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与加拿大地盾苏必利尔地区的太古代金矿床有时空关系的长英质侵入体,由于磁铁矿含量高,因而其磁性均比太古界地带大部分地区所分布的长英质火成岩的磁性高。所见到的例子有赫姆洛、雷德莱克、哈克-霍洛韦、米希比舒湖、沃瓦-米萨纳比、杰拉尔顷、马塔奇文和布斯凯-东马拉蒂克金矿区。这些太古代侵入体可与伴有金属矿化的显生宙磁铁矿系列深成岩体和产有富金斑岩型矿床且富含磁铁矿的侵入体相比。有证据表明,涉及特殊岩浆生成的金矿化发生在一特殊的构造环境中。两者的关系不是表明成矿组分来自这些侵入体,就是表明岩浆是沿扩容带(扩容带也提供了来自深部的流体)侵位的。鉴别富含磁铁矿的长英质侵入体可能有助于确定有利的太古代金矿床勘探区。
The felsic intrusions, which have spatio-temporal relationships with Archean gold deposits in the Superior Belt, Shields, Canada, have higher magnetism than the felsic igneous rocks distributed in most parts of the Archean Belt due to the high magnetite content. Among the examples that have been seen are Helmro, Red Lake, Huck-Holloway, Mchiby Lake, Vowa-Misannibal, Gerard aree, Matakivi and Busqui-East Malaysia Ladick gold mine area. These Archean intrusions can be compared with the deep magmatic series of deep-plutonic rocks associated with metallogenic magnetite and the magnetite-rich intrusions with gold-rich porphyry deposits. There is evidence that gold mineralization involving the formation of special magmas occurs in a special tectonic setting. The relationship between the two is not to indicate that the metallogenic components originate from these intrusions, indicating that the magma invaded along the dilatant zone (the dilatancy zone also provided fluid from the deep). Identification of long-magmatic intrusions rich in magnetite may help identify favorable Archean gold deposit exploration areas.