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对采自大别山主峰天堂寨地区高差约1.4 km的垂直剖面内不同高程上的6个样品进行了锆石/磷灰石的(U-Th)/He和裂变径迹分析, 分析结果表明天堂寨地区在晚白垩世~早第三纪期间仍处在冷却剥露过程之中. 垂直剖面上各样品的各个测年体系的年龄-高程关系表明, 在距今110 Ma时存在一个快速的冷却剥露时期; 从距今90 Ma开始, 各样品的年龄随着高程的降低而减少, 可以进一步识别出两个具有不同平均视剥露剥蚀速率的时期. 43.4~22.5 Ma间的平均视剥露剥蚀速率为0.062 km/Ma, 76.4~47.4 Ma间的平均视剥露剥蚀速率为0.039 km/Ma.
U-Th / He and fission track analyzes of zircon / apatite were carried out on six samples collected at different altitudes in a vertical section of about 1.4 km in the Tiantangzhai area, the main peak of the Dabie Mountains. The results show that Heaven During the Late Cretaceous to Early Tertiary period, the Walled area was still undergoing the process of cooling and exfoliation.The age-elevation relationship of each dating system of each sample in the vertical section showed that there was a rapid cooling at 110 Ma During the period of exhumation, from the beginning of 90 Ma, the age of each sample decreased with the elevation decreasing, and two periods with different average rates of denudation and denudation could be further identified. The average apparent denudation between 43.4 and 22.5 Ma The denudation rate is 0.062 km / Ma, and the average stripping rate between 76.4 and 47.4 Ma is 0.039 km / Ma.