新闻
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170903/31266804_4.html
Server: cms-8-251
Date: 2025/01/24 21:50:35

Powered by China
China

西藏改则县发生4.1级地震 震源深度6千米

2017-09-03 07:00:51   中国青年网

而在四川盆地的两侧,由于没有坚硬地块的阻挡,来自高原的物质力量得以从盆地两边溜走。如果我们翻开地图,看一下云南以及东南亚地区的地形,就会发现有许多很深的南北向的峡谷,这就是被印度板块挤出的小型块体向南移动的过程中形成的。而在四川盆地的北边,即甘肃东部、宁夏等地,则形成了六盘山等山脉及一系列的断层。

地震是高原扩张的脚步——一次汶川地震才能把地壳抬高六七米

正如罗马不是一天建成的,这些山脉也不是一下子就升这么高的。这许许多多海拔数千米的高山都是一次次地震造成的,像汶川地震那么大的一次地震才能把地壳抬高六七米,一座4000米的高峰必定经历过大大小小数不清的地震。每一次地震都意味着高原的发展又前进了一步。

正面青藏高原的阿尔金山和河西走廊,恰位于高原的脚下,历史上亦饱受地震之苦。比如在河西走廊,1932年酒泉昌马发生7.6级地震,约7万人遇难;1927年武威古浪县发生8级大地震,死亡4万多人。

进入甘肃的东部和宁夏、陕西地区,以及云南、中南半岛,虽然离青藏高原已经有了比较远的距离,但依然没有逃出它的“势力范围”。由于四川盆地的阻挡,青藏高原外流的物质从它两侧分叉前进,给这些地区带来了巨大的灾害。比如在陕甘宁三省,历史上发生过多次强震:1739年平罗发生8级地震,死亡约5万余人;1556年在西安东部的华县发生8级地震,据震后统计,死亡约83万人,并重创西安,小雁塔的塔顶被震落,这可能是人类历史上死亡人数最多的一次地震。而在云南,地震同样频繁,比如在1988年云南南部的澜沧-耿马地区连续发生7.6、7.2级两次地震,伤亡惨重。在1996年,丽江发生7级地震,丽江古城遭受重创。

而且,来自印度板块的影响不仅限于高原及其周边,它还有隔山打牛的功夫。新疆天山,原本是一条古老的造山带,活动性已经比较微弱了,照理说青藏高原并不应该影响到它。但是,天山南部的塔里木板块实在是太过坚硬,来自高原的力量就传到了较为软弱的天山身上,使得原本已经比较稳定的天山发生了活化,天山地区发育了大量的断裂构造,地震频发,山脉再次隆盛,这被称作高原的远程效应。8月9日,发生在新疆博尔塔拉州精河县的6.6级地震就是天山构造活跃的证据。而在20世纪的上半叶,新疆也多次发生破坏性强震,比如1902年的喀什阿图什城8级大地震,1906年的玛纳斯县7.7级大地震等。

上一页4/5下一页
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170903/31266804_4.html
Server: cms-8-251
Date: 2025/01/24 21:50:35

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170903/31266804_4.html
Server: cms-8-251
Date: 2025/01/24 21:50:35

Powered by China
China

相关阅读

404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170903/31266804_4.html
Server: cms-8-251
Date: 2025/01/24 21:50:35

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170903/31266804_4.html
Server: cms-8-251
Date: 2025/01/24 21:50:35

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170903/31266804_4.html
Server: cms-8-251
Date: 2025/01/24 21:50:35

Powered by China
China
分享到:
0 0
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170903/31266804_4.html
Server: cms-8-251
Date: 2025/01/24 21:50:35

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170903/31266804_4.html
Server: cms-8-251
Date: 2025/01/24 21:50:35

Powered by China
China

美图推荐

404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170903/31266804_4.html
Server: cms-8-251
Date: 2025/01/24 21:50:35

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170903/31266804_4.html
Server: cms-8-251
Date: 2025/01/24 21:50:35

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170903/31266804_4.html
Server: cms-8-251
Date: 2025/01/24 21:50:35

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170903/31266804_4.html
Server: cms-8-251
Date: 2025/01/24 21:50:35

Powered by China
China

为您推荐

加载更多>>
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170903/31266804_4.html
Server: cms-8-251
Date: 2025/01/24 21:50:35

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170903/31266804_4.html
Server: cms-8-251
Date: 2025/01/24 21:50:35

Powered by China
China
404 Not Found

404 Not Found

Sorry for the inconvenience.
Please report this message and include the following information to us.
Thank you very much!

URL: http://3g.china.com:8080/act/news/11038989/20170903/31266804_4.html
Server: cms-8-251
Date: 2025/01/24 21:50:35

Powered by China
China