陕南汉中地区新元古代岩浆岩U-Pb年代学

收稿日期: 2005-06-27

修回日期: 2005-10-31

刊出日期: 2006-03-15

U-Pb geochronology of Neoproterozoic magmatic rocks in Hanzhong, southern Shaanxi, China

Received Date: 27 June 2005

Revised Date: 31 October 2005

Publish Date: 15 March 2006

摘要: 用单颗粒锆石U-Pb稀释法测定了扬子地块北缘汉南地区新元古代岩浆岩的年龄，获得孙家河组火山岩成岩年龄为840-820Ma，汉南侵入杂岩中五堵门复式花岗岩体中英云闪长岩的结晶年龄为764Ma＋2Ma，黄家营复式岩体中钾长花岗岩的结晶年龄为778Ma＋5Ma，表明扬子地块北缘汉南地区岩浆岩分别形成于新元古代晋宁期和澄江期。结合这些岩浆岩的地质和地球化学特点，认为其成因可能与华南新元古代裂解事件有关。
- 陕南汉中地区孙家河组汉南侵入杂岩单颗粒锆石U-Pb测年新元古代
- Hanzhong, southern Shaanxi; Sunjiahe Formation; Hannah intrusive complex; single-zircon U-Pb dating; Neoproterozoic