文山古木街台地边缘泥盆纪斜坡碳酸盐沉积与环境意义

THE DEVONIAN SLOPE CARBONATE SEDIMENTS AT THE EDGE OF THE GUMUJIE PLATFORM, WENSHAN, AND THEIR SIGNIFICANCES

文山古木街台地东部边缘泥盆纪的斜坡碳酸盐沉积类型包括重力流和非重力流 ,重力流有碎屑流、滑移滑积层及浊流 ;常见的层序组合有 3种 ,整个斜坡体系在垂向上可划分 3个沉积旋回 ;建立 11个浮游生物化石带 ,沉积时代为早泥盆世晚期至中泥盆世早期。斜坡碳酸盐重力流的研究具有重要的古地理、古构造环境意义。

The Devonian slope carbonate sediments located eastern edge of the Gumujie Platform, Wenshan of Yunnan Province, comprise the gravity current and the nongravity current. The gravity current includes the clastic current,the gliding sliding sediment layer and the turbidity current. The whole slope system may be divided vertically into three sedimentary cycles. Eleven plankton zones of late Early Devonian to early Middle Devonian are set up. Studies of the slope carbonate gravity current are of important significance in the studies of paleogeography and paleotectonic environment.