摘要
良村花岗岩体出露于赣南兴国县良村镇,为兴国地区燕山早期第一阶段首次岩浆活动的产物,显示同构造花岗岩的产出特征。岩石类型以黑云母花岗岩为主,二云母花岗岩、花岗闪长岩次之,均为过铝质-强过铝质,轻稀土元素富集明显,属壳源物质低程度部分熔融所成的S型花岗岩或壳源重熔型花岗岩。4个岩石样品的锆石LA-ICP-MS测年结果显示,该花岗岩体侵位于147~158 Ma,属晚侏罗世,并且至少经历了10 Ma的结晶-成岩史。
The Liangcun granites outcrop within Liangcun town, Xingguo county, in the south of Jiangxi province. The Liangcun granites are product of the PhaseⅠmagmatism of the Early Yanshanian, displaying characteristics of syn-tectonic granite. The batholith consists mainly of biotite-granite which is intruded by the latter stages of dimicaceous-granite and granodiorite. The Liangcun granites are peraluminous to strongly peraluminous, and show LREE enriched patterns. The Liangcun granites are“S-type”or crustal remelting granite derived from low degree partial melting of crustal materials. The LA-ICP-MS zircon U-Pb dating results of 4 granite samples indicate that the Liangcun granites were emplaced at 158 to 147 Ma, i.e., the Late Jurassic. The cooling and crystallization of the Liangcun granites may have lasted^10 Ma as suggested by the isotopic ages.
出处
《大地构造与成矿学》
EI
CAS
CSCD
北大核心
2014年第2期347-358,共12页
Geotectonica et Metallogenia
基金
中国地质大调查项目“我国重要矿产和区域成矿规律研究”(编号:1212010633903)和“南岭地区岩浆岩成矿专属性研究”(编号:1212011120989)资助
