| 河西走廊地块古生代地层古地磁初步研究 |
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| 引用本文： | 贺正轩,郑昭昌,朱鸿.河西走廊地块古生代地层古地磁初步研究[J].现代地质,1988(2). |
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| 作者姓名： | 贺正轩 郑昭昌 朱鸿 |
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| 作者单位： | 宁夏地矿局地质研究所
(贺正轩，郑昭昌)，中国地质大学(朱鸿) |
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| 摘 要： | 古地磁初步研究结果表明,早古生代阶段,河西走廊过渡带与阿拉善地块古纬度接近,且漂移过程中形影相随,说明其间并无洋盆相隔。志留纪末,河西走廊过渡带与阿拉善地块拼接,但二者磁极位置与古方位均有差异,可能表明走廊过渡带相对于阿拉善地块同时作了顺时针旋转。泥盆纪时,两地块古纬度一致,但古方位不同,可能反映在碰撞拼合后二者间仍有相对的旋转运动。二叠纪时,二块体的空间位置及其配置关系已与现状接近。
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| 关 键 词： | 古地磁学 阿拉善地块 河西走廊过渡带 古方位 旋转 |
A PRELIMINARY RESEARCH ON PALEOMAGNETISM OF PALEOZOIC STRATA IN THE HEXIZOULANG MASSIF |
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| He Zhengxuan Zheng Zhaochang.A PRELIMINARY RESEARCH ON PALEOMAGNETISM OF PALEOZOIC STRATA IN THE HEXIZOULANG MASSIF[J].Geoscience——Journal of Graduate School,China University of Geosciences,1988(2). |
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| Authors: | He Zhengxuan Zheng Zhaochang |
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| Abstract: | The preliminary paleomagnetism results indicate that the Paleolatitude of the ALXA Massif are close to the Hexizoulang transitional zone in the Early paleozoic period, and they were near by each other during drifting, which shows that there was no oceanic basin between the two massifs. The Hexizoulang transitional zone amalgamated with the ALXA Massif by the end of the Silurian period, but the pole position and paleo-orientation of them are different, which probably indicates that the Hexizoulang zone had rotated clockwise with respect to the ALXA Massif at that time. In the Devonian period,the paleolatitude of the two massifs are consistant,but their paleo-orientation are different, so these imply that there was rotation movement between them after amalgamation. In the Permian period, the space relationship and distribution of them had been similar to that of the present one. |
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| Keywords: | : Paleomagnetism ALXA Massif Hexizoulaug transitional zone paleo-orientation rotation |
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