鲁西石炭、二叠系沉积矿床成矿系列

MINEROGENETIC SERIES OF THE CARBONIFEROUS AND PERMIAN SEDIMENTARY DEPOSITS IN WESTERN SHANDONG

石炭、二叠系是我国主要含煤地层,它广泛分布于鲁西隆起区。该区上石炭统由本溪组和太原组组成,二叠系下统由山西组和下石盒子组组成,二叠系上统由上盒子组组成。石炭系和二叠系划分出五个成矿系列。本溪组成矿系列主要有 G 层铝土矿,其次是山西式铁矿、硬质耐火粘土矿、软质耐火粘土矿和伴生镓元素。太原组成矿系列主要有煤,其次是膨胀粘土矿、陶瓷“大同土”。山西组成矿系列主要有煤,其次是膨胀粘土矿、菱铁矿。石盒子组万山段成矿系列主要有 A 层硬质耐火耐土矿和铝土矿,其次是铝土矿中伴生镓,石盒子组奎山段成矿系列主要有石英砂岩。这些矿床应归属于“滨海相→滨海沼泽相→内陆沼泽相→内陆湖泊相→内陆河湖相的化学→碎屑岩建造沉积成矿系列”。

The Carboniferous and Permian systems are the main coal-bearing strata in China,and widespread in the Western Shandong Uplift.The Upper Carboniferous series is Composed of Benxi and Taiguan formations,while the Lower Permian series,of Shanxi and Lower Shihezi formations,and the Upper Permian series,of Upper Shihezi Formation. Carboniferous and Permian systems can be divided into five minerogenetie series.The minerogenetic series of the Benxi Formation mainly includes G-bed bauxite,followed by Shanxi -type iron ores,stiff fireclay,soft fireclay,and associated gallium elements.The minerogenetic series of the Taiyuan Formation mainly includes coal beds,followed by expanded clay,Datong- type ceramic clay.The minerogenetic series of the Shanxi Formation mainly includes coal beds, followed by expanded clay and siderite.The minerogenetic series of the Wanshan member in Upper Shihezi Formation includes A-bed stiff fireclay and bauxite,together with associated gallium elements in bauxite.The minerogenetic series of the Kuishan member in the Upper Shihezi Formation mainly includes quartz sandstones. These mineral doposits should be designatecl to the sedimentary minerogenetic series of chemical-detrital rock formations in the littoral→littoral marsh→continental swamp→ continental locustrine→continental fluviolocustrine facies.