Continental crust rocks can be grouped into three petrochemical, systems, i.e.,oxygen-poor, transitional, and oxygen-rich system, which are intimately related to the intensity of crustal movement. Stable areas in the ...Continental crust rocks can be grouped into three petrochemical, systems, i.e.,oxygen-poor, transitional, and oxygen-rich system, which are intimately related to the intensity of crustal movement. Stable areas in the crust are characterized by rocks of oxygen-poor system, while rocks of oxygen-rich system are typical of active regions.Rocks of the transitional system form all gradations between the two systems Parallel to the orogenic cycle in crustal movement an evolutionary cycle from low to high oxygen content can always be recognized with respect to rocks in each system. On the other hand, with regard to rocks of the same type in the same petrochemical system, apart from the influence of crustal movement intensity, a tendency of increasing oxygen content with decreasing orogenic age is noticeable. As a region changes from active into gradational geologically, oxygen content is found decreasing for rocks of the same type,or vice versa. In this context, new implications may be attached to studies on petrochemical system : (1) A“family tree” can be established for rocks, thus sheding light on their evolutionary hlstoryand geneses (2)To provide information on the intensity of crustal movement, i.e., the tectonic nature for the studied area at the time of magma generation, and (3) To aid in determining petrogenetie age of magmatic rocks and in making geological divisions.展开更多
大多数内生金属矿床成矿作用与花岗岩关系密切(Chen et al.,1989;洪大卫,1994),尤其是稀土元素、铀矿床等均与复式岩体晚期岩体(包括浅色花岗岩与伟晶岩)成岩作用关系密切。因此,厘清花岗岩复式岩体演化过程中的稀土元素演化,对认识花...大多数内生金属矿床成矿作用与花岗岩关系密切(Chen et al.,1989;洪大卫,1994),尤其是稀土元素、铀矿床等均与复式岩体晚期岩体(包括浅色花岗岩与伟晶岩)成岩作用关系密切。因此,厘清花岗岩复式岩体演化过程中的稀土元素演化,对认识花岗岩类演化过程中相应金属矿床的成矿作用等方面具有重要的理论意义。根据岩石熔化实验结果,在岩石熔化过程中。展开更多
文摘Continental crust rocks can be grouped into three petrochemical, systems, i.e.,oxygen-poor, transitional, and oxygen-rich system, which are intimately related to the intensity of crustal movement. Stable areas in the crust are characterized by rocks of oxygen-poor system, while rocks of oxygen-rich system are typical of active regions.Rocks of the transitional system form all gradations between the two systems Parallel to the orogenic cycle in crustal movement an evolutionary cycle from low to high oxygen content can always be recognized with respect to rocks in each system. On the other hand, with regard to rocks of the same type in the same petrochemical system, apart from the influence of crustal movement intensity, a tendency of increasing oxygen content with decreasing orogenic age is noticeable. As a region changes from active into gradational geologically, oxygen content is found decreasing for rocks of the same type,or vice versa. In this context, new implications may be attached to studies on petrochemical system : (1) A“family tree” can be established for rocks, thus sheding light on their evolutionary hlstoryand geneses (2)To provide information on the intensity of crustal movement, i.e., the tectonic nature for the studied area at the time of magma generation, and (3) To aid in determining petrogenetie age of magmatic rocks and in making geological divisions.
文摘大多数内生金属矿床成矿作用与花岗岩关系密切(Chen et al.,1989;洪大卫,1994),尤其是稀土元素、铀矿床等均与复式岩体晚期岩体(包括浅色花岗岩与伟晶岩)成岩作用关系密切。因此,厘清花岗岩复式岩体演化过程中的稀土元素演化,对认识花岗岩类演化过程中相应金属矿床的成矿作用等方面具有重要的理论意义。根据岩石熔化实验结果,在岩石熔化过程中。
