哥伦比亚普图马约次盆晚中生代—新生代古今大地热流值

Heat-flow value of Late Mesozoic to Cenozoic in Putumayo Sub-Basin, Republic of Colombia

摘要: 普图马约次盆地经历了多期构造演化，其大地热流史也经历了长期、复杂的演化过程。利用地质背景约束、古温标正演约束等多种方法，系统地确定了普图马约次盆自白垩纪以来各时期的大地热流值：白垩纪大地热流值为64 mW/m²；古新世大地热流值为95 mW/m²；渐新世末期大地热流值为38 mW/m²；上新世大地热流值处于120~190.00 mW/m²之间，平均155.00 mW/m²，且具有由东到西大地热流值增加的特征；今大地热流值为55 mW/m²。

Abstract: The heat-flow history of the Putumayo Sub-Basin has undergone a long-term and complex evolutionary process from the Late Mesozoic to the Cenozoic due to multiphases of tectonic evolution. The regional geologic background and the forward modeling of paleo-temperature were applied to determine the heat-flow value during different stages ever since the Cretaceous. The heat-flow value was 64 mW/m² in the Cretaceous, 95 mW/m² in the Paleocene, 38 mW/m² at the end of Oligocene, 120 to 190 mW/m² (increasing from east to west and averaging 155 mW/m²) in the Pliocene, and 55 mW/m² at present.