陕西秦岭海槽晚石炭世三里峡生物礁群落相研究

A Study on the Community Facies of the Late Carboniferous San Lixia Bioherm in Qinling Geosyncline, Shaanxi

通过对发育于陕西秦岭海槽晚石炭世三里峡生物礁的生长过程、古生态特征及其造礁作用的研究，鉴定出６个门类的２３个属，主要为有孔虫、藻类、腕足类及介形类等。它们组成２个造礁群落，并形成独立的群落结构。该生物礁的造礁功能比较复杂，在礁的不同生长阶段有不同的造礁作用方式，具有以一种造礁作用为主兼有多种造礁作用共同作用的特点。其生长可分为生物定殖。

This paper discusses in detail the growth process,palaeoecological features and the function of organisms in reef building of the San Lixia reef in Shaanxi. Organisms are relatively monotonous in the reef, 23 genera belonging to 6 phyla have been recognized.They consist mainly of Foraminifera , Algae, Brachiopoda and Ostracoda etc., and form 2 communities. Each community has its own salient ecological features. Analysis of all communities shows that the organic functions are very complex. There are different reef building actions at every reef building stage. The growth process of the reef may involve 3 stages: stabilization stage, baffle reef stage and bind cover reef stage.