Discovery of a Magnetite Layer in the Dongmaanshan Formation in the Shiji Surveyed Area, Zongyang County and Its Implications for Mineral Exploration
详细信息
- 责任者：Li Xiangzheng (No.815 Team ; East China Metallurgical Bureau of Geology and Exploration ; Chaolu 238000 ; China)
- 刊名：Geology of Anhui
- 出版年：2013
- 卷期：23(2)
- 页码：p.94-97
- issnNo：ISSN1005-6157
- isbnNo：CN34-1111/P
摘要
During a geological survey in the contact between the late Yanshanian syenite-granitoid intrusion and the basement outside the southern fringe of the Lu-Zong volcanic basin,an iron-rich horizon and bedded magnetite ore body was found in the ZK402 core intersection of 9.65m in thickness in the mid-Triassic Dongmaanshan Formation of carbonatite.Ore is dominantly massive magnetite with filling and replacement relic texture,and the ore-rich horizon and wall rock are associated with limonitization(hematization),silication,carbonatation and chloritization,indicating that mineralization is a combined result of strata bounding and hydrothermal superimposition,and then attesting to the universality of the Dongmaasnhan Formation of iron-rich horizon in forming iron ore deposits in the area along the Yangtze River and in the fringe of the Lu-Zong volcanic basin.