| 利用天然地震震相探讨阿尔金地区地壳结构 |
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| 引用本文： | 薛光琦.利用天然地震震相探讨阿尔金地区地壳结构[J].地质论评,1999,45(2):120-124. |
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| 作者姓名： | 薛光琦 |
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| 作者单位： | 中国地质科学院矿床地质研究所，中国地质科学院矿床地质研究所，中国地质科学院矿床地质研究所，中国地质科学院矿床地质研究所 北京 100037，北京 100037，北京 100037，北京 100037 |
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| 摘 要： | 本文利用阿尔金地区的宽频地震数据，对布设在该区的１０个宽频地震台站用接收函数方法进行了速度结构反演，反演的初步结果发现，若至花土沟剖面在２０ｋｍ深度处有一条厚度达５～１０ｋｍ的低速带断续出现，莫霍界面呈台阶状展布，北部浅，南部深；塔里木盆地南缘的地壳厚度为４０～４２ｋｍ左右；在阿尔金南，北缘断裂两侧台站下方莫霍深度的错断约６．５～８ｋｍ，在柴达木盆地北缘，莫霍面的深度达５０ｋｍ以上，Ｓ波速为４．５
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| 关 键 词： | 阿尔金地区 宽频地震 地壳结构 地震 震相 |
Study of the Crustal Structure in the Altun Area Using the Teleseismic Phase |
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| Xue Guangqi,Jiang Mei,Shi Danian and Su Heping.Study of the Crustal Structure in the Altun Area Using the Teleseismic Phase[J].Geological Review,1999,45(2):120-124. |
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| Authors: | Xue Guangqi Jiang Mei Shi Danian and Su Heping |
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| Abstract: | Inversion on velocity structure was conducted applying the receiver function to the data from 10 of the broad-band teleseismic stations deployed in the Altun area. The tentative results show an intermittent low-velocity zone 5-10 km thick at a depth of around 20 km along the Ruo-qiang-Huatugou profile. The Moho is step-like, being shallow in the north and deep in the south. The crustal thickness is 40-42 km in the southern Tarim Basin. A drop of 6. 5-8 km in Moho depth is present beneath the stations on the sides of the Altun south-margin and north-margin faults, while the Moho depth beneath the northern margin of the Qaidam basin is up to over 50 km with an S wave velocity of 4. 5 km/s. |
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| Keywords: | Altun area broad-band teleseismic receiver function crustal structure |
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