CAJ | 학술논문

根据秦-祁-昆造山带中北大河岩群、湟源岩群、化隆岩群、金水口岩群、陡岭岩群和秦岭岩群等副变质岩层碎屑锆石年龄谱资料,这些原定为古元古代的地层,至少包括测年样品在内的部分地层的时代应属中元古代或新元古代初期.研究资料还显示上述碎屑岩层具有大量中元古代早期的物源,而古元古代蚀源物质较匮乏.因此,上述副变质岩层显示出相近的碎屑锆石年龄谱特征.
근거진-기-곤조산대중북대하암군、황원암군、화륭암군、금수구암군、두령암군화진령암군등부변질암층쇄설고석년령보자료,저사원정위고원고대적지층,지소포괄측년양품재내적부분지층적시대응속중원고대혹신원고대초기.연구자료환현시상술쇄설암층구유대량중원고대조기적물원,이고원고대식원물질교궤핍.인차,상술부변질암층현시출상근적쇄설고석년령보특정.
According to the data of detrital zircon population the Beidahe, Hualong, Huangyuan, Jinshuikou, Douling and Qinling complex-groups, which are thought to be Palaeoproterozoic in age before, at least part of the strata including all selected samples should belong to the Late Mesoproterozoic or Early Neoproterozoic. The data also illustrate that the eroded area of the strata are characterized by developed Early Mesoproterozoic materials, but only less Palaeoproterozoic ones. So all involved samples show a similar feature of the detrital zircon population.