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依据１ ：５０ ０００ 地质填图资料，对天桥沟—黄羊川活动断裂带晚更新世以来的几何学和运动学特征进行了详细的论述．认为该断裂带可分为逆走滑（ 左旋） 的天桥沟断裂段和正走滑（ 左旋） 的黄羊川断裂段，其主要活动时期是晚更新世，滑动速率为４ ～５ ｍ ｍ／ａ ．全新世早期，该断裂带活动强度逐渐减弱，其最后一次活动的时间为距今０ ．７５９ ×１０４ ～１ ．０２ ×１０４ 年
Based on 1: 50000 geological mapping data, the geometric and kinematic characteristics of the Tianqiaogou-Huangyangchuan active fault zone since the late Pleistocene are discussed in detail. It is considered that the fault zone can be divided into reverse strike-slip (left-lateral) Tianqiaogou fault zone and strike-slip (left-wing) Huangyangchuan fault segment. The main activity period is late Pleistocene with a sliding velocity of 4 ~ 5 m m / a . In the early Holocene, the activity intensity of the fault zone gradually weakened, and its last activity time was 0. 759 × 104 ~ 1. 02 × 104 years