摘要
本文以豫西金矿为例,以碰撞造山带的构造模式为基础,探讨了碰撞造山过程中成岩、成矿作用的特征和时空演化规律,建立了碰撞造山成岩成矿模式。指出碰撞造山带的超叠壳楔上,随距缝合线距离的增大,依次出现热液矿床(D)带、花岗岩(G)带和斑岩(P)带。豫西小秦岭、熊耳山、外方山、桐柏和二郎坪等地金矿集中区的岩石、矿床和地球化学分带性与理论推导的模式吻合,表明豫西金矿形成于中生代的碰撞造山作用。有效的找矿工作应以碰撞造山成岩成矿模式为指导。
In the western area of Henan Province, gold deposits are concentrated in the Mesozoic collision erogenic belt. Therefore, based on the tectonic model of the collision orogenic belt, the characteristics and the spatial-temporal evolution of diagenesis and metallogenesis in collision orogeny are discussed, and the diagenetic and metallogenic model for collision orogeny is proposed. According to the model, hydrothermal deposit(D) zone, granite(G) zone and porphyry(P) zone are distributed in turn as distance from the collision suture increases in the overlapping crustal unit. Petrological, metallogenic and geochemical zonation in all the auriferous provinces, including Xiaoqinling, Xiongershan, Waifangshan and Tongbai and Erlongping areas are completely coincident with the diagenetic and metallogenic model. Ski the Mesozoic collision orogenesis is responsible for the formation of gold deposits in Western Henan. Effective prospecting for gold deposits should be carried out according to the model.
出处
《地质科技情报》
CAS
CSCD
北大核心
1991年第4期63-68,共6页
Geological Science and Technology Information
基金
国家自然科学基金
开放室基金资助
