| 胶辽地块古元古代沉积组合：年代与层序 |
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| 引用本文： | 李三忠,刘永江.胶辽地块古元古代沉积组合：年代与层序[J].西北地质,1997,18(3):13-20. |
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| 作者姓名： | 李三忠 刘永江 |
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| 作者单位： | 西北大学!西安，710069，长春地质学院!长春，130061 |
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| 摘 要： | 根据变质岩石组合、成矿特征等方面对比研究，证明胶辽地块古元古代粉子山群、北部辽河群、老岭群可对比，荆山群和南部辽河群、集安群亦可以比，相应的北部和南部变质地层为同时异相。通过对各群同位素年代学资料的收集总结，表明它们沉积于2．5至1．9Ga期间，变质作用起始于2．2Ga，终止于正．6Ga。以辽河群为例，各岩组的原岩恢复及沉积环境讨论，表明整个裂陷带经历了从裂谷盆地向被动大陆边缘转化。最后于该活动带南缘转变为活动大陆边缘的，反映了该活动带完整的层序沉积环境变迁过程。
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| 关 键 词： | 胶辽地块 古元古代 沉积组合 |
PALAEOPROTEROZOIC SEDIMENTARY ASSEMBLAGES IN THE JIAO-LIAO MASSIF: AGES AND STRATIGRAPHIC SEQUENCE |
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| Li Sanzhong.PALAEOPROTEROZOIC SEDIMENTARY ASSEMBLAGES IN THE JIAO-LIAO MASSIF: AGES AND STRATIGRAPHIC SEQUENCE[J].Northwestern Geology,1997,18(3):13-20. |
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| Authors: | Li Sanzhong |
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| Abstract: | Based on comparison of Palaeoproterozoic metamorphic rocks, mineralization andother aspects, the Fengzishan Group in Jiaodong peninsula could be compared with the northLiaohe Group in Liaodong peninsula and the Laolin Group in south Jinn province, they belong tothe northl Similarly, the Jinshan Group could be coincided with the south Liaohe and Ji' anGroups, they belong to the south. However, the south deposited conteparaneously with thenorth but in different sedimentary environments, respectively. They deposited from 2. 5 Ga to1. 9 Ga and were metamorphosed from 2. 2 Ga to 1. 6 Ga. As an example with the LiaoheGroup, the protolith recovery and sedimentary environments of each formation show that the beltunderwent the process from rift basin, via passive continental margin to active continental margin. |
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| Keywords: | Palaeoproterozoic Jiao--Liao massif sedimentary assemblages |
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