| 青藏高原亚东—格尔木条带布格重力异常数字图象处理与地壳现代构造 |
| 点此下载全文 |
| 引用本文：高锐,孟令顺,李莉.1990.青藏高原亚东—格尔木条带布格重力异常数字图象处理与地壳现代构造[J].地球学报,11(2):162-173. |
| DOI： |
| 摘要点击次数: 2669 |
| 全文下载次数: 2950 |
|
| 基金项目:国家自然科学基金会重点资助的“亚东—格尔木地学断面研究”课题 |
|
| 中文摘要:本文在微型计算机上实现了对研究区布格重力异常的数字滤波处理，并用假彩色图象的数字干涉技术，详细研究了地壳的现代构造格局和形变踪迹。追踪描述了由代表着地体边界断裂的东西向大型走滑断层的拉伸作用而形成的NS向正断层。识别出由NE向、NW向构造构成的走滑断裂系统。走汾构造的活动是使青藏高原南北向缩短和地震活动的主要因素之一。突出深部异常的滤波图象显示出，麻江一比如的NE向走滑断裂至少切穿了上地壳。同时也指示出深部异常的最低值位于羌塘地体，从地壳均衡角度分析，可能意味着唐古拉山有很深的山根。 |
| |
| THE IＭAGERY PROCESSING OF GRAVITY ANOMALY IN THE YADONG—GOLMUD STRIP ON QINGHAI-XIZANG PLATEAU AND ITS RECENT CRUSTAL STRUCTURE |
|
|
| Abstract:Digital filtering processing has been carried out with a macrocornputer. By utilizing the pseudo-color image(digital interference) technique, we have investigated the recent structural features and deformation traces of the crust. This paper has disczibed the extension process on the large WestEast strike-slipes, which is considered as margin faults. The subsequent normal faults are also mentioned. The fault system consisting of northeast and northwest structures was recognized. The activity of strike-slipes is one of the main reasons why Qinghai-Xizang plateau is shortened in North-South direction and earthquakes occur in this area. The filtered images that clearly reflect the deep anomalies show that the northeast-trending Yangbajing-Biru strike-slip at least cuts through the upper crust. It is also seen that the lowest value of the deep anormalies is found around Qiangtang block, which, in the aspect of isostasy, may mean that Tarnggula Mountain has a very deep root. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
