新疆克孜尔水库F2活断层活动特征分析 *

摘 要 新疆克孜尔水库区内F2活断层的活动规律对水库的安全性有重要影响，对F2断层短水准长序列的观测分析表明:F2断层下盘近40年来持续发生着由南向北的地倾运动。这既影响了短水准高差计算结果，也影响了位错模型水平扭动量和滑动角两个用于评价断层活动性的参数的计算结果，从而使F2断层活动性评价失去客观性。本文通过第1形变监测站人工短水准前尺读数长序列走势分析获得F2活断层下盘测线方向上12米处地倾活动的年变速率（1979-2006）为0.224mm/a，根据库区F2活断层两侧地表沉降速率等值线图确定、验证第1形变监测站上、下盘测线方向上地倾活动年变速率（1991-2002）分别是0.03mm/a、0.07mm/a。对水平扭动量和滑动角的计算和分析表明:F2活断层近10余年来的活动虽与水库蓄水、库水沿活断层下渗、河流改道及地壳运动关系密切，但尚无法认定其活动正在或已经加剧。

DISCUSSIONS ON ACTIVITY OF FAULT F2 AT KIZIL RESERVOIR IN XINJIANG

The activity law of the active fault F2 nearby Kizil Reservoir area in Xinjiang has a major impact on the safety of Kizil Reservoir. The analysis of short leveling long observation sequence striding the active fault F2 shows that the lower wall of the fault F2 continuously performed a ground tilting movement from south to north in the past 40 years. The ground tilting movement not only affected the calculation result of short leveling elevation difference,but also affected the calculation result of two para...