Abstract Heat flow and thermal state complement seismic information and provide strong constraints on the thickness, geophysical properties, and tectonic evolution of the lithosphere. The North Jiangsu Basin (NJB) is located in the Lower Yangtze Craton as a wedge block of ancient plate boundary-adjacent to the southeast corner of the North China Craton experienced destruction in the Late Mesozoic, and it is of great interest to learn the geothermal characteristics of the basin. We present 71 new heat flow measurements derived from temperature logs and detailed thermal conductivity measurements of 189 dry core samples and 24 outcrop samples. We analyze these new data in combination with published data to plot the temperature gradient and heat flow distribution maps. The results show that: (1) temperature gradient values in the NJB are in the 21.5–59.2 °C km−1 range, with a mean value of 30.2 ± 6.5 °C km−1; (2) heat flow values are in the 45.7–109.7 mW m−2 range, with a mean value of 67.9 ± 7.7 mW m−2; (3) the highest temperature gradient and heat flow value is located in or around the Jianhu Uplift, and thermal refraction is the leading cause; and (4) the destruction of the North China Craton at the end of the Late Mesozoic was likely to affect the NJB, and the unified deep dynamic mechanism makes the NJB and the Bohai Bay Basin now in a similar thermal state.

中文翻译：

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华东苏北盆地现今地热状况

摘要 热流和热状态补充了地震信息，并对岩石圈的厚度、地球物理特性和构造演化提供了强有力的约束。苏北盆地（NJB）位于下扬子克拉通作为古板块边界的楔块——毗邻华北克拉通东南角，在晚中生代遭受破坏，地热研究具有重要意义。盆地特征。我们提供了 71 项新的热流测量值，这些测量值源自温度测井数据以及 189 个干岩心样本和 24 个露头样本的详细热导率测量值。我们结合已发布的数据分析这些新数据以绘制温度梯度和热流分布图。结果表明：（1）新泽西州的温度梯度值在21。5–59.2 °C km-1 范围，平均值为 30.2 ± 6.5 °C km-1；(2) 热流值在 45.7–109.7 mW m-2 范围内，平均值为 67.9 ± 7.7 mW m-2；(3) 最高温度梯度和热流值位于剑湖隆起内或周围，热折射是主要原因；(4) 晚中生代末华北克拉通的破坏可能会影响到新界北部，统一的深部动力机制使新界与渤海湾盆地现在处于相似的热状态。