山西天镇含恐龙化石地层的年代及地热史的裂变径迹研究

Investigation of the age and geological thermal history of the strata containing dinosaurus fossile in Tianzhen County of Shanxi Province

用磷灰石和锆石裂变径迹技术研究了山西天镇含恐龙化石地层的年代及地热史。结果表明，恐龙骨骼埋藏年代不会早于晚白垩纪；在７３Ｍａ之前源区曾受到温度达２００─２５０℃的热作用，随后发生冷却、搬运并形成沉积地层。自晚白垩纪恐龙骨骼埋藏至今，该地层一直处于环境温度，没有受到明显的热作用。

The age and thermal history of the strata containing dinosaurus fossile in Tianzhen County of Shanxi Province have been studied using apatite and zircon fission track analysis.It is shown that the burial age of dinosaurus skeletons is not earlier than Late Cretaceous.The provenance area of the strata had experienced heating events with temperature higher than 200-250℃ 73Ma ago. But the strata has been at environmental temperature and never been affected by heating events since the dinosaurus skeletons were buried.