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大别山地区中新生代从强烈的隆升作用和剥露作用为特色,形成了雄伟的秦岭—大别山系,构成了中国地质构造、自然地理和经济发展南北分野的天然屏障。因而深入研究其隆升剥露的具体过程具有重要理论和实践意义。 通过地质构造和同位素年代学研究,发现大别山地区隆升剥露过程极其复杂:印支期—早燕山期(240～180Ma)和中燕山期(晚侏罗世—早白垩世)经历了两次快速抬升剥露;晚白垩世—早第三纪的伸展剥离作用和断块隆升作用形成大别山高海拔地形,其平均海拔至少比现在高出660m以上;新生代以来则以剥露作用占主导地位。锆石和磷灰石裂变径迹测年进一步表明,大别地区新生代以来的剥蚀作用有加速之势;在空间上,东大别地区的剥露作用从南向北逐渐加强,与大别地
The Mesozoic and Cenozoic in the Dabie Mountains, featuring strong uplift and exhumation, formed the majestic Qinling-Dabie Mountain system and constituted a natural barrier to the north-south divide in China’s geological structure, natural geography and economic development. Therefore, it is of important theoretical and practical significance to study in depth the specific process of its uplift and exhumation. Through the study of geological structure and isotopic chronology, it is found that the process of uplift and exhumation in the Dabie Mountains is extremely complicated: the Indosinian-Early Yanshanian period (240-180 Ma) and the middle Yanshanian period (Late Jurassic-Early Cretaceous) have experienced two Rapid uplift and exhumation. Late Cretaceous-Early Tertiary epoch extension and faulting uplift formed the Dabieshan high altitude terrain, with an average elevation of at least 660m above the present; and Cenozoic dominated by dewfall status. Zircon and apatite fission track dating further indicates that the denudation has accelerated since the Cenozoic in the Dabie area. In space, the detritalization in the east Dabie gradually strengthened from south to north,