论文部分内容阅读
辽东地区硼矿床受控于华北地台东北部大石桥-凤城-宽甸古隆起构造带.元古宇辽河群下部里尔峪组含硼岩系呈W-E、NE向、长约350km、宽60km的长条带状展布.硼矿体发育于里尔峪组蛇纹石化镁橄岩或蛇纹石化富镁大理岩中,具有明显的层控和岩控特征.虎皮峪-红石砬子-清河近东西向线状紧密的复式背、向斜间多期次次级的背、向斜发育,表现出明显的塑性变形.硼矿体在走向和倾向上具尖灭膨缩现象.围岩蚀变强烈.大量的电气石化使围岩中硼元素的含量偏高;蛇纹石化镁橄岩或蛇纹石化富镁大理岩的Ca/Mg比值波动极大,表明其与成矿关系十分密切;含硼岩系的厚度与矿体的关系呈正相关性,当厚度超过35m时就有可能成矿,且厚度越大,矿体的规模和矿石质量越好.在部分地区,赋矿的褶皱构造完全倒转,有里尔峪组的层序倒转,混合岩段反转至上部,且混合岩化明显增强,形成混合岩化花岗岩,而其下部250～600m是含硼岩系,发育优质隐伏硼矿.据辽东地区硼矿体的这些特征,推测了4个成矿远景区.
The boron deposits in the Liaodong area are controlled by the Dashiqiao-Fengcheng-Kuandian paleohigh structural belt in the northeastern North China Platform, and the boron-bearing rock series of the Lilleyu Formation in the lower part of the Lvhe Group in the Proterozoic are in the WE and NE directions with a length of about 350km and a width of 60km .Borite orebody is developed in the serpentinite magnesian or serpentine magnesian marble in Lilleu group, and has obvious stratigraphic control and rock control characteristics. - Qinghe nearly linear complex between the east and west back to the syncline between the multi-stage secondary back and syncline development, showing obvious plastic deformation. Boron ore body in the trend and tendencies with a sharp expansion and contraction phenomenon. Rock eroded strongly, and a large amount of electrochemistry made the content of boron element in the surrounding rock high. The ratio of Ca / Mg in serpentiniferous mafirite or serpentine-rich magnesium-rich marble fluctuated greatly, Closely related to the relationship between the thickness of the boron-bearing rock series and the ore body, when the thickness of more than 35m may be mineralized, and the greater the thickness, the ore body size and ore quality is better.In some areas, ore-bearing The fold structure is completely reversed, and the sequence of the Lille formation reverses to the upper part, and the mixed rock formation is obviously enhanced. Into a mixed granitic granite, while the lower part of 250 ~ 600m is a boron-bearing rock series, the development of high-quality hidden boron ore.Based on these characteristics of boron ore body in Liaodong area, we speculate that 4 metallogenic prospect.