CAJ | 학술논문

本文收集大量锆石U-Pb年代学数据，通过制作年龄-频数图谱，简略探讨了西伯利亚克拉通、华北克拉通、东北地区微地块以及内蒙古大石寨地区的演化史，并对大石寨二叠系与其周边块体的锆石年龄作比较分析，进而探讨了大石寨地区二叠系的物源问题。碎屑锆石年龄-频数图表明，大石寨地区二叠系碎屑锆石年龄可以划分出古生代年龄段（500~250 Ma），中-新元古代年龄段（1.6~0.8 Ga），新太古-古元古代年龄段（2.6~1.7 Ga）。华北克拉通北缘与西伯利亚克拉通南缘基底年龄均＞1.6 Ga，其二者都不能反映大石寨地区二叠系物源年龄信息，而大石寨地区二叠系碎屑锆石年龄峰值与东北地区地块年龄峰具有很好一致性，说明二者锆石年龄峰值反映的构造岩浆事件一致，表明大石寨地区二叠系物源应来源于东北地块而不是华北克拉通和西伯利亚克拉通。同时，东北地区大量古老基底锆石年龄数据的存在，暗示东北地块可能独立于上述两大板块而存在，并响应中亚造山带内存在古老微大陆的观点；东北地块由诸多微小块体拼贴而成，并分别与西伯利亚克拉通和华北克拉通碰撞拼接，缝合线分别是贺根山-黑河缝合带与西拉木伦缝合带。
본문수집대량고석U-Pb년대학수거，통과제작년령-빈수도보，간략탐토료서백리아극랍통、화북극랍통、동북지구미지괴이급내몽고대석채지구적연화사，병대대석채이첩계여기주변괴체적고석년령작비교분석，진이탐토료대석채지구이첩계적물원문제。쇄설고석년령-빈수도표명，대석채지구이첩계쇄설고석년령가이화분출고생대년령단（500~250 Ma），중-신원고대년령단（1.6~0.8 Ga），신태고-고원고대년령단（2.6~1.7 Ga）。화북극랍통북연여서백리아극랍통남연기저년령균＞1.6 Ga，기이자도불능반영대석채지구이첩계물원년령신식，이대석채지구이첩계쇄설고석년령봉치여동북지구지괴년령봉구유흔호일치성，설명이자고석년령봉치반영적구조암장사건일치，표명대석채지구이첩계물원응래원우동북지괴이불시화북극랍통화서백리아극랍통。동시，동북지구대량고로기저고석년령수거적존재，암시동북지괴가능독립우상술량대판괴이존재，병향응중아조산대내존재고로미대륙적관점；동북지괴유제다미소괴체병첩이성，병분별여서백리아극랍통화화북극랍통팽당병접，봉합선분별시하근산-흑하봉합대여서랍목륜봉합대。
The authors collected a large number of data about U-Pb ages of zircons through compling the relative probability plot of detrital zircons, briefly discussed the evolution history of the Siberia craton, North China craton, Northeast China micro-block and Dashizhai area of Inner Mongolia. The comparative analysis of ages for the Permian strata in Dashizhai area of Inner Mongolia and the neighboring old blocks can help to study the problem of the source of Permian strata in Dashizhai area of Inner Mongolia. Based on the ages of detrital zircons from the South Siberia craton, North China craton, Northeast China micro-block and the Permian strata in Dashizai area in comparison with zircon ages of blocks in neighboring areas, the authors discussed the provenance and made research on zircons U-Pb chronology. The source of the Permian strata in Dashizhai area of Inner Mongolia was reasonably determined. The study of the ages of detrital zircons shows that detrital zircon ages of Permian strata in Dashizai area of Inner Mongolia can be divided into the Paleozoic age group (500-250 Ma), the central and late Proterozoic age group (1.6-0.8 Ga) and the late Archean age group (2.6-1.7 Ga ), whereas on the northern margin of North China craton and on the southern margin of Siberian craton, zircon U-Pb ages are earlier than 1.6Ga. Both of them fail to reflect the reasonable age information of the Permian strata source in Dashizhai area of Inner Mongolia. The age peaks of the Northeast China micro-block in China are consistent with the age peaks of the Permian strata from Dashizai area, which indicates that the provenance of the Permian strata came from the Northeast China block rather than the northern margin of North China craton and the southern margin of Siberian craton. Large quantities of ages of zircons from old basements indicate the existence of ancient micro-continents in Northeast China that may be independent of Siberia craton and North China craton, which is consistent with the view that there existed an ancient micro-continent in the central Asian orogenic belt. Northeast China block might have consisted of many small blocks after collision, and it then collided with the Siberia craton and the North China craton, with the collision taking place respectively along the Hegenshan-Heihe suture zone and Silas Mulun suture zone.