| 付海涛.鞍本地区太古宙原型沉积盆地恢复初探[J].地质与勘探,2014,50(3):494-503 |
| 鞍本地区太古宙原型沉积盆地恢复初探 |
| Restoration of the Archean sedimentary basin in the Anshan-Benxi region |
| 投稿时间：2013-10-01 修订日期：2014-01-13 |
| DOI： |
| 中文关键词: 鞍本地区 沉积变质型铁矿 太古宙原型沉积盆地 盆地恢复 |
| 英文关键词: Anshan-Benxi area, sedimentary-metamorphic iron ore, Archean prototype sedimentary basin, basin restoration |
| 基金项目:国土资源部公益性行业科研专项（编号：201111002-02）资助 |
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| 中文摘要: |
| 鞍本地区是我国重要的沉积变质型铁矿矿集区，本文作者通过对该区区域航磁、重力等物探资料进行解译，结合区域地质与矿产资料，尝试对该区太古宙沉积盆地形态进行恢复，对其演化过程进行讨论，提出沉积了鞍山群的盆地原始形态为近东西向展布的断陷型盆地，在2.0~2.7 Ga期间遭受变质变形改造，最终形成轴向近南北的直立水平褶皱的认识。笔者认为通过对原型盆地的恢复，将有助于解释鞍山群各岩组同位素测年结果相近的问题，同时也能为合理部署铁矿找矿工作提供依据。 |
| 英文摘要: |
| The Anshan-Benxi area is a major sedimentary-metamorphic iron ore district in China. Based on interpretations of gravity and aeromagnetic data, in combination with regional geology and mineral information, this work attempted to reconstruct the morphology of the Archean sedimentary basin in this area and to study its evolution. The results suggest that the original form of the basin, deposited Anshan Group, was a nearly EW-trending faulted depression. It experienced metamorphism and deformation during 2.0~2.7 Ga, leading to formation of an upright horizontal fold with a nearly NS-strike axis. This restoration of the basin prototype would help interpret the problem of similar dating data of isotopes among all rock sets of the Anshan Group, and provide a basis for reasonable deployment of search work for iron ores. |
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