江西省实测地表热流值及特征

Surface Heat Flow Values and Characteristics,Jiangxi

综合已有资料,共收集25个江西省大地热流数据。全省实测热流平均值为70.14 mW/m^2,略高于全球大陆热流平均值。根据其热流值特点,结合区域地质构造背景,可分为3个热流对比区——赣北、赣中、和赣南地区。赣北和赣南地区分别处于扬子地块东南缘江南造山带和华夏地块华南造山带中,实测地表热流平均值分别为58.0、76.03 mW/m^2。赣中包括赣东北地区受到华夏和扬子地块对接碰撞影响,经历沉积、推覆作用和岩浆作用等地质活动,表现出较高的地表热流值72.21 mW/m^2。自赣北、经赣中到赣南,地表热流值越来越高,反映了不同区域在岩石组成、放射性生热元素含量、地壳厚度、构造活动和岩石圈热结构上的差别。

Based on the available data, 25 geothermal heat flow data collected from Jiangxi were collected. The average heat flux measured in the whole province is 70.14 mW/m2, slightly higher than the average value of global continental heat flow. According to the characteristics of heat flow value and combined with regional geological tectonic background could divided into three heat flow contrast zones-north Jiangxi, central Jiangxi, south Jiangxi. North Jiangxi and south Jiangxi in the Jiangnan orogenic belt and the Southern China orogenic belt, respectively, the measured surface heat flux averaged 58.0 mW/m2 and 76.03 mW/m2 respectively. central Jiangxi Including in the northeast of Jiangxi by Cathaysian plate and Yangtze plate collision effect, experienced geological processes such as deposition, thrusting and magmatism, so it have high surface heat flow value 72.21 mW/m2. From north Jiangxi to south Jiangxi, the surface heat flow is more and more high. It is reflect of differences in rock composition, radiogenic heat, element content, crustal thickness, tectonic activity and lithospheric Thermal structure.