摘要
笔者在白龙江流域的地貌考察中,首次发现了位于海拔2,000m以上的地区发育有古喀斯特地貌,并可分为三层,分别位于海拔2,200m、2,600m和3,000m的高度,可与区内广泛存在的三级夷平面对比。本文为近年来有关青藏高原古喀斯特发育问题争论提供了一个新的证据。
In this paper, in the course of field investigation on Landforms and environment in Bailongjiang basin in 1989—1990a., we discovered at first that there are typical Tertiary paleokarst landforms in the area over 2000m a.s.l., which include Fongchong (or tower karst), sink hole, corrosion depression trough, karst collapse, karren and karst cave. Paleokarst landforms can be clearly divided into 3 layers, separately lying in 2,200m a.s.l., 2,600m and 3,000m. These layers have developed since Tertiary. On the basis of topographic features of the paleokarst landforms, environmental analysis and chemical analysis to clay of red weathering bed in the surface of Fongchong, we expound that there were obviously the three planation processes and three moist and hot times in Tertiary, which provide a new proofs for the disputation recent year on paleokarst development in Qinghai-Xizang plateau.
出处
《云南地理环境研究》
1991年第2期49-54,共6页
Yunnan Geographic Environment Research
基金
国家教委博士点基金
