桂林理工大学学报Issue(4)：606-614,9.DOI:10.3969/j.issn.1674-9057.2014.04.002
湖南联坑花岗闪长斑岩锆石 U－Pb年代学和 Hf同位素组成
Zircon U-Pb geochronology and Hf isotopic compositions of Liankeng granodiorite porphyry in southern Hunan
摘要
Abstract
The Liankeng molybdenum-copper porphyry deposit lies at southwest Shuikou town of Yanling County in Hunan.Granodiorite porphyry is located to the middla-east of the deposit and there are skarn-type Mo-Cu (W)deposit and quartz-vein type W-Mo deposits related to it.Zircon LA-ICP-MS U-Pb age for grano-diorite porphyry is (162.9 ±1.0)Ma(MSWD=0.024,n=18),which suggests an early Yanshanian emplace-ment.The insitu Hf isotope analysis reveals 176Lu/177Hf ratios from 0.001 217 to 0.003 544,and εHf(t)from-1 1.8 to-5.2 (peak value around-8.4),and the two stage Hf model ages(TDM2 )ranging from 1 538 Ma to 1 953 Ma (peak value around 1 760 Ma).Granodiorite porphyry in Liankeng may have the same diagenesis and mineralization background,with the mid-Jurassic porphyry-skarn-vein Cu polymetallic deposit and related to granites of Qin-Hang (Qinzhou bay to Hangzhou bay)metallogenic belt.To strengthen its relationship with re-gional metallogenic research on the latter is of great significance for further prospecting in the former area.关键词
锆石U-Pb年代学/Hf同位素/花岗闪长斑岩/联坑/湖南Key words
zircon U-Pb geochronology/Hf isotopic/granodiorite porphyry/Liankeng/Hunan分类
天文与地球科学引用本文复制引用
卢友月,付建明,谭仕敏,马丽艳,程顺波,张遵遵..湖南联坑花岗闪长斑岩锆石 U－Pb年代学和 Hf同位素组成[J].桂林理工大学学报,2014,(4):606-614,9.基金项目
中国地质调查局地质大调查项目 （）
