摘要
通过对部署在西昆仑新疆叶城县南提孜那甫河与和田市南喀拉喀什河山前3条河谷阶地横剖面所提供的实际资料和ESR、14C年代测试数据的分析,结果表明:①西昆仑这两条相距250km河流属于同一个山前地貌单元;②剖面Ⅰ、剖面Ⅲ的T4、T3、T2、T1分别形成于约100kaB.P.、80kaB.P.、50kaB.P.、30kaB.P.;③依据形成时代,剖面Ⅰ的T3、T2、T1分别对应剖面Ⅱ的T4、T3、T2,剖面Ⅱ的T1形成于8.5kaB.P..对横剖面的对比并结合纵剖面,认为该地区100kaB.P.以来山前河谷地貌的形成,气候作用大于新构造作用;8.5kaB.P.前后发生过一次新构造的抬升作用.
Field data on terraces and formation times based on ESR, ^14C chronology is given for three river transverse profiles on the Tizinafu River in south Yecheng County and on the Kalakashi River in south Hetian City, both in front of the west Kunlun Mountains of Xinjiang Province. Based on the data it is suggested that： ① in this region, the two rivers are part of the same geomorphic unit; ②T4 . T3, T2 and T1, of profile Ⅰ and Ⅲ formed at about 100kaB.P, 80kaB.P., 50kaB.P and 30kaB.P. respectively; ③according to formation times, T3, T2 and T1 of profile Ⅰ correspond to T4, T3 and T2 of profile Ⅱ, and T1 of profile Ⅱ formed in 8.5kaB.P. From studying transverse and longitudinal profiles it is concluded that the climate operation is stronger than the new tectonics in this area since 100kaB.P. and that a new period of uplifting took place in 8.5kaB.P.
出处
《新疆地质》
CAS
CSCD
2006年第2期115-119,共5页
Xinjiang Geology
基金
中国地质调查局"青藏高原北部空白区基础地质综合研究"(1212010510110)项目资助
关键词
西昆仑
提孜那甫河
喀拉喀什河
河流阶地
构造抬升
气候变化
West Kunlun Mountain
Tizinafu River
Kalakashi River
river terraces
tectonic uplift
climate change.
