4 Wulff net projection(lower hemisphere)for tectonic stress tensors of early Quaternaryin area from the Haiyuan-Luipanshan fault zone to the Yinchuan fault-depression.

• 标题： 图4海原、六盘山断裂带至银川断陷之间第四纪早期构造应力张量赤平投影(下半球) Fig.