福建深沪湾晚更新世古牡蛎滩的发育与留存古环境
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摘要
福建深沪湾晚更新世古牡蛎滩以牡蛎原生、分布面积大 ,年龄主要在25800±2490aB P～15460±420aB P之间为其主要特征 ,在牡蛎生长期间 ,深沪湾地壳抬升速率与水动型海平面上升速率相当 ,深沪湾海水深度稳定 ,海岸环境稳定 ,古牡蛎繁盛生长 ,其后深沪湾地壳抬升成陆 ,古牡蛎滩脱离海水成为牡蛎滩台地 ,距今7000a和距今2000a的两次强古地震 ,使古牡蛎滩快速下沉到潮下带和潮间带海底 ,这是深沪湾晚更新世古牡蛎滩能留存到今天的重要原因。
The late Pleistocene palaeo oyster shell beach has the feathers that the oyster originally grew, the distribution of the oyster shells is vast and the age of the oyster shells mainly dated from 25 800±2 490～15 460±420 aB.P. The ascend rate of the crust balanced that of "Eustatic" sea level in the Shehuwan Bay, the depth of the sea water and the seacoast environment were stable and the palaeo oyster shell grew prosperously then and there. After that, the crust of Shenhuwan uplifted to become a continent, the palaeo oyster shell beach separated from the sea water and became an oyster shell platform. The two preat palaeo earthquakes occurred in Shenhuwan in 7 000 aB.P and 2 000 aB.P and made the palaeo oyster beach sink in the lands under tide and the bottom of the tidelands. This is the important reason why the late pleistocene beach can remain in Shenhuwan Bay today.
The late Pleistocene palaeo oyster shell beach has the feathers that the oyster originally grew, the distribution of the oyster shells is vast and the age of the oyster shells mainly dated from 25 800±2 490～15 460±420 aB.P. The ascend rate of the crust balanced that of "Eustatic" sea level in the Shehuwan Bay, the depth of the sea water and the seacoast environment were stable and the palaeo oyster shell grew prosperously then and there. After that, the crust of Shenhuwan uplifted to become a continent, the palaeo oyster shell beach separated from the sea water and became an oyster shell platform. The two preat palaeo earthquakes occurred in Shenhuwan in 7 000 aB.P and 2 000 aB.P and made the palaeo oyster beach sink in the lands under tide and the bottom of the tidelands. This is the important reason why the late pleistocene beach can remain in Shenhuwan Bay today.
引文
牡蛎种属承中国科学院南海海洋研究所谢玉坎研究员鉴定。
徐起浩、冯炎基。导致古森林沉没于海的福建深沪湾古地震研究,地震地质,2001,23(3)待刊。
徐起浩、冯炎基。福建沿海深沪湾地区晚更新世中晚期以来的地壳运动,地震地质,2001,23(4)待刊。
1邵合道、吴根耀。福建中南部全新世的森林牡蛎礁遗迹,第四纪研究,2000,20(3):299
2俞鸣同、王绍鸿、赵希清。福建深沪湾牡蛎礁的测量与研究新进展,第四纪研究,2000,20(6):568
3徐起浩。深沪湾新发现的海底古森林遗迹分布及植物学、年代学特征,海洋科学,2001,25(2):46～49
4徐起浩、冯炎基。深沪湾古森林沉没海底前生长的古凹陷环境,南京师范大学学报(应用第四纪专集),2000,23(4):164～169
徐起浩、冯炎基。导致古森林沉没于海的福建深沪湾古地震研究,地震地质,2001,23(3)待刊。
徐起浩、冯炎基。福建沿海深沪湾地区晚更新世中晚期以来的地壳运动,地震地质,2001,23(4)待刊。
1邵合道、吴根耀。福建中南部全新世的森林牡蛎礁遗迹,第四纪研究,2000,20(3):299
2俞鸣同、王绍鸿、赵希清。福建深沪湾牡蛎礁的测量与研究新进展,第四纪研究,2000,20(6):568
3徐起浩。深沪湾新发现的海底古森林遗迹分布及植物学、年代学特征,海洋科学,2001,25(2):46～49
4徐起浩、冯炎基。深沪湾古森林沉没海底前生长的古凹陷环境,南京师范大学学报(应用第四纪专集),2000,23(4):164～169
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