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我们把产在昆仑山—阿尔金山一带的,以镁质白云石大理岩受接触交代而生成的各色软玉,统称为“和田玉”(狭义)。中元古界蓟县系或下元古界长城系的镁质白云石大理岩是形成和田玉的围岩;华力西晚期中—酸性岩体为成矿的侵入岩;在侵入岩顶部的围岩受接触交代而成为矿化带,在断裂上盘的合适部位形成和田玉矿床。目前,有关和田玉成矿规律方面的文章很少,而且提及到长城系、蓟县系成矿机理的内容几乎没有,注重探讨上述问题,供广大和田玉学者参考。
We refer to the various nephrite jade produced in contact with the magnesian dolomite marble along the Kunlun Mountains - the Altun Mountains, collectively referred to as “Hetian jade” (narrow sense). The magnesian dolomite marble in the Middle Proterozoic Jixian or the Great Paleozoic Great Wall line is the surrounding rock forming Hetian jade; the middle-late Variscan medium-acidic rock intrusive rocks are metallogenic intrusions; at the top of intrusive rocks Rocks are contacted and interpreted as mineralized zones, forming the Hetian jade deposit at the appropriate site of the upper fault. At present, there are few articles on the law of Hetian jade mineralization, and there are few references to the mechanism of the mineralization in the Great Wall and Jixian, focusing on the above issues for reference by the majority of Hetian jade scholars.