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

孟庆强 宋立军 袁炳强

MENG Qingqiang SONG Lijun YUAN Bingqiang

中国石化 石油勘探开发研究院, 北京 100083 西安石油大学 地球科学与工程学院, 西安 710065

Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 100083, China Oil Resources Faculty, Xi'an Shiyou University, Xi'an, Shaanxi 710065, China

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。

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.

国家自然科学基金项目 41102072;国家自然科学基金项目 41872164;国家自然科学基金项目 41102075

https://doi.org/10.11781/sysydz202002241