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发育在寒武系中上统娄山关群白云岩(∈_(2-3)ls)或奥陶系下统桐梓组白云岩夹富钾水云母粘土岩(O_1t)古侵蚀面之上,二叠系下统栖霞组石灰岩(P_1q)之下的遵义、息烽、开阳含铝岩系,广布于乌江两岸,是黔中南部(清镇、修文)铝土矿的北延部分。它们是一套延续而不可分割的岩石地层单位统一体,其时代经近年研究已初步划定为早石炭世大塘早期。乌江以北遵义县境内的含铝岩系(或简称矿系),其特征元素除通常公认的Al、Si、Fe、Ti之外,常含有丰度较高的S元素和一定的有机质,并构成了相应的高硫及富炭铝土矿。S元素常以黄铁矿这一矿物形式,比较集中地分布于矿系下段底部粘土岩及上段铝土矿中,形成可供工业开采利用的黄铁矿矿床和出现严重影响炼铝工艺流程的高硫铝土矿床(体)。矿系顶部炭质页岩—煤线—劣质煤组合中,亦见有黄铁矿偏集分布,同时,在矿系底板桐梓组泥质白云岩中,在顶板栖霞组石灰岩中,均可见到黄铁矿零星分布,并于局部地段富集。因此,S元素是纵贯含铝岩系及其顶、底板地层的又一特征元素。
Developed over the Paleocene Loushanguan Group dolomite (∈_ (2-3) ls) or paleo-erosion surface of the Ordovician Member Tongzizi dolomite clayey potassium-rich mica clay rock (O_1t) The Zunyi, Xifeng and Kaiyang aluminous rocks beneath the Qixia Formation limestone (P_1q) in the Lower Permian are widely distributed across the Wujiang River and are the northern extension of the bauxite in central and southern Guizhou (Qingzhen, Xiuwen). They are a continuum and indivisible unit of lithostratigraphy unit, and its era has been initially delineated as Early Carboniferous Datang early in recent years. In addition to the generally accepted Al, Si, Fe and Ti, the characteristic elements of the aluminum-bearing rock series (or simply “the mine system”) in Zunyi County, north of the Wujiang River often contain S elements and certain organic matter with high abundance Constitute the corresponding high-sulfur and carbon-rich bauxite. S element often in the form of pyrite mineral, concentrated in the bottom of the lower part of the clay clayey rocks and the upper bauxite, the formation of pyrite deposits for industrial exploitation and the occurrence of a serious impact on the aluminum smelting process High-sulfur bauxite deposit (body). There is also a partial distribution of pyrites in the top coal gangue shale-coal line-low-grade coal assemblage. At the same time, in the muddy dolomite of the Tongzi Formation in the mineralized floor, it can be seen in the limestone of the Qixia Formation in the top plate Pyrite sporadic distribution, and enrichment in some areas. Therefore, the S element is another characteristic element of the stratigraphic layer that runs through the aluminiferous rocks and the top and bottom plates.