马角坝地区矿床地质特征及沉积演变
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摘要
在开展马角坝地区矿床成矿地质背景、地质条件、矿体特征、矿物组分等方面研究基础上,以沉积学研究为基础,运用地层追索和横向对比的方法,对龙门山马角坝地区出露的从寒武世至三叠世沉积出露的19套地层的矿床地质特征进行列述,并结合威尔逊模式划分各个地层的沉积相带,反映寒武世以来该地区的沉积序列的演变,对于古环境并根据沉积环境反其特征,从而构建了一个模型以便于进行下一步的精准层序地层分析。通过总结成矿因素与地质特征,认为沉积分异作用形成的硅铁建造为成矿的矿源层,区域变质作用使含矿地层内金元素进行迁移与初步富集形成矿体。
On the basis of research on metallogenic geological background, geological conditions, orebody characteristics and mineral composition of the deposit in Majiaoba area, based on sedimentology, the method of stratigraphic tracing and horizontal correlation is used. The geological characteristics of 19 sets of strata exposed from Cambrian to Triassic in Majiaoba area, Longmen Mountain, are described, and the sedimentary facies belts of each stratum are divided according to Wilson model. Reflecting the evolution of sedimentary sequence in this area since Cambrian, a model is constructed for accurate sequence stratigraphic analysis of the next step for paleoenvironment and depositional environment. By summing up the metallogenic factors and the ground It is considered that the ferrosilicon formation formed by the sedimentary differentiation is the ore-forming source bed, and the regional metamorphism causes the gold elements in the ore-bearing strata to migrate and initially enrich to form the ore-body.
On the basis of research on metallogenic geological background, geological conditions, orebody characteristics and mineral composition of the deposit in Majiaoba area, based on sedimentology, the method of stratigraphic tracing and horizontal correlation is used. The geological characteristics of 19 sets of strata exposed from Cambrian to Triassic in Majiaoba area, Longmen Mountain, are described, and the sedimentary facies belts of each stratum are divided according to Wilson model. Reflecting the evolution of sedimentary sequence in this area since Cambrian, a model is constructed for accurate sequence stratigraphic analysis of the next step for paleoenvironment and depositional environment. By summing up the metallogenic factors and the ground It is considered that the ferrosilicon formation formed by the sedimentary differentiation is the ore-forming source bed, and the regional metamorphism causes the gold elements in the ore-bearing strata to migrate and initially enrich to form the ore-body.
引文
[1]徐彬,张华松,陈建平,等.贵州旦坪铝土矿矿床地质特征及成因探讨[J].桂林理工大学学报,2017,37(4):570-579.
[2]张帮禄,冯京,徐仕琪,等.西昆仑玛尔坎苏地区奥尔托喀讷什大型碳酸锰矿床地质特征及成因探讨[J].地质论评,2018,64(2):361-377.
[3]郑梦天,张连昌,朱明田,等.西昆仑喀来子钡-铁矿床地质特征、时代及成因探讨[J].地学前缘,2016,23(5):252-265.
[4]南怀方.东风山金矿床地质特征及成因探讨[J].有色金属工程,2018,8(1):93-97.
[5]高超,曹养同,刘成林,等.塔里木盆地西南凹陷古新统巨厚海相石膏岩沉积特征及环境意义[J].矿床地质,2016,35(6):1217-1229.
[2]张帮禄,冯京,徐仕琪,等.西昆仑玛尔坎苏地区奥尔托喀讷什大型碳酸锰矿床地质特征及成因探讨[J].地质论评,2018,64(2):361-377.
[3]郑梦天,张连昌,朱明田,等.西昆仑喀来子钡-铁矿床地质特征、时代及成因探讨[J].地学前缘,2016,23(5):252-265.
[4]南怀方.东风山金矿床地质特征及成因探讨[J].有色金属工程,2018,8(1):93-97.
[5]高超,曹养同,刘成林,等.塔里木盆地西南凹陷古新统巨厚海相石膏岩沉积特征及环境意义[J].矿床地质,2016,35(6):1217-1229.