Title

吉林红旗岭铜镍硫化物矿床的成矿时代讨论

Translated Titles

Discussion on Metallogenic Epoch of Hongqiling Cu-Ni Sulfide Deposit, Jilin Province

Authors

郗爱华(Ai-Hua Xi);顾连兴(Lian-Xing Gu);李绪俊(Xu-Jun Li);叶松青(Song-Qing Ye);郑远川(Yuan-Chuan Zheng)

Key Words

地球化学 ; 成矿年龄 ; 印支期 ; 铜镍硫化物矿床 ; 红旗岭 ; 吉林 ; geochemistry ; ore-forming age ; Indosinian orogeny ; Cu-Ni sulfide deposit ; Hongqiling ; Jilin Province

PublicationName

礦床地質

Volume or Term/Year and Month of Publication

24卷5期(2005 / 10 / 01)

Page #

521 - 526

Content Language

簡體中文

Chinese Abstract

通过对红旗岭铜镍硫化物矿床1号含矿超镁铁质岩体和8号不含矿镁铁-超镁铁质岩体进行单矿物40Ar-39Ar法测年,得到与铜镍硫化物矿床相关的角闪石与黑云母结晶年龄分别为250 Ma和225 Ma,这一结果与前人所报道的K-Ar法年龄有明显的差异。结合与热液矿化相关的斜长伟晶岩锆石SHRIMP法年龄216 Ma,认为镁铁-超镁铁质岩形成于250 Ma左右的印支早期,铜镍硫化物矿床的形成时间晚于含矿岩体,大约为225 Ma前后的印支中期。216 Ma前后的岩浆期后热液叠加对成矿具有积极作用。

English Abstract

40Ar-39Ar isotope dating of No. 1 ore-bearing intrusion and No. 8 barren intrusion in Hongqiling area indicates that mafic-ultramafic intrusions associated with Cu-Ni sulfide deposits were formed at 250 Ma. This conclusion is different from the K-Ar age reported by previous researchers. In combination with a zircon Pb-U SHRIMP age of (216±5) Ma for anorthositic pegrnatite associated with hydrothermal mineralization, it is concluded that the mafic-ultramafic intrusions were solidified at 250 Ma in company with the early Indosinian orogeny, that the main mineralization took place at 225 Ma, and that hydrothermal superimposition at 216 Ma played an active role in the formation of the Cu-Ni sulfide deposit.

Topic Category 基礎與應用科學 > 地球科學與地質學