九-黄景区钙华碳氮磷沉积特征

Sedimentary characteristics of elements-carbon,nitrogen and phosphorus in travertine in Jiu-Huang Scenic Area

通过对九-黄景区钙华的表观特征进行描述分类,结合对钙华试样的XRD、XRF分析以及碳氮磷元素特征分析,重点阐述了钙华的表观特征与钙华组分之间的关系,结果表明:生物参与钙华沉积的程度越高,钙华的生物痕迹则越明显,颜色也越深;同时,在相同的采样地点,生物参与钙华沉积程度的高低可用钙华氮磷质量分数表示,生物参与钙华沉积的程度越高,钙华的氮磷质量分数则越高。试样的XRD和XRF分析结果表明,钙华的矿物相均为方解石相,生物参与钙华沉积的程度越低,钙华的CaO质量分数则越高,最高可达55.81%。

The description of the apparent characteristics of travertine in Jiu-Huang Scenic Area was classified in conjunction with XRD and XRF analysis of travertine samples to have elements-carbon,nitrogen and phosphorus cha-racterized in travertine.It focused on the relationship between the apparent characteristics and the components of tra-vertine.The results indicated that the higher degree of biological involvement in travertine deposition,the clearer the biological traces was found in travertine with the darken process,meanwhile,the degree of biological involvement in travertine deposition in the same place for sampling can be represented with the content of nitrogen and phosphorus in travertine.The higher nitrogen and phosphorus content demonstrated the higher degree of biological involvement in travertine deposition.The results from XRD and XRF analysis of the sample show that the mineral composition of travertine was limited to calcite.The lower degree of biological involvement in travertine deposition results in higher CaO content even up to 55.81%.