| 曹煜昊,马伟,董月,郭晓光,王明昊.辽南地区新元古代南华系冰碛物沉积特征[J].矿产勘查,2026,17(4):585-592 |
| 辽南地区新元古代南华系冰碛物沉积特征 |
| Sedimentary characteristics of Neoproterozoic Nanhua System moraines in southern Liaoning |
| 投稿时间：2024-07-31 |
| DOI：10.20008/j.kckc.202604001 |
| 中文关键词: 南华系 冰碛物 沉积特征 辽南中图分类号:P532文献标志码:A文章编号:1674-7801(2026)04-0585-08 |
| 英文关键词: Nanhuan system moraine sedimentary characteristics southern Liaoning |
| 基金项目: |
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| 中文摘要: |
| 南华系以冰川活动的广泛出现为特征，关于辽宁地区是否存在南华系，尤其是否有冰碛物堆积事件存有争议。本文通过对辽南地区南华系岩石地层单位的对比与研究，识别出两次冰期:第一次殷屯冰期为一套陆相冰碛沉积，分布于辽南永宁盆地中，见有大量冰碛砾岩；第二次冰期沉积涉及海相沉积的桥头组及长岭子组，在粉砂质页岩中发现规模不等的冰筏坠石，是冰期的有力证据。殷屯组的厘定为辽南地区首次发现，并与辽北殷屯组进行对比，同属辽宁南华系最高层位。殷屯组冰碛事件可与南方南华系长安组冰期相对比，桥头组及长岭子组冰碛事件可与南方南华系南沱组冰期对比。 |
| 英文摘要: |
| Nanhua System is characterized by extensive occurrence of glacier activity. There is controversyabout whether Nanhua System exists in Liaoning region, especially whether there are moraine accumulation events.Based on the comparison and study of Nanhua System lithostratigraphic units in southern Liaoning, this paper iden.tifies two glacial periods: the first Yintun glacial period is a set of continental moraine deposits, distributed inYongning Sag basin, southern Liaoning, with a large number of moraine conglomerates; the sediments of the secondglacial period are related to the Qiaotou Formation and Changlingzi Formation of marine sediments, and the ice raftfalls of different sizes are found in the silty shale, which is a strong evidence of the glacial period. The Yintun For. mation is the first discovery in southern Liaoning, and compared with the northern Yintun Formation, it belongs tothe highest position of Nanhua System in Liaoning. The Yintun Formation moraine events can be compared with theNanhua Changan Formation glacial period, and the Qiaotou Formation and Changlingzi Formation moraine eventscan be compared with the Nantuo Formation glacial period. |
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