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| 鲁西孟家屯岩组中发现红柱石和锌尖晶石 | |
| 引用本文： | 杜利林,庄育勋,杨崇辉.鲁西孟家屯岩组中发现红柱石和锌尖晶石[J].地质通报,2003,22(1):65-67. |
| 作者姓名： | 杜利林 庄育勋 杨崇辉 |
| 作者单位： | 1. 吉林大学地球科学学院 吉林 长春 130061 2. 西藏地质调查研究院,西藏,拉萨,850000 3. 西藏地质调查研究院,西藏,拉萨,850000;中国地质调查局西南项目办公室西藏1:25万区域地质调查监理专家组 4. 云南省地质调查研究院,云南,昆明,650011;中国地质调查局西南项目办公室西藏1:25万区域地质调查监理专家组 5. 成都地质矿产研究所,四川,成都,610081;中国地质调查局西南项目办公室西藏1:25万区域地质调查监理专家组 6. 成都地质矿产研究所,四川,成都,610081 |
| 摘 要： | 侯增谦、高永丰、黄卫于２００１年发表的《西藏高原雅鲁藏布江北岸蛇绿岩带的发现及其地质意义》一文中，把所发现的蛇绿岩带描述为“谢通门蛇绿岩带东起大竹卡区，西至谢通门以西，长数百千米，宽３～５km，由一系列自北而南逆冲推覆的构造岩片构成，其中，基性玄武熔岩岩片、巨厚辉长岩岩片、超镁铁质辉石岩－纯橄岩岩片，依次由雅江近岸至冈底斯弧内部呈叠瓦状排布。变质橄榄岩出露零星，少许孤立的岩体出露于雅江近岸，发育强烈碳酸盐化和蛇纹石化；大量散布的岩群出露于堆积岩岩片的北侧，多在冈底斯弧花岗岩基和弧火山－沉积岩系中呈… |
| 关 键 词： | 西藏 雅鲁藏布江 蛇绿岩 岩石化学 地球化学 年代学 |
| 文章编号： | 1671-2552(2003)01-0057-03 |
| 修稿时间： | 2002年3月29日 |
Environmental changes recorded by lacustrine sediments since Late Holocene in central Inner Mongolia |
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| ZHAO Zhi-li,WANG Yong,YAO Pei-yi,CHI Zhen-qing,GUAN You-yi.Environmental changes recorded by lacustrine sediments since Late Holocene in central Inner Mongolia[J].Geologcal Bulletin OF China,2003,22(1):65-67. | |
| Authors: | ZHAO Zhi-li WANG Yong YAO Pei-yi CHI Zhen-qing GUAN You-yi |
| Institution: | Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China |
| Abstract: | Based on a study of sedimentary features, grain sizes and pollen assemblages, the authors reconstructed a record of climatic and environmental changes in the past 1700 years for the Tengernur Lake in central Inner Mongolia. Some results have been obtained: From 1700 to 1170a, the climate was mainly warm and humid, and the water level of the lake was rising. From 1170 to 840a, the climate was arid and warm. From about 840 to 200 cal yr ago, a relatively warm and humid climate period existed, as evidenced by higher A/C ratios and finer grain sizes, and it was interrupted by a short cold and dry climate interval. Since 200a, the climate has been mainly warm and arid, with a tendency to dryness and coolness at the late stage. |
| Keywords: | central Inner Mongolia environmental changes Holocene pollen |
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