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标题：Characteristics of the crystalline basement beneath the Ordos Basin: Constraint from aeromagnetic data
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作者：Zhentao Wang ; Hongrui Zhou ; Xunlian Wang 等
期刊名称：Geoscience Frontiers
印刷版ISSN：1674-9871
出版年度：2015
卷号：6
期号：3
页码：465-475
DOI：10.1016/j.gsf.2014.02.004
语种：English
出版社：Elsevier
摘要：AbstractAeromagnetic anomaly zonation of the Ordos Basin and adjacent areas was obtained by processing high-precision and large-scale aeromagnetic anomalies with an approach of reduction to the pole upward continuation. Comparative study on aeromagnetic and seismic tomography suggests that aeromagnetic anomalies in this area are influenced by both the magnetic property of the rock and the burial depth of the Precambrian crystalline basement. Basement depth might be the fundamental control factor for aeromagnetic anomalies because the positive and negative anomalies on the reduction to the pole-upward-continuation anomaly maps roughly coincide with the uplifts and depressions of the crystalline basement in the basin. The results, together with the latest understanding of basement faults, SHRIMP U-Pb zircon dating of metamorphic rock and granite, drilling data, detrital zircon ages, and gravity data interpretation, suggest that the Ordos block is not an entirety of Archean.Graphical abstractDisplay OmittedHighlights•We collected the latest high-precision aeromagnetic data over Ordos Basin and its adjacent areas.•Aeromagnetic anomalies are influenced by both rock magnetic property and its buried depth.•The Ordos block should not be an entirety of Archean, which differs from the traditional idea.
关键词：KeywordsenNorth China CratonOrdos BasinAeromagnetic anomalyContinental nucleusBasement