山东理工大学学报（自然科学版）2024，Vol.38Issue(4)：14-19,6.
鲁西徂徕山南部花岗闪长斑岩地球化学特征及构造意义
Geochemical characteristics and tectonic significance of granodioritic porphyry in southern Culaishan of western Shandong Province
摘要
Abstract
In order to constrain the magmatic source of Mesozoic intrusive rocks and lithosphere thinning time in western Shandong Province and provide geodynamic background data,the petrographic and geo-chemical study of Mesozoic granodioritic porphyry in southern Culaishan area of western Shandong Prov-ince was carried out based on the published U-Pb chronology.The genesis,nature of source area and tectonic environment of the rock were discussed.The results showed that the porphyry has high silicon,alkali and aluminum content,enrichment in light rare earth elements and large ion lithophile elements such as Rb,Ba and Sr,depletion in heavy rare earth and high field strength elements such as Nb,P and Ti,and a weak Eu negative anomaly.It belongs to weak peraluminous high potassium calc-alkaline series S-type granite,originates from the partial melting of the ancient crust of North China Craton in the late Neoarchean.The zircon LA-ICP-MS U-Pb age of granodioritic porphyry was 127±1.2 Ma.Combined with regional tectonic evolution background,the granodioritic porphyry was inferred to be formed in the extensional environment of paleo-Pacific plate subduction to Eurasia continent,and was a geological re-sponse to the lithosphere thinning and destruction of North China Craton during the Early Cretaceous in the Culai Mountains area of western Shandong Province.关键词
稀土元素/地球化学/花岗闪长斑岩/徂徕山Key words
rare earth elements/geochemistry/granodiorite porphyry/culaishan分类
天文与地球科学引用本文复制引用
刘伟,靳立杰,阎海青,王刚,江振国,杨帆..鲁西徂徕山南部花岗闪长斑岩地球化学特征及构造意义[J].山东理工大学学报（自然科学版）,2024,38(4):14-19,6.基金项目
山东省自然资源厅基金项目(SDZS-2015-GTT01) （SDZS-2015-GTT01）
