CAJ | 학술논문

阿尔金山新生代隆升历史一直倍受关注，大量热年代学数据显示，渐新世（40～30 Ma）以来发生阶段性隆升，而新生代初期隆升的热年代学记录极少。柴达木盆地西北地区（柴西北地区）新生界碎屑锆石裂变径迹年龄研究表明，其物源区单一且在新生代早期古新世中晚始新世（65～50 Ma）发生快速隆升剥露，为该区提供陆源碎屑。前人通过物源分析发现，柴西北时期的碎屑物主要来源于阿尔金山。同时，该区路乐河组下干柴沟组沉积地层残余厚度及沉积相特征表明，此时（65～50 Ma）阿尔金山存在一次短暂抬升，但幅度较小，与盆地高差不大，使柴西地区地形东高西低、北高南低。结合前人研究成果，本研究锆石裂变径迹热年代学数据以及沉积学指标所记录的阿尔金山东段65～50 Ma 构造隆升事件，是对新生代印度欧亚板块碰撞的最初响应，也为青藏高原新生代隆升具有南北同步性提供了新的证据。
아이금산신생대륭승역사일직배수관주，대량열년대학수거현시，점신세（40～30 Ma）이래발생계단성륭승，이신생대초기륭승적열년대학기록겁소。시체목분지서북지구（시서북지구）신생계쇄설고석렬변경적년령연구표명，기물원구단일차재신생대조기고신세중만시신세（65～50 Ma）발생쾌속륭승박로，위해구제공륙원쇄설。전인통과물원분석발현，시서북시기적쇄설물주요래원우아이금산。동시，해구로악하조하간시구조침적지층잔여후도급침적상특정표명，차시（65～50 Ma）아이금산존재일차단잠태승，단폭도교소，여분지고차불대，사시서지구지형동고서저、북고남저。결합전인연구성과，본연구고석렬변경적열년대학수거이급침적학지표소기록적아이금산동단65～50 Ma 구조륭승사건，시대신생대인도구아판괴팽당적최초향응，야위청장고원신생대륭승구유남북동보성제공료신적증거。
The Cenozoic uplift of Altyn Mountains has been closely concerned .A large number of thermochronology dates show that Altyn Mountains have periodically uplifted since Late Eocene (40 30 Ma) .However ,the thermochronology records of the early Cenozoic uplift of Altyn Mountains are rarely documented .The Cenozoic detrital zircon fission track age in the northwestern Qaidam basin shows that the detrital zircons came from the same source which did rapid uplift and exposed to the air in Early Cenozoic Paleocene‐Middle Eocene(65 50 Ma) ,and provided the terrene clast .The previously reported analysis results suggested that the source of the western Qaidam basin were from Altyn Mountains .In consideration of the residual thickness of the sedimentary strata and sedimentary facies of Lulehe Xiaganchaigou Formations in the western Qaidam basin , a brief and small‐scale uplift of Altyn Mountains occurred in Early Cenozoic ; which resulted in the small elevation difference between the mountains and the basin .Under the influence of the uplift ,Qaidam terrain is high at southeast and low at northwest .The uplift represents the response of Altyn Mountains to the initial stage of collision between India and Eurasian plates . The zircon fission track thermal chronology data recorded the tectonic events of the middle‐east part of Altyn Mountains in 65 50 Ma ,which indicates the Cenozoic synchronicity uplifts of Tibetan plateau throughout south to north .