A detailed rock density model of the Hong Kong territories  

作　　者：Albertini Nsiah Ababio Robert Tenzer 

机构地区：[1]Department of Land Surveying and Geo-Informatics,Hong Kong Polytechnic University,Hong Kong,China

出　　处：《Geodesy and Geodynamics》2024年第1期75-81,共7页大地测量与地球动力学（英文版）

基　　金：supported by the Hong Kong GRF RGC project 15217222:“Modernization of the leveling network in the Hong Kong territories.”。

摘　　要：We used the geological map and published rock density measurements to compile the digital rock density model for the Hong Kong territories.We then estimated the average density for the whole territory.According to our result,the rock density values in Hong Kong vary from 2101 to 2681 kg·m^(-3).These density values are typically smaller than the average density of 2670 kg·m^(-3),often adopted to represent the average density of the upper continental crust in physical geodesy and gravimetric geophysics applications.This finding reflects that the geological configuration in Hong Kong is mainly formed by light volcanic formations and lava flows with overlying sedimentary deposits at many locations,while the percentage of heavier metamorphic rocks is very low(less than 1%).This product will improve the accuracy of a detailed geoid model and orthometric heights.

关 键 词：Density model Rock types Gravimetric modeling Hong Kong 

分 类 号：P223[天文地球—大地测量学与测量工程]