摘要
将昆北柴达木盆地与昆南可可西里盆地古近纪、中新世地层进行对比,发现二者无论在沉积上、生物上、古气候演化上,还是在构造发展阶段上都具有惊人的一致性。作为阻隔柴达木和可可西里二大盆地屏障的昆仑山至少在渐新统—中新世并未抬升,昆仑山在印支运动中期阶段抬升之后,曾长期处于风化剥蚀状态,在古近纪、中新世不断下降,渐新世—中新世时古昆仑山不复存在。
Paleocene-Miocene strata in the Qaidam Basin to the north of the Kunlun Mountain and the Kekexili Basin to the south of the Kunlun Mountain show similarities in sedimentary, paleontological, palaeoclimatic, and tectonostratigraphic features. Based on these data, we believe that the Kunlun Mountain that today separates the Qaidam Basin and Kekexili Basin was subdued during the Oligocene-Miocene. We also believe that the Kunlun Mountain must have experienced long-term weathering and erosion after its uplift in the middle Indo-China movement. But during the Paleocene-Miocene, the mountain may have been eroded continuously and then in the Oligocene-Miocene, the ancient mountain essentially disappeared.
出处
《地层学杂志》
CSCD
北大核心
2009年第3期276-282,共7页
Journal of Stratigraphy
基金
中国地质调查局国家青藏专项项目:青藏高原新生代地质作用过程与第四纪环境演变综合研究(No.1212010610103)
