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概述河南桐柏地区有许多煌斑岩脉,它们广泛地分布于该区所有的古生代变质杂岩系中,且和该地产的正长岩类关系密切。脉体规模大小不一,宽自几十厘米至十多米,长几米至百余米。多呈北东向分布,也有北西向者。和围岩界限清楚,一般斜切区域片理方向,产状陡直。可有冷却边发育(图1)。对围岩可有不太明显的热力变质影响。
Summary There are many lamprophyre dikes in the Tongbai area of Henan Province. They are widely distributed in all the Paleozoic metamorphic complex series in the area and are closely related to the synoptic rocks of the property. Veins vary in size, width from tens of centimeters to more than 10 meters, a few meters to a hundred meters long. Mostly north-east distribution, there are also North West. And clear boundary of the surrounding rock, general beveling area management direction, steep appearance. Can have cooling side development (Figure 1). On the surrounding rock may have less obvious thermal deterioration.