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用粗粒(90—125μm)石英热释光技术对深圳大鹏湾沿岸沙堤和沙丘的10个砂样作年龄测定。初步结果表明,各小湾外缘白色拦湾沙堤形成于中全新世,约4.5ka—7.5ka B.P.;白色沙堤后侧和下伏的黄棕色老沙堤形成于晚更新世,约30ka—40ka B.P.;大鹏半岛南端西冲湾的沙丘形成于晚全新世,约1.5ka—2.7ka B.P.,沙丘后侧古潟湖前缘的洁白色石英砂层形成于60ka—70ka B.P.这些沙堤和沙丘除受波浪作用外,主要是风积成因的,其高程与海平面升降变化可能无大关系。
Ten sand samples from sand banks and sand dunes along the coast of Dapeng Bay in Shenzhen were measured by means of coarse grained (90-125μm) quartz thermoluminescence. The preliminary results show that the sand barb of the Bay Barrier at the outer edge of each bay is formed in the middle Holocene, about 4.5ka-7.5ka BP. The back of the white sand bar and the underlying yellow-brown sand bank formed in the late Pleistocene, about 30ka -40ka BP. Dune at Xipeng Bay at the southern tip of Dapeng Peninsula was formed in the late Holocene, about 1.5ka-2.7ka BP. The white quartz sand formed at the front of the ancient lagoon at the back of dune was formed between 60ka and 70ka BP. In addition to the dune by the waves, the dune is mainly aeolian origin, and its elevation may not have much to do with the sea level change.