CAJ | 학술논문

西准噶尔博什库尔-成吉斯岩浆弧内谢米斯台山西缘沙尔布尔组出露一套安山岩-辉石安山岩组合，通过1∶5万区域地质调查对其中的辉石安山岩进行LA-ICP-MS锆石U-Pb测年，获得年龄为（428.7±2.7）Ma（n=17，MSWD=0.07，95%置信度）。据此确定该辉石安山岩形成于中志留温洛克世霍姆期，为沙尔布尔组年龄时限提供了科学依据，证实博什库尔-成吉斯岩浆弧的岛弧建造起始时间可能至少提前至中志留世，而非晚志留世。
서준갈이박십고이-성길사암장호내사미사태산서연사이포이조출로일투안산암-휘석안산암조합，통과1∶5만구역지질조사대기중적휘석안산암진행LA-ICP-MS고석U-Pb측년，획득년령위（428.7±2.7）Ma（n=17，MSWD=0.07，95%치신도）。거차학정해휘석안산암형성우중지류온락극세곽모기，위사이포이조년령시한제공료과학의거，증실박십고이-성길사암장호적도호건조기시시간가능지소제전지중지류세，이비만지류세。
The Shaerbuer Formation of the western part of Xiemisitai Mountains,northern West junggar located in the Boshchekul-Chingiz island arc,they composed of andesite and pyroxene andesite,LA-ICP-MS dating was used to deter-mine the zircons from pyroxene andesite by the 1:50000 regional geological survey and yielded zircon U-Pb age value of (428.7 ± 2.7)Ma (n=17,MSWD=0.07,95%confidence).It confirms the volcanic rocks belongs to the Wenlock Epoch of Middle Silurian and restricts the date of Shaerbuer formation scientifically,and conforms the magmatic arc construction of Boshchekul-Chingiz island arc advance to the Middle Silurian,rather than the Late Silurian previously.