夏天总是我们地质科学工作者的黄金季节。前不久,我们一行十几人从某地分乘三辆吉普车,向内蒙古草原进发。根据资料推断,四亿年前存在的“古亚洲洋”应该在北纬42°线以北。从张家口——集宁一线北行二、三百华里,即可到达。该线以北,传统构造地质学叫地槽区,以南称为地台区。许多金属矿产沿着这条线两侧有规律地分布。最近一些年,这一带发现不少证据,证明在古生代时期,该线以北不但是夹在西伯利亚和中国地块之间浩瀚烟波的古亚洲洋,而且也是巨大的古板块的会聚带。盛夏,我们这个考察小组的吉普车,在莽莽的草原上已经奔驰了一个多月,来到“风吹草低见牛羊”的锡林浩特草原,实在令人陶醉。当车子驶到了温都尔庙(听说电影“祖国啊,母亲”外景就是在 Summer is always the golden season for our geosciences. Not long ago, we had a dozen or so people traveling from one place to three jeeps and proceeded to the grassland in Inner Mongolia. According to the data, the “ancient Asian oceans” that existed 400 billion years ago should be north of the 42 ° north latitude. From Zhangjiakou - Jining first line northbound two, three hundred Huari, you can reach. The north of the line, the traditional tectonics geology is called the trough area, and the south is called the platform area. Many metal minerals are regularly distributed along both sides of this line. In recent years, there has been much evidence in this area that during the Paleozoic, the north of the line was not only the ancient Asian Ocean sandwiched between vast expanses of snow between Siberia and the Chinese massif, but also a converging belt of huge ancient plates. In midsummer, the jeep of our inspection team, having been on the vast grassland for more than a month, came to a remembrance of the Xilinhot grassland where the wind and the wind came down. When the car drove to Wintour Temple (I heard the movie “Motherland ah, Mother ” is just outside