格尔木－额济纳旗地学断面热流研究与分析  

HEAT FLOW STUDY AND ANALYSIS ALONG THE GOLMUD-EJIN QI GEOTRANSECT

作　　者：沈显杰[1] 杨淑贞[1] 沈继英[1] 

机构地区：[1]中国科学院地质研究所

出　　处：《地球物理学报》1995年第A02期86-97,共12页Chinese Journal of Geophysics

基　　金：国家自然科学基金;地质矿产部重点资助

摘　　要：格尔木－额济纳旗地学断面共获１８个实测地表热流，波动于３０－７９ｍＷ／ｍ２之间，平均５６±１５ｍＷ／ｍ２．数据集中分布于昆仑北缘至柴达木北缘和祁连－河西走廊至北山南缘两段，中南祁连和北山北部为两个热流缺失段．为了弥补热流大幅波动及数据分布疏密不均，将１８个热流值归并为６个测区的平均热流值（ｍＷ／ｍ２）：４０（柴达木盆地东部），６５（柴北缘）、７０（北祁连镜铁山）、５１（酒东盆地）、５０（花海盆地）和６９（北山南白山堂），进一步用三分关联式生热率垂向分布模型和壳幔热流分量的试算调控，保证了岩石圈温度垂向分布的正演计算结果具有较好的地学代表性．In total 18 surface heat flow values were observed along the Golmud-Ejin Qi Geoscience Transect which range from 30 mW/m2 to 79 mW/m2 with an average value of 56 ±15 mw/m2.The data points are mainly clustered in two sections:from North-Kunlun to the northern Periphery of Qaidam Basin and from North-Qilian through Hexi corridor to the southern periphery of the Beishan Mis.while Mid-South Qilian and the northern part of the Beishan Mis.are two sections lack of observed heat flow.In order to remedy the large amplitude of fluctuation and the uneven distribution of the heat flow data,the 18 observed values are incorporated into 6 mean values for 6 heat flow observation sections in mW/m2 .They are:40 for the eastern part of Qaidam Basin,65 for the northern periphery of Qaidam Basin,70 for Jintieshan in North-Qilian,51 for Jiudong Basin,50 for Huahai Basin and 69 for Baishantang in South-Beishan,respectively.Furthermore,a trisect-connected verticalheat generation distribution model is employed and the crust-mantle thermal structure is preconditioned to guarantee an adequate geoscientific representativeness of the results ofstraightforward calculation of the lithospheric temperature distribution in the vertical direction.

关 键 词：热流 地学断面 格尔木地区 地热 

分 类 号：P314.2[天文地球—固体地球物理学]