海南岛鹿回头造礁珊瑚的^(14)C年代及珊瑚礁的发育演化

The ^(14)C Ages and Evolvement of Coral Reef in Luhuitou Peninsula, Hainan Island

通过 2002 年 7 月沿鹿回头珊瑚礁坪断面方向,在原生滨珊瑚 (Porites) 礁表面进行系统采样,并进行 C 测年和年代校正,初步划分出全新世以来珊瑚礁演化的 5 个阶段:珊瑚礁繁盛期 (7 300—6 000 14cal.aBP )、珊瑚礁发育停滞期Ⅰ(6 000—4 800 cal.aBP )、珊瑚礁发展期 (4 800—3000 cal.aBP )、珊瑚礁发育停滞期Ⅱ(3 000—1000 cal.aBP ) 和现代珊瑚礁发育期 (1 000 cal.aBP 以来)。鹿回头珊瑚礁在 7 300—6 000cal.aBP 处于发育的繁盛期,已基本上形成了现代珊瑚礁的地貌格局。后来不同时期珊瑚礁是在此时期形成的礁塘或礁坑等低洼地中形成,并在鹿回头半岛两侧向外发展,现代珊瑚礁则发育于全新世珊瑚礁的外礁坪或礁前斜坡带。

According to the14C ages and calibrated ages of original coral reef sampled in the Luhuitou Peninsula along the way of reef plat sections in July, 2002 by authors, the evolvement of coral reef has been identified in 5 stages at least since Holocene:the stage of blooming(7 300- 6 000 cal.aBP), the stage of stagnation I (6 000-4 800 cal.aBP), the stage of development (4 800- 3 000 cal.aBP), the stage of stagnation Ⅱ(3 000-1 000 cal.aBP), and the stage of evolvement of modern coral reef (1 000 cal.aBP. The coral reef was blooming from 7 300 cal.aBP to 6 000 cal.aBP, and the geomorphological structure was formed basically. The subsequent coral reef was formed in the reef-pond and depression formed during the former period, and developed outward along the two flanks in the Luhuitou Peninsula. The modern coral reef develops at the outer reef or the reef front slope.