摘要
通过对特瑞艾肯组冰碛岩顶部含砾粉砂岩的碎屑锆石年代学分析,得到最年轻锆石的年龄为629±8Ma,代表特瑞爱肯冰碛岩的沉积时代上限。该年龄限定了特瑞爱肯冰期的结束时代,并可与扬子板块的南沱冰期以及全球范围的Elatina冰期或Marinoan冰期对比。其余较老年龄集中分布在718～887 Ma,1822～2092 Ma和2345～2613 Ma,暗示库鲁克塔格地区前寒武纪的3个主要岩浆活动时期。
U-Pb dating of detrital zircons from the pebbly siltstone at the top of the Tereeken Formation yielded the youngest zircon ages of 629±8 Ma, representing the maximum depositional age of the Tereekan glaciation. This result indicates that the Tereeken glaciation might be correlated with the Nantuo glaciation in the Yangtze Platform and the global Elatina or Marinoan glaciation. The remaining older zircons fall into three age-groups： 718-887 Ma, 1822-2092 Ma and 2345-2613 Ma, indicating three main Precambrian magmatic events in the Quruqtagh area.
出处
《北京大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第3期467-474,共8页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
国家自然科学基金(40032010)资助
