海南岛全新世碳酸盐沉积及成岩作用

三亚湾珊瑚可以分为５个微相：生物骨架岩、生物屑、礁岩屑、珊瑚碎块，强烈改造的生物质，成岩作用包括同生沉积作用、胶结、藻缠结、细粒物充填，机械和化学侵蚀。排浦更新世白云岩与掘穴生物的钻孔有关，粉至中晶结构为混合水成因，峨曼更新世灰岩为砂质灰岩、角砾状灰岩，豆状灰岩。生物屑经重结晶，Ｘ（ＭｇＣＯ３）小于２％，贫铁，三亚湾潮间带海滩岩胶结物为文石和高镁方解石，见悬挂式胶结和渗滤砂。

SEDIMENTARY AND DIAGENESIS OF THE HOLOCENE CARBONATE IN HAINAN DAO

The coral reefs in Sanyawan can be divided into 5 microfacies: organic framework reef,bioclast,reef debris,coral detritus,and the strongly reformed bioclast. The dagenesis includes syndeposition, cementation, algal twine,fill of fine grains,mechanical and chemical eroson. The Holocene Paipu dolomite is associated wth the boreholes of the burrowing organsm and formed by mixed waters after ground to a mesocrystalline texture. The Holocene Eman limestone includes sandy limestone, brecciform limestone, and pisolitic limestone. The bioclasts are recrystallized, X(MgCO3) is less than 2% , and iron is poor. The beachrock cements in the intertidal zone of Sanyawan are aragonite and the high magnesiun calcite with hanging cements and infiltration sandstone.