摘要
在贵州台江八郎凯里组中、下寒武统界线层型候选剖面上,对中、下寒武统界线剖面沉积岩地球化学特征进行了研究,发现沉积岩中的微量元素含量和稀土元素分布模式沿剖面的变化均具规律性,元素反映的沉积环境也具类似特点。剖面微量元素及稀土元素地球化学特征在界线剖面12～13层之间变化明显,突变点主要分布在这两层样品中。因此,将八郎界线剖面上中、下寒武统界线置于剖面12～13层之间。
Geochemical characteristics of sed imentary rocks on the stratotype can didate boundary section of the Middle-Lower Cambrian in Taijiang,Guizhou have been studied.The resul ts show that variations of trace elem ent contents and REE distribution patte rns along the section have similar re gular characteristics,and the sedi mentary environment reconstructed by these elements has similar features.Bed 12and Bed 13have obviously different geochemical variations of trace and rare earth elements.It is concluded that the boundary of the Lower-Middl e Cambrian is located between Bed 12an d Bed 13on the section.
出处
《地球化学》
CAS
CSCD
北大核心
2001年第4期383-389,共7页
Geochimica
基金
国家自然科学基金(4007204749772085)
中国科学院"西部之光"人才培养计划资助项目
