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首次利用锆石LA-ICP-MSU-Pb法定年,发现甘肃北山营毛沱地区火石山西北处原中上志留统公婆泉群中有结晶年龄为早石炭世((333.1±9.8)Ma)的玄武岩,同时发现公婆泉群中存在晚泥盆世物质的信息(继承性锆石年龄(358±17)Ma),结合北山各地段公婆泉群中志留纪化石部分可延至泥盆-石炭纪,认为公婆泉群形成时代可能从志留纪跨越至早石炭世,进而表明塔里木板块与哈萨克斯坦板块的俯冲效应可能延续到早石炭世。
The dating of LA-ICP-MSU-Pb zircon was the first time that the age of Early Proterozoic was (333.1 ± 9.8) Ma in the Upper Proterozoic Shangquanquan Group in the northwest of Huosuo Mountain in Beishanying, Gansu Province. (358 ± 17 Ma) of the Late Devonian in Gongpquanquan Group, and the part of the Middle Silurian fossil from Gongpquan Group in Beishan can be extended to Devonian-Carboniferous Ji, that the formation of the in-law Quanquan group may span from Silurian to Early Carboniferous, further demonstrating that the subduction effect of the Tarim plate and the Kazakhstan plate may extend to the early Carboniferous.