中-晚太古代脉型金矿床是世界黄金产量的主要来源之一。这些矿床在特征上有很大变化,但它们部固定地产于镁铁质和超镁铁质火山岩的附近,与古地壳的构造扰动带密切相关,或与“破碎带”共生。可以用安大略和魁北克北部的“破碎带”作模式,提出这种矿床的成因理论。拉德湖“破碎带”是线状构造,宽4英里,延长超过150英里。许多富而大的脉型 The Middle-Late Archean vein-type gold deposit is one of the main sources of gold production in the world. These deposits vary widely in character, but they are fixedly located near the mafic and ultramafic volcanics, closely related to the tectonic disturbance zone of the ancient crust, or symbiotic with the “crustal belt.” We can use the “broken belt” in Ontario and northern Quebec as a model to suggest the genesis theory of this deposit. The Lake Ladd “Broken Belt” is a linear structure that is 4 miles wide and extends over 150 miles. Many rich and big pulse type