次生富集 meaning in English

downward enrichment
secondary enrichment
secondaryenrichment

This paper sums up characteristics of au anomalies within tertiary red elastic beds in a certain area of qinghai province , and points out that au anomalies mainly exist in the middle part of the tertiary strata , that anomalies are most strong in stream sediments , and that au anomalies result from secondary enrichment of au
摘要对青海某地第三系红色碎屑岩层中的金异常特徵进行了综述，指出金异常主要存在于第三系中段岩层中，异常在水系沈积物中强度最大，并认为金异常由次生富集作用形成。
Abstract : this paper sums up characteristics of au anomalies within tertiary red clastic beds in a certain area of qinghai province , and points out that au anomalies mainly exist in the middle part of the tertiary strata , that anomalies are most strong in stream sediments , and that au anomalies result from secondary enrichment of au
文摘:对青海某地第三系红色碎屑岩层中的金异常特征进行了综述，指出金异常主要存在于第三系中段岩层中，异常在水系沉积物中强度最大，并认为金异常由次生富集作用形成。