摘要
本文简要叙述了关岭县新铺地区晚三叠世瓦窑组下部含锰层位及其铁锰结核产出的地质背景和宏观特征 ,并较详细地论述它的地球化学特征。认为该铁锰结核有别于现代大洋沉积的铁锰结核或铁锰结壳 ,是Mn和Fe含量中等、Mn∶Fe >1、富LREE、贫多金属的复合成因铁锰结核 。
This paper briefly deals with geological setting and macro_characteristic of Mn_bearing sediments and occurrence of ferromanganese nodule at the lower part in Wayaobao formation of upper Triassic in Xinpu district of Guanlin county of Guizhou, comparatively gives full details of its geochemical characteristic. It is su_gested that this kind of ferromanganese nodule differs from manganese nodule or ferromanganese nodule crust deposited in modern ocean. As ferromanganese nodule of compound origin contains Mn and Fe in medium scale, Mn:Fe>1, rich LREE and poor multi_metals, it would be a Fe_Mn sediments of lower thermal water origin that forms in the late weather eluviation. [
出处
《贵州地质》
2001年第1期7-11,共5页
Guizhou Geology
关键词
瓦窑组
铁锰结核
热水沉积
风化淋滤
贵州
地球化学特征
微量元素
Wayao formation
ferromanganese nodule
deposition of thermal water
weather eluviation
Xinpu of Guanlin
Guizhou
