山东国土资源2025，Vol.41Issue(6)：13-24,12.DOI:10.12128/j.issn.1672-6979.2025.06.003
栖霞西陡崖矿区侵入岩体锆石U-Pb年龄和氧同位素特征
Zircon U-Pb Ages and Oxygen Isotope Characteristics of Intrusive Rock Mass in Qixia-Xidouya Mining Area
摘要
Abstract
Qixia-Xidouya mining area is an important gold mining area within Qixia gold metallogenic belt in eastern Shandong province.Based on geological investigations,samples of intermediate-acidic to acidic intrusive rocks that are spatially closely related to gold mineralization within the mining area have been col-lected systematically,and zircon U-Pb dating and SHRIMP oxygen isotope analysis have been conducted.It is indicated that quartz diorite porphyry has a diagenetic age ranging from 155.2Ma to 153.9Ma,while the biotite monzogranite has a diagenetic age ranging from 159.7Ma to 155.7Ma.They both belong to Lin-glong granite sequence.The zircon δ18O values in the two types of intrusive rocks show a relatively small range,varying between 3.72‰ and 9.85‰(with an overall average of 7.11‰),and exhibiting the charac-teristics of high δ18O.The quartz diorite porphyry and biotite monzogranite have similar diagenetic ages and zircon oxygen isotope compositions.It is indicated that they represent a homologous magmatic evolu-tion relationship.The oxygen isotopes of zircons from neutral acidic intrusive rocks in Xidouya mining area of Qixia city show obvious crustal characteristics.it reflects the superposition of multiple geological processes,including crustal contamination,subduction zone fluid interaction,sediment recycling,cratonic mantle enrichment and regional metamorphism.关键词
金成矿岩体/锆石U-Pb年龄/SHRIMP氧同位素/栖霞西陡崖矿区Key words
Gold-bearing ore-forming rock mass/zircon U-Pb age/SHRIMP oxygen isotope/Qixia-Xidouya mining area分类
天文与地球科学引用本文复制引用
蔡娜,徐珺,李大鹏,张超,刘强,耿科,尉鹏飞,张岩,卞霄,李鑫..栖霞西陡崖矿区侵入岩体锆石U-Pb年龄和氧同位素特征[J].山东国土资源,2025,41(6):13-24,12.基金项目
国家自然科学基金项目:(4217021236) （4217021236）
国家重点研发计划:(2023YFC2906905) （2023YFC2906905）
山东省重点研发计划项目:(2023CXGC011001)、(2022CXPT047) （2023CXGC011001）
山东省地质勘查项目:鲁勘字[2022]9号、鲁勘字[2023]8号、鲁勘字[2024]14号联合资助 （）
