四川龙门山唐王寨地区泥盆纪生物礁

龙门山唐王寨地区泥盆纪生物礁是由缓坡丘礁、镶边台地边缘线状丘礁和开阔及局限台地内补丁礁构成的礁体群。造礁生物主要为各种生态的层孔虫和床板珊瑚。生物礁从早泥盆世甘溪晚期(相当于艾姆斯晚期)开始发育一直延续到晚泥盆世沙窝子期(相当于弗拉斯期),以发育时间早、延续时间长为特点。单个礁体规模小,高与宽之比一般小于1/30,呈透镜状和丘状。礁体群的发育和演化主要受古区域构造、沉积环境和古气候所控制。

DEVONIAN REEF IN TANGWANGZHAI REGION OF LONGMEN MOUNTAINS, SICHUAN

The Devonian reefs in Tangwangzhai Region are a series of reefs which consist of hummock reefs on carbonate ramp, linear hummock reefs on the rim of carbonate platform and patch reefs on carbonate platform that developed with the evolution of the carbonate platform. The reef-building organisms were mainly stromatoporoids and tabulate coral. They began to develop from the late Ganxi stage (late Emsian) till Shawozi stage(Famennian). They are characterized by small boddy size and lenticular or hummock in shape. The development and evolution of the reefs were controlled mainly by regional tectonics, sedimentary environments and paleoclamites.