利用变形花岗岩体中的长石矿物进行有限应变测量初探
The study of the limit deformation measurement with deformation feldspar in granite areas
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摘要: 岩石有限应变测量的方法较多,相比之下,"长短轴法"最简单、快捷,野外易于操作,但是对所选的对象变形前要求近圆形,或者椭圆形,且随机分布。花岗岩区很难找到满足此条件的颗粒。在《1:25万玉门镇幅》调研的过程中,试以长石颗粒为研究对象,进行长短轴法变形测量,将其结果与相邻变形砾石、杏仁体和包体测量结果进行对比,发现它们具有相似的应变椭圆轴率,证实在变形花岗岩区可以用变形长石颗粒研究区域变形的特点。Abstract: Long-short axis is one of the most simple,prompt and operational methods among the limited deformation methods in outdoors. It requires studies as acircul arsection or circul arsection of strainellip soid and normal distribution before their deformations. But it is difficult to find the criterion particle in granite areas.In the 1:250000 regional geological mapping of Yumenzhen,the authors studied deformation feld spar by long-short axis measurement method,compared with the deformation gravel, deformation amygdale,deformation relict long-short axis measurement,then found the both mea surements were similar to deformation axis. It has been proved that deformation feld spar can be studied as to an area deformation cha racteristic of Yumenzhen1
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Key words:
- deformation feld spar /
- long-short axis /
- limited deformation
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