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根据实测资料计算,莺歌海盆地平均大地热流为 84.1mW/m~2.通过对莺歌海盆地构造热演化模拟研究,揭示了盆地在新生代的热演化特征:新生代3期拉张使盆地逐步升温, 5.2 Ma以来盆地达到历史最高温时期,目前处于热流下降期;在新生代,基底热流始终在 50~70 mW/m~2之间,表明 3期拉张并未引起盆地异常高热流,这与盆地尺度及拉张特征有关;盆地地表热流主要受基底热流控制,沉积物放射性生热仅占不足 20%.
According to the measured data, the average geothermal heat in Yinggehai Basin is 84.1 mW / m ~ 2. Through the study of the tectonic thermal evolution in the Yinggehai Basin, the thermal evolution characteristics of the basin during the Cenozoic are revealed. During the Cenozoic Era 3, the basin was gradually warmed and the basin reached its historical maximum temperature since 5.2 Ma, In the Cenozoic, the basal heat flux was always between 50-70 mW / m 2, indicating that the 3rd stretch did not cause abnormal high heat flow in the basin, which was related to the scale and extension characteristics of the basin. The surface heat flux in the basin was mainly affected by the basal Heat flow control, sediment radioactive heat only accounts for less than 20%.