摘要
我国的华北和西北是世界上黄土分布最广、厚度最大、类型最为复杂的一个地区。鹤壁地区的黄土是它的一部份,属中、晚更新世的次生黄土层。一般呈灰黄、红黄、棕褐色,计有四个亚类。黄土中的矿物成分比较复杂,重矿物有16种,以角闪石、绿帘石、褐铁矿为主;主要轻矿物有石英、长石、方解石等,其中以石英、长石含量最高,占总量的50％±;粘土矿物主要为水云母、蒙脱石、高岭石、绿泥石等,占置一般在30％±。黄土中的粗碎屑成分含量极少,粒度分布均匀。同样各类黄土的化学成分亦相应稳定。
The Northern and Northwestern areas of China are the places where loess is of most extensive distribution, and biggest thickness and a great diversity of types in the world. Loess in Hebi district where is a part of abovementioned areas is a kind of secondary loess beds of middle-later Pleistocene Epoch It's grey-yellow, red-yellow and brown incolor, and also can beclassified four types. Mineral composition in loess is more complicated. There are 16 types of heavy minerals and amphibole, epidote, limonite occupy the first place. The main light minerals are quartz, feldspar, calcite and so on Among them, the contents of quartz and feldspar are the highest, account for 50％ of the total. Major clay minerals are hydromica, montmorillonite, kaolitnie, chlorite and soon, generally account for 30％±. There are only a few crude clasts in loess and their grain size distribution is uniform. Chemical composition of each loess is also correspondingly steady.
出处
《建材地质》
1989年第4期17-21,38,共6页
