本文選題：地震破裂帶 + 酒西盆地��； 參考：《地震地質(zhì)》2016年03期

【摘要】：根據(jù)航、衛(wèi)片解譯和野外實(shí)地考察,在位于祁連山—河西走廊西段的酒西盆地白楊河背斜北發(fā)現(xiàn)1條較新的地震破裂帶遺跡,破裂帶長度約5km,呈弧形展布,保存較為完整,在最新的洪積扇面上陡坎高度約0.5~0.7m,在沖溝T1階地上陡坎高度約1.5m,分析認(rèn)為其為較新的1次地震活動(dòng)所致。沿?cái)鄬佣缚蔡讲坶_挖表明,此次破裂帶形成于約1500aBP,此前斷裂還有過活動(dòng)。根據(jù)該地區(qū)歷史地震資料考證和研究程度,認(rèn)為該地震地表破裂帶可能與365年玉門地震、1785年玉門惠回堡地震或1次漏記的歷史強(qiáng)地震有關(guān)。
[Abstract]:According to navigation, satellite interpretation and field investigation, a relatively new earthquake rupture zone was found in the northern part of the Baiyang River anticline in the western section of the Qilian Mountains and Hexi Corridor, with a length of about 5 km, which is distributed in an arc and is relatively intact.The height of steep ridges is about 0.5 ~ 0.7m on the latest alluvial fan plane and 1.5 m on the ground of T _ 1 step of the gully. It is considered that it is caused by a relatively new earthquake activity.The trench excavation along the fault scarp indicates that the fracture zone was formed at about 1500 ABP, after the fault was still active.Based on the historical seismic data in this area, it is considered that the surface rupture zone of the earthquake may be related to the Yumen earthquake of 365 years, the Huibao earthquake of 1785 or the historical strong earthquake with a missing record.
【作者單位】： 中國地震局蘭州地震研究所;蘭州地球物理國家野外科學(xué)觀測(cè)研究站;
【基金】：國家自然科學(xué)基金(41402186) 中國地震局地震行業(yè)科研專項(xiàng)(201408023)共同資助
【分類號(hào)】：P315.2

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本文編號(hào)：1766479