Geochronology of Ailaoshan-Jinshajiang alkali- rich intrusive rocks and their Sr and Nd isotopic cha

• 作 者: 张玉泉 谢应雯
• 机 构: GuangzhouInstituteofGeochemistry,ChineseAcademyofSciences,Guangzhou510640,China,China
• 出 处: Science in China(Series D:Earth Sciences)
• 发表日期: 1997年5期
• 关键词: intrusive isotopic alkali mantle volcanic enriched magmatic rock melting zircon

Twenty-nine isotopic ages, ranging from 41 to 27 Ma, are presented for the alkali-rich intrusive rocks and their coexisting alkaline volcanic rocks, lamprophyres and acidic porphyries, indicating that they are Tertiary in age. The alkali-rich intrusive ro