Rare Earth and Trace Element Patterns in Bedded-cherts from the Bottom of the Lower Cambrian in the Northern Tarim Basin, Northwest China: Implication for Depositional Environments

• 塔里木盆地肖尔布拉克剖面下寒武统底部硅质岩微量元素和稀土元素地球化学及其沉积背景