华北石炭二叠纪聚煤区西部含铵伊利石—粘土岩夹矸的研究

Ammonium-bearing illite in Tonsteins of Permo-Carboniferous coal accumulation area of Northern China

含铵伊利石粘土岩夹矸较广泛分布于华北石炭二叠纪聚煤区西部太原组、山西组煤层中,可划分为6种岩石类型。X-射线衍射分析结果表明铵伊利石均为1M多型。铵伊利石多由高岭石、少量由沉积伊利石转化形成,也可见沿节理裂隙呈细脉状产出的自生铵伊利石。NH4+离子主要来源于成煤植物及有机质中蛋白质的降解作用,也可能来源于与岩浆活动有关的热水溶液。研究表明,在煤层封闭的粘土岩夹矸中,高岭石、沉积伊利石向铵伊利石转化是成岩转化的基本模式。

Ammonium-bearing illite tonsteins, which occur widely in Taiyuan and Shanxi Formations of the PermoCarboniferous coals in west of Northern China, can be divided into six rock types. ing illites are I Mpolytype. It is mainly transformed from kaolinite and seldom from XRD shows that ammonium-bearsedimentary illites. Some autogenetic ammonium illites were found in the cracks. NH4 ^＋ mainly came from the degradation of protein in the organic matter, or possibly from the thermal solution related to magmatic activity. Research shows that the transformation of kaolinite and illite to ammonium-bearing illite is the basic diagenetic transformation mode. The enrichment of ammonium-beating illite is also located in the area where the coal gas is abundant, so ammonium-illites can be acted as the trace mineral for coal gas.