摘要
全岩Sm-Nd、Rb-Sr和单晶锆石^(207)Pb-^(206)Pb年代学的综合研究表明,豫西东秦岭造山带核部杂岩中的变质地层(秦岭群)大约在1200Ma形成;核部杂岩经历了晋宁旋回和加里东-海西旋回两个巨热旋回的影响与再造,目前划定的秦岭群仍有解体的可能性。
The comprehensive results of whole-rock Sm-Nd and Rb-Sr and single grain zircon Pb-Pb dating suggest that the Qinling Group in the Qinling erogenic belt, northwestern Henan was formed at about 1200 Ma. The complex rocks in the interior of the erogenic belt experienced strong reworking in response to two great thermal cycles-the Jinning and the Caledonian cycles. Further disintegration of the Qinling Group delineated at present seems highly possible.
出处
《地球化学》
CAS
CSCD
北大核心
1991年第3期219-228,共10页
Geochimica
基金
地矿部"七五"重点攻关秦巴项目四级课题"秦岭群变质变形史及古构造模式"的成果之一
