Study Of Geologic Features Of Regional Gravity Anomaly In Henan

The article is based on some projects from Henan academy of geology survey in these years, which are "1:200 thousand region gravity survey in Luoyang to Jiaozuo of Henan province"" 1:200 thousand region gravity survey in Zhengzhou to Jiaozuo of Henan province" "1:200 thousand region gravity survey in Zhengzhou to Kaifeng of Henan province" and "1:200 thousand region gravity survey in Zhengzhou to Luoyang of Henan province".In the article the author analyzed gravity abnormity characters in 1:200 thousand region gravity survey in Luoyang to Zhengzhou, and researched geological characters of the structure unit fault sediment basin concealed rock and perspective ore zone. According as region gravity abnormities of study zone and other existing data of geology geophysics and geochemistry, gravity abnormities was calculated in quantity and quality in research zone. The gravity abnormities zone was divided into five secondary zones as Taihang mountain secondary zone Jiyuan to zhengzhou secondary zone Songqi secondary zone Xinan to Mengjin secondary zone Jiaxianguanyintang to Luoning secondary zone. After reasonable explained the research zone was divided into five thirdly structure as Shanxi fault up-warp Jiyuan to Zhengzhou fault down-warp Xinan to Mengjin fault down-warp Guanyintang to Luoning fault up-warp and nine fourthly order small structure zone. Forty eight faults was concluded in research zone ,thereinto four faults are secondly order and fourteen faults are thirdly order and thirty faults are fourthly order. After emphases discussed concluding secondary order structure, seven depression basins in Cenozoic were drawn out and concluded an acidity concealed rock as Zouma hill rock in Taihang mountain o3f the first time. There being a concluded concealed rock, the prospective zone of colored metal such as copper lead zinc were enlarged. Two prospective zones of colored metal such as copper lead zinc were drawn out. Three petroleum (gas) prospective zones and ten geothermal prospective zones were drawn out. The author discussed the hydrology engineering and environment from the gravity field, specially discussed the influences of fault structure to middle line project of south water transporting to north in research zone, and advised some progress to defend possible hidden trouble. The research result was enriched the basic data. There has important direction meaning for basic geological researching ore forecasting city designing important engineering construction and defending earthquake and disaster.