李采一. 大别山北麓岩浆岩成因划分及找矿方向[J]. 地质通报, 1985, (3): 133-141.
    引用本文: 李采一. 大别山北麓岩浆岩成因划分及找矿方向[J]. 地质通报, 1985, (3): 133-141.
    LI Cai-yi. GENETIC CLASSIFICATION OF MAGMATIC POCKS AND DIRECTION IN ORE PROSPECTING AT THE NORTHERN FOOT OF THE DABIE MOUNTAINS[J]. Geological Bulletin of China, 1985, (3): 133-141.
    Citation: LI Cai-yi. GENETIC CLASSIFICATION OF MAGMATIC POCKS AND DIRECTION IN ORE PROSPECTING AT THE NORTHERN FOOT OF THE DABIE MOUNTAINS[J]. Geological Bulletin of China, 1985, (3): 133-141.

    大别山北麓岩浆岩成因划分及找矿方向

    GENETIC CLASSIFICATION OF MAGMATIC POCKS AND DIRECTION IN ORE PROSPECTING AT THE NORTHERN FOOT OF THE DABIE MOUNTAINS

    • 摘要: 一、概述大别山为昆仑—秦岭褶皱带南延东段,地处祖国心脏,是鄂、豫、皖三省连接之天然屏障。其由西向东,山峦重叠,连绵不断,形成了我国南北两大地质构造单元的分界带,带的两侧历来被地质界认为具有不同的古地理,古气候,古生物群,岩石组合及特征矿产。在大别山地区,西起京广线,经河南商城至安徽金寨一带岩浆活动频繁,从杨子期到燕山期岩浆岩分布十分广泛,而以侵入岩最为发育,岩体大小计有100余个,总面积约3200

       

      Abstract: In the paper the genetic mechanism and genetic types of magmatic rocks at the northern foot of the Dabie Mountains are dissusced through studies of their mode of occurrence, petrology, petrochemistry, accessory minerals in the artificial heavy fractions, isotope geochemistry, relations of their distribution to plate tectonics and ore potentiality of various rock types. The the direction in ore prospecting is pointed out. In discussing the above-mentioned problems, the mode of occurrence, distridution and petrological characteristics of various rock types are regarded as the basis. Typical rock masses were selected to make mathmatical statistics in respects of petrochemistry, accessory minerals in aritficial heavy fractions, isotopic ages and ore potentiality. On this basis, by use of new theories and methods and in combination with an analysis of the structural setting and temporal and spatial relations of distribution between magmatic rocks of various ages in the area, a reasonable genetic classification is proposed for the magmatic rocks in the area. The auhtor considers that the magmatic rocks in the area are mainly of crustal anatectic crystallizationintrusion type (70%), magmatic crystallization contaminaation type (28%)and mantle-derived type (2%).

       

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