牛圈银矿是冀北地区重要的独立型银矿床。对牛圈银矿床流体包裹体研究发现,矿石中的石英中主要发育富气包裹体、富液包裹体和含液态CO2等3种类型的原生包裹体。各类包裹体均一温度为230℃-310℃,盐度平均为3.65 w t%N aC l,密度为0.701-...牛圈银矿是冀北地区重要的独立型银矿床。对牛圈银矿床流体包裹体研究发现,矿石中的石英中主要发育富气包裹体、富液包裹体和含液态CO2等3种类型的原生包裹体。各类包裹体均一温度为230℃-310℃,盐度平均为3.65 w t%N aC l,密度为0.701-0.925g/cm^3。矿床属于浅成低温热液型矿床。研究还表明,混合作用和沸腾作用在成矿阶段可能同时存在。这种新认识对于进一步的研究和找矿工作都有一定的指导意义。展开更多
Igneous rocks in the South China Sea have broad prospects for oil and gas exploration.Integrated geophysical methods are important approaches to study the distribution of igneous rocks and to determine and identify ig...Igneous rocks in the South China Sea have broad prospects for oil and gas exploration.Integrated geophysical methods are important approaches to study the distribution of igneous rocks and to determine and identify igneous rock bodies.Aimed at the characteristics of gravity and magnetic fields in the South China Sea,several potential field processing methods are preferentially selected.Reduction to the pole by variable inclinations in the area of low magnetic latitudes is used to perform reduction processing on magnetic anomalies.The preferential continuation method is used to separate gravity and magnetic anomalies and extract the gravity and magnetic anomaly information of igneous rocks in the shallow part of the South China Sea.The 3D spatial equivalent distribution of igneous rocks in South China Sea is illustrated by the 3 D correlation imaging of magnetic anomalies.Since the local anomaly boundaries are highlighted gravity and magnetic gradients,the distribution characters of different igneous rocks are roughly outlined by gravity and magnetic correlation analysis weighted by gradient.The results show the distribution of igneous rocks is controlled and influenced by deep crustal structure and faulting.展开更多
文摘牛圈银矿是冀北地区重要的独立型银矿床。对牛圈银矿床流体包裹体研究发现,矿石中的石英中主要发育富气包裹体、富液包裹体和含液态CO2等3种类型的原生包裹体。各类包裹体均一温度为230℃-310℃,盐度平均为3.65 w t%N aC l,密度为0.701-0.925g/cm^3。矿床属于浅成低温热液型矿床。研究还表明,混合作用和沸腾作用在成矿阶段可能同时存在。这种新认识对于进一步的研究和找矿工作都有一定的指导意义。
基金the National 863 Projects(Nos.2006AA06Z111,2006AA06201-3,and 2006AA09A101-3)National Special Project(No.SinoProbe-01-05)Open Project of the National Key Laboratory for Geological Processes and Mineral Resources(No.GPMR0942).
文摘Igneous rocks in the South China Sea have broad prospects for oil and gas exploration.Integrated geophysical methods are important approaches to study the distribution of igneous rocks and to determine and identify igneous rock bodies.Aimed at the characteristics of gravity and magnetic fields in the South China Sea,several potential field processing methods are preferentially selected.Reduction to the pole by variable inclinations in the area of low magnetic latitudes is used to perform reduction processing on magnetic anomalies.The preferential continuation method is used to separate gravity and magnetic anomalies and extract the gravity and magnetic anomaly information of igneous rocks in the shallow part of the South China Sea.The 3D spatial equivalent distribution of igneous rocks in South China Sea is illustrated by the 3 D correlation imaging of magnetic anomalies.Since the local anomaly boundaries are highlighted gravity and magnetic gradients,the distribution characters of different igneous rocks are roughly outlined by gravity and magnetic correlation analysis weighted by gradient.The results show the distribution of igneous rocks is controlled and influenced by deep crustal structure and faulting.
