沉积矿床多因素多阶段成矿论  

COMPOSITE-PROCESS AND POLY-EPISODIC ASPECT OF THE CHINESE SEDIMENTARY MINERAL DEPOSITS

作　　者：叶连俊[1] 陈其英[1] 

机构地区：[1]中国科学院地质研究所

出　　处：《地质科学》1989年第2期109-127,共19页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家自然科学基金

摘　　要：沉积矿床不是海水直接沉淀的产物,而是多因素多阶段复杂过程的产物,工业矿床是最后阶段物理富集的产物。沉积成矿受沉积环境及地质背景的制约,它们左右着矿床的时空展布规律。造山、造陆特别是造海运动左右着成矿域、带的展布和结构,导致不同的成矿过程和成矿模式。在浪基面以上形成具碎屑结构的层状矿床,在浪基面以下,经深埋成岩作用形成成岩矿床和由变热了的承压的含矿地层水入侵而形成的层控矿床。Genesis of sedimentary mineral deposits can not be derived directly by any kind of simple chemical reactions, but were products of a complex procedure through composite-process and poly-episodic generations. The procedure were not just evolutionary, but also revolutionary in nature. Metallogenic process is really constrained collectively through materialistic process, sedimentary environment, and geological background. The going-on of the whole procedure were governed by both effects of sedimentary, geochemical, biogeochemical, organic geochemical, paleo-climatical, geologic-physical as well as properties of the relevant earth crust segment, their structural making up and tectonic mobility.Sedimentary mineral deposit is nothing but a special kind of sedimentary facies, of a definite sedimentary assemblage, Different genetic types of mineral deposits and different ore associations charaterize different sedimentary assemblages, different ore-forming belt or territory.Crustal movement, including orogenic movement, epeirogenic movement, as well as eustatic movement, controls the formation and distribution of all kinds of sedimentary mineral deposits. Epeirogenic movement of local occurrence usually deviate the general distribution pattern of the mineral deposits. The influence of eustatic movement is likely more sensitively effective. Most kinds of sedimentary mineral deposits occur preominantly within the transgression frontal belt and lower part of marine transgressive sedimentary series.Mineral deposits can not be precipitated directly from sea water, but were products of terrestrial imbibition, biological enrichment and pore water concentration instead. Above the wave base, in the inner continental shelf, where the dynamic condition of the sea water is strong, mineral deposits that were formed under the recycling sedimentary regime up there, are predominantly clastic in texture and well bedded in structure. They are largely huge industrial deposits. Where as below the wave base, in the outer continental shelf env

关 键 词：沉积矿床 成矿因素 成矿阶段 

分 类 号：P611.22[天文地球—矿床学]