矿区东部断裂呈弧形弯曲，并作NNW向收敛、SE方向撒开趋势，这些弧形断裂应是一帚状构造。

In the east part of the orefield, the trend of arcual fault is convergent NNW-wards and divergent SE-wards. These arcual faults must be a broomlike structure.

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图2 L5后PLMN 椎体后下缘骨质缺损，其后有弧形骨块双侧断裂并后移，右侧隐窝狭窄、椎管狭窄（略）

Fig. 2 Anterior-posterior border deossification behind L5 of lumbar with PLMN, arcuated bone block was bilateral faulting and palinal, the right crypt and spinal canal were stenotic.

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矿体产出形态及空间分布，严格受近南北向弧形张扭性断裂控制。

The morphology and spacial distribution of the ore body are strictly controlled by the N-S arc-shaped tensional and torsional fractures.

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