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提起珍珠,人们自然会想到产于珠母贝或珠蚌中熠熠生辉的珍珠。而本文将谈及的“珍珠”却是产于地壳中的“珍珠”——河南省信阳上天梯珍珠岩矿,她是我国最大的一颗“珍珠”。共已探明的储量就近一亿吨,其远景储量就更可观。这颗“珍珠”是火山这个“能工巧匠”铸造出的,它在铸造“珍珠”的同时还为我们留下其他一些地质奇观。信阳上天梯珍珠岩矿,位于信阳县和罗山县交界处,方圆几十里。矿区分布着十多个大小不同的珍珠岩矿体,最大的矿体长为1400米,宽为800米,厚度一般为60米,最厚的地方达102米。它们象一个个聚宝盆。在一亿年前后的白垩纪,那里分布着一个个的洼地和沟谷。由于地球的内力作用,发生了火山爆发。开始喷溢的是中酸性
When you bring a pearl, people naturally think of pearls that are shining in pearl oysters or pearl clams. The “pearl” that this article will deal with is the “pearl” produced in the crust - the Shangtianti perlite mine in Xinyang, Henan Province. She is the largest “pearl” in China. Nearly 100 million tons have been proven reserves, its long-term reserves are even more impressive. This “pearl” was cast by a volcano, a “craftsman,” that casts some “gems of pearls” while leaving us with some other geological wonders. Xinyang Shangtianti perlite mine, located in Xinyang County and the junction of Luoshan County, a radius of dozens of miles. There are more than a dozen of perlite ore bodies of different sizes distributed in the mining area. The largest ore body is 1,400 meters in length and 800 meters in width with a thickness of 60 meters and the thickest part is 102 meters. They are like cornucopias. During the Cretaceous period of 100 million years ago, there were several depressions and valleys. Due to the internal forces of the Earth, a volcanic eruption occurred. The beginning of the overflow is acidic