MAGNETIC ANOMALY FEATURES OF THE MABIANSHAN IRON ORE DEPOSIT IN THE NORTHERN PART OF THE LU-ZONG VOLCANIC BASIN AND ORE-PROSPECTING PROGNOSIS
SHANG Shi-gui;No.327 Team of Bureau of Geology and Mineral Exploration of Anhui Province;
The Mabianshan iron ore deposit lies at northern fringe of the Lu-Zong volcanic basin and is hosted in the Dongmaanshan(T2d) iron-bearing and calcareous muddy siltstone. Aeromagnetic map shows that gradient zone is locally overlapped with anomaly, and the local anomaly is regular in form with its trend generally parallel to the zone. Ground magnetic and aeromagnetic features are well matched, without decomposed anomaly. Ground magnetic profile curve is continuous, complete, with pairs of negative and positive and gentle. Wavelet transformation well separates out mineralized anomaly. Local gentle magnetic anomalies on the west and north sides of the basin are important indicators for seeking this kind of iron ore deposit.