华北陆块北缘西段中元古代与裂谷作用有关的铁、稀土、多金属矿床特征及成因  

The Characteristics and Origin of Iron REE Poly-Metal Deposits Related to Rift System of Middle Proterozoic in the Western Part of Northern Margin of North China Block

作　　者：曹秀兰[1] 

机构地区：[1]天津地质矿产研究所,天津300170

出　　处：《前寒武纪研究进展》2002年第3期246-255,共10页Progress in Precambrian Research

基　　金：中国地质调查局"华北地台成矿规律和找矿方向综合研究项目"(编号 :2 0 0 110 2 0 0 0 38)

摘　　要：华北陆块北缘西段狼山—白云鄂博裂谷系中元古代形成的大型多金属矿床 ,是我国重要的铁、稀土、铜、铅、锌矿产地。矿床为产于沉积岩中热水沉积型多金属矿床。其形成受地层、构造控制 ,与裂谷作用有着密切的关系。裂谷系内外分支的地质环境及矿床矿种不同 ,导致矿床特征及成因具有一定差异。白云鄂博铁、稀土矿床为钾、钠、磷等含量较高的热水沉积型 ,霍各乞铜、铅、锌多金属矿床为与中基性火山岩有关的过渡热水沉积型 ,东升庙和甲生盘等铅、锌多金属矿床为热水沉积型。文中将对上述矿床分别进行论述。The large-scaled poly-metal deposits formed in Mesozoic in Langshan-Baiyunebo rift system occurred in western part of northern margin of North China Block are expected to be the significant suppliers of Iron, REE, Copper, Lead and Zinc ore resources in China.The formation of these poly-metal deposits, which are controlled by strata and structures obviously, are directly related to the rifting. They are hydrothermal solution sedimentation poly-metal deposits trapped in sedimentary rock series. The characteristics and origin of deposits occurred from inner branch to outer branch of Langshan-Baiyunebo rift system show a certain degree of difference because of the variation of geological environment and ore compositions. Baiyun'ebo Iron REE deposit is hydrothermal solution sedimentation deposit with high quantities of Potassium, Sodium and Phosphorus. Huogeqi Copper Lead Zinc deposit is belong to transitional hydrothermal solution sedimentation deposit influenced by medium-basic volcanism and Dongshengmiao and Jiashengpan Lead Zinc deposits are hydrothermal sedimentation poly-metal deposits. All these typical deposits have been studied and discussed respectively in this paper.

关 键 词：裂谷作用 成因 中元古代 铁 铜 铅 锌 金属矿床 矿床成因 华北地块 稀土矿床 成矿作用 

分 类 号：P618.2[天文地球—矿床学]