黄龙争艳彩池边石坝藻席钙华特性研究及意义

藻席钙华对彩池边坝的颜色及钙华的沉积具有调控作用，会影响彩池边壁稳定性，导致独特景观破坏。文章选取黄龙争艳彩池作为研究对象，通过对藻席钙华的基本理化特征和微观形貌观察与分析，明确藻席钙华的沉积特性。结果表明:藻席钙华含水率为5.70 %，密度为1.56 g.cm-3，具有较强吸水能力；通过XRD确定其主要矿物相为方解石；利用元素分析仪确定总碳含量为12.06 %，在生物作用下，受次生有机碳影响较大；藻席钙华的微观形貌显示，硅藻与钙华颗粒是构成藻席钙华的基本单元，是一个复合型生物集合体。 

Study on characteristics and significances of algal mats travertine in Zhengyancai pool marble dam of Huanglong natural reserve

Algal mats travertine has a regulating effect on the color and deposition of travertine of Zhengyancai pool marble dam，which affects the stability of rimstone dam，leading to the destruction of the unique landscape.Therefore， it is of great importances to analyse the algal mats travertine.In this paper， Zhengyancai pool was selected as the study site，the deposition of travertine and morphological characteristics were defined through the analysis of basic physicochemical characteristics and micro-morphology of algal mats travertine.The results showed that，（1） the water content and density of algal mats travertine were 5.70% and 1.56 g.cm-3，respectively，indicating strong water absorption capacity；（2）The main mineral phase was calcite determined by X-ray diffraction spectrometer； （3）Chemical components analysis of algal mats travertine showed that the total carbon was 12.60% by elemental analyzer， indicating that the algal mats travertine were greatly affected by the secondary organic carbon under the biological action.（4）The surface micro-morphology showed that diatom and travertine particles were basic units of algal mats travertine， which is a complex biological collection.