• 责任者：Fan Yu (School of Resources and Environment Engineering ; Hefei University of Technology ; Hefei 230009 ; China) ; Zhou Taofa
• 刊名：Acta Geologica Sinica
• 出版年：2011
• 卷期：85(5)
• 关键词：玢岩铁矿床 ; porphyrite iron deposit ; 成矿期 ; metallogenic period ; 长江中下游成矿带 ; Metallogenic Belt of Middle and Lower Reaches of Yangtze River
• 页码：p.810-820
• 图表：4 illus., 1 table, 58 refs.
• 分类号：1001
• issnNo：ISSN0001-5717
• isbnNo：CN11-1951/P

The Ning-Wu Basin is the important component of the middle-lower Yangtze metallogenic belt. Based on detailed field geological works, the authors present new ⁴⁰Ar-³⁹Ar phlogopite ages for the typical Taocun, Baixiangshan and Hemushan iron deposits to constrain the timing and duration of mineralization in the basin. Phlogopite from the Taocun, Baixiangshan and Hemushan iron deposits yielded ⁴⁰Ar-³⁹Ar plateau ages of (129.3±1.1) Ma, (130.7±1.1) Ma and (129.1±0.9) Ma, respectively. The results indicate that different porphyry-like type iron deposits in the Ning-Wu Basin all formed in early stage of Early Cretaceous about 130  Ma, obviously later than skarn-porphyry Cu-Au deposits related to high-k calc-alkaline intrusions in uplift areas.