摘要
白云金矿区煌斑岩和含金石英脉的产状受区域北西、北东向脆性破裂控制。煌斑岩为钾质-富钾质钙碱性煌斑岩,其稀土元素总量高,轻重稀土分馏强烈,大离子亲石元素为“Nb(Ta)-Ti”负异常型,过渡元素配分模式具有幔源岩石的“W”型。该岩石是大别碰撞造山带后碰撞拉伸背景下幔源岩浆活动的结果。
The occurrence of lamprophyric dikes and gold-bearing quartz veins in Baiyun gold district of Hubei are controlled by brittle faults striking northwestwards and northeastwards. The components of major elements show that the lamprophyres belong to alkaline series or potassic calc-alka-line series, they are enriched in REEs(especially LREEs), LILE and HFSE with MORB-normal-ized LILE distribution patterns being 'Nb(Ta)-Ti' negative anomaly type and primary mantle-normalized distribution patterns of the transition elements being 'W' type, which suggests that the lamprophyres were derived from the mantle during the extensional setting after collision which resulted the formation of the Dabie orogenic belt.
出处
《华南地质与矿产》
CAS
1998年第2期9-15,共7页
Geology and Mineral Resources of South China
基金
地质矿产部定向研究基金项目"桐柏-大别地区剪切带阵列及其与金矿成矿关系"的部分成果
