摘要
豫西东秦岭造山带核部杂岩的变质作用研究取得了若干重要进展,包括:(1)据同位素年龄将其划分为晋宁变质旋回和加里东一海西变质旋口;(2)按显微结构分析划分矿物的生长历史为二期六个阶段;(3)厘定了若干降压变质反应和等压冷却反应;(4)较为定量地重建了两大旋回的变质作用P—T－t轨迹.上述成果为核部杂岩,乃至整个造山带的地壳演化提供了新的证据.
Some significant progresses have been made in metamorphism research on the core complex of eastern Qinling orogenic belt, western Henan. In this research, the metamorphic evolution is distinguished as Jinning and Caledonian-Hercynian two cycles according to isotopic dating and the mineral growth is divided into two periods and six stages. In addiiton, a number of decompression and isobaric cooling reactions are found, and the metamorphic p-T-t paths arc quantitatively reconstructed for the two cycles. These results lend the new evidence for the evolution of the core complex and the whale orogenic belt crust.
出处
《地质科技情报》
CAS
CSCD
北大核心
1990年第3期20-24,共5页
Geological Science and Technology Information
