关键词: 山东省, 单县, 铁矿, 勘查, 预测

Abstract:

There are many iron deposits under the covered area in southwest of Shandong province. In Shanxian County of Heze City, the iron ores are sedimentary metamorphics deposits. These iron bodies occurs in the Shancaoyu formation of the Neo Archean Taishan Group, buried under Quaternary to Paleocene stratum with the thickness from 458 m to 549 m, appearing as stratum, stratoid, lenticular, and consistent with its surrounding rock, with occurrence of NW-SE strike, tendency SW of dip angle 45°-60°. The iron average grade is TFe 25% and mFe 20%. This paper introduced a prospecting process including geological methods and geophysical exploration methods in detail. With the help of the analysis from geophysical data in Shanxian County iron area, important geological information, such as the geological characteristics of bedrock, the buried faults, has been abstracted. Further with large scale geological information and geophysical information, a forecasting model that concludes geological environment, deposit characteristics and geophysical characteristics (higher magnetic anomaly, higher gravity anomaly, and its gradient zone) is established. Following the exploration of Daliuzhuang iron deposit under a thick stratum, a exploration flowchart is depicted as the following: aeromagnetic anomaly selection, comprehensive and systematic data collection, exploration areas selection, magnetic and gravity survey, analysis of the geological information, the large scale magnetic and gravity section survey, CSAMT and SIP survey, mineralization position selection, deep drilling exploration magnetic survey in drilling hole.

Key words: Shandong province, Shanxian County, iron deposits, exploration, forecasting