新疆和田南部地区岩石磁化率变化特征研究

发布时间：2018-04-10 20:45

本文选题：和田南部地区 + 西昆仑　；参考：《地球科学进展》2016年05期

【摘要】：为配合新疆和田南部地区1∶5万航磁调查工作,掌握该区岩石磁性特征,填补这一地区缺少岩石磁化率资料空白,2013—2015年在该地区开展了区域性岩石磁化率调查工作,完成331处物性点测量,获得有效体积磁化率数据10 256个,采集岩石样品270块。对实测资料进行了详细地分类统计,进一步分析发现该区岩石磁化率主要受岩石中矿物成分、结构以及岩石时空分布影响。中、酸性侵入岩磁化率主要由岩石中黑云母的含量决定,黑云母对中、酸性侵入岩磁化率的贡献要高于其他超顺磁性矿物的贡献。对于相同岩性的岩石磁化率具有沿深大断裂分布的磁化率值高,沿次级断裂分布的磁化率值相对低的空间分布特点和早古生代中、酸性侵入岩磁化率高于晚古生代中、酸性侵入岩的时间分布特点。研究结果为航磁资料解释、地质找矿、构造演化研究提供了重要依据。
[Abstract]:In order to cooperate with the aeromagnetic investigation of 12: 50 000 in southern Hotan, Xinjiang, to grasp the rock magnetic characteristics in this area, and to fill in the lack of rock susceptibility data in this area, a regional investigation of rock susceptibility was carried out in this area from 2013 to 2015.331 physical property points were measured, 10 256 effective volumetric susceptibility data were obtained and 270 rock samples were collected.The detailed classification and statistics of the measured data show that the magnetic susceptibility of rocks in this area is mainly affected by the mineral composition, structure and temporal and spatial distribution of rocks.The magnetic susceptibility of acid intrusive rocks is mainly determined by the content of biotite in rocks, and the contribution of biotite pair to the magnetic susceptibility of acid intrusive rocks is higher than that of other superparamagnetic minerals.For the rock of the same lithology, the magnetic susceptibility distribution along the deep and large faults is high, and the magnetic susceptibility along the secondary faults is relatively low. The magnetic susceptibility of the acid intrusive rocks in the early Paleozoic is higher than that in the late Paleozoic, and the magnetic susceptibility of the acid intrusive rocks is higher than that of the later Paleozoic.Time distribution characteristics of acid intrusive rocks.The results provide important basis for aeromagnetic data interpretation, geological prospecting and tectonic evolution.
【作者单位】：中国国土资源航空物探遥感中心;河北地质大学勘查技术与工程学院;天津华北地质勘查局;
【基金】：国家高技术研究发展计划项目“航空地球物理遥感综合探测技术与解释系统研究”(编号:2013AA063905) 中国地质调查局和天津华北地质勘查局矿业产业援疆项目所属工作项目“新疆和田东三县1∶5万航磁调查”(编号:12120113072800)资助~~
【分类号】：P631.2

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