辽宁本溪地区铁矿三维地质建模
发布时间：2018-08-14 16:07
【摘要】：本溪地区铁矿资源丰富，但历经多年开采，地表及浅层的铁矿资源逐步减少，开展本溪地区深部地质结构研究，寻找隐伏含铁建造和深部铁矿的任务日趋紧迫。本文在区域地质和地球物理资料的基础上，开展了磁化率三维反演、三维地质建模方法及铁矿体三维建模等方面的研究工作，结合钻孔数据，通过三维磁化率反演揭示了大台沟铁矿体和思山岭铁矿的三维几何形态，构建了大台沟铁矿和思山岭铁矿体的三维几何形态模型。思山岭铁矿体的三维几何形态总体呈向上弯曲状，矿体底界最大埋深为1560米，总体走向为北西向，在北西方向有一个延伸的磁性体。大台沟铁矿磁性体的三维几何形态呈保龄球状，总体走向为北西向，倾向南西，近乎直立，沿走向长约5公里。磁性体中部隆起，向北西和南东方向倾伏，，宽度变化范围为600-1200m，磁性体宽度超过1100m的磁性体顶界埋藏深度界于1100米至1200米之间，底界埋深约为4400米。磁性体的走向、倾向以及宽度均与钻孔资料相符。 褶皱和韧性剪切作用是控制铁矿体三维几何形态的两个主要因素。思山岭铁矿体呈“元宝”状，其形态主要受褶皱构造所控制；大台沟铁矿呈“板状”三维几何形态，推测其形态主要受韧性剪切作用控制。隆升剥蚀、岩浆侵入对铁矿体的三维几何形态起破坏与改造作用。
[Abstract]:Benxi area is rich in iron ore resources, but after many years of mining, surface and shallow iron ore resources are gradually reduced. It is increasingly urgent to study the deep geological structure of Benxi area and to find hidden iron-bearing formations and deep iron ores. On the basis of the regional geological and geophysical data, this paper has carried out the research work of 3D inversion of magnetic susceptibility, 3D geological modeling method and 3D modeling of iron ore body, combined with borehole data. The 3D geometry of Datingou iron ore body and sishanling iron ore body is revealed by 3D magnetic susceptibility inversion, and the 3D geometry model of Datingou iron ore body and sishanling iron ore body is constructed. The 3D geometry of the Sishanling iron ore body is generally curved upward, the maximum buried depth of the bottom boundary of the ore body is 1560 meters, the overall strike is NW, and there is an extended magnetic body in the NW direction. The 3D geometry of the magnetic body of Datingou Iron Mine is bowling ball shape, with a general strike of NW and a tendency to the southwest, which is nearly upright, and is about 5 km long along the strike. The central part of the magnetic body is uplifted and tilted northwestward and southeast.The width varies from 600m to 1200 m. The buried depth of the top boundary of the magnetic body over 1100m is between 1100 and 1200 meters, and the depth of the bottom boundary is about 4400 meters. The direction, tendency and width of the magnetic body are consistent with the borehole data. Fold and ductile shear are two main factors controlling the 3D geometry of iron ore body. The shape of Sishanling iron ore body is "Yuanbao", the shape of which is mainly controlled by fold structure, and that of Datingou iron deposit is "plate-like" three-dimensional geometry, which is mainly controlled by ductile shear. Uplift and denudation and magmatic intrusion destroy and reconstruct the three-dimensional geometry of iron ore body.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.31;P628.3
[Abstract]:Benxi area is rich in iron ore resources, but after many years of mining, surface and shallow iron ore resources are gradually reduced. It is increasingly urgent to study the deep geological structure of Benxi area and to find hidden iron-bearing formations and deep iron ores. On the basis of the regional geological and geophysical data, this paper has carried out the research work of 3D inversion of magnetic susceptibility, 3D geological modeling method and 3D modeling of iron ore body, combined with borehole data. The 3D geometry of Datingou iron ore body and sishanling iron ore body is revealed by 3D magnetic susceptibility inversion, and the 3D geometry model of Datingou iron ore body and sishanling iron ore body is constructed. The 3D geometry of the Sishanling iron ore body is generally curved upward, the maximum buried depth of the bottom boundary of the ore body is 1560 meters, the overall strike is NW, and there is an extended magnetic body in the NW direction. The 3D geometry of the magnetic body of Datingou Iron Mine is bowling ball shape, with a general strike of NW and a tendency to the southwest, which is nearly upright, and is about 5 km long along the strike. The central part of the magnetic body is uplifted and tilted northwestward and southeast.The width varies from 600m to 1200 m. The buried depth of the top boundary of the magnetic body over 1100m is between 1100 and 1200 meters, and the depth of the bottom boundary is about 4400 meters. The direction, tendency and width of the magnetic body are consistent with the borehole data. Fold and ductile shear are two main factors controlling the 3D geometry of iron ore body. The shape of Sishanling iron ore body is "Yuanbao", the shape of which is mainly controlled by fold structure, and that of Datingou iron deposit is "plate-like" three-dimensional geometry, which is mainly controlled by ductile shear. Uplift and denudation and magmatic intrusion destroy and reconstruct the three-dimensional geometry of iron ore body.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.31;P628.3
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