few identified types of low-Mg calcite cement that have been observed in the dune-rock are. Rim cement, meniscus cement, ghost structure, syntaxial rims, prefill cement and so on which reveal that the dune-rock is formed in vadose zone by leaching and evaporation of fresh water.Two conditions are necessary to form dune-rock along a dune coast.One is that at least 8 % CaCO3 is required for cementation(The contents of CaCO3 in coastal dune sands here is more than 20%) ; And the other is that the layer of sand alternates frequently from wetting to drying cycles.According to the study, the coastal dune and dune-rock are formed at every stage during an eustasy so that the dune- rock can not be taken as a significant sign to the sea level changes,And the world wide distribution of dune-rock suggests that the correlation of dune-rock with definite climatic phases of the Holocene is not warranted.
%K dunerock
%K ridgerock
%K beachrock<br>沙丘岩
%K 沙堤岩
%K 海滩岩
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=869B153A4C6B5B85&jid=C0C75E88BA2EE501C8298896F64A711F&aid=6D5E958E08ADE1CB&yid=0702FE8EC3581E51&iid=0B39A22176CE99FB&journal_id=1000-0585&journal_name=地理研究&referenced_num=3&reference_num=0