陕西黄龙铺—河南栾川地区钼矿床地质特征及控矿因素

ORE-CONTROLLING FACTORS AND GEOLOGY OF THE MOLYBDENUM ZONE IN BETWEEN THE HUANGLONGPU AREA IN SHAANXI PROVINCE AND THE LUANCHUAN AREA IN HENAN PROVINCE

本文对陕西省黄龙铺—河南省栾川钼矿带区域成矿背景作了简述。在矿带内分出了金堆城—黄龙铺、夜长坪—银家沟、南泥湖—栾川三个钼矿集中区。将钼矿分为两个成矿系列(碱基性碳酸岩岩浆成矿系列,中酸性岩浆—热液成矿系列),三种成因类型(碳酸岩脉型、斑岩型、矽卡岩型或斑岩—矽卡岩型),四个成矿期次(海西—印支期碳酸岩脉型钼成矿期,燕山早期第一阶段矽卡岩型钼成矿期,燕山早期第二阶段—燕山晚期斑岩型钼成矿期,燕山晚期岩浆期后热液脉型成矿期)。以典型矿床(点)为例,配以大量的图、表,对不同类型的矿床特征作了介绍。总结了6条成矿规律,6条找矿标志,指出了10个找矿有利区。认为华北地台南缘地壳深部存在一个以钼为主的成矿元素"流体库"及岩浆源,成矿物质来源于地壳深部及上地幔。

Based on research of the molybdenum mineralization occurring in between the Huanglongpu area in Shaanxi province and the Luanchuan area in Henan province, three molybdenum mineralized accumulation areas are divided from the molybdenum zone, including the Jinduicheng-Huanglongpu, Yechangping-Yinjiagou and Nannihu-Luanchuan molybdenum accumulation areas. The molybdenum mineralization zone can be separable into two metallogenic series （ magma series of alkali-basic-carbonatite and geothermal metallogenic series of intermediate-acid magma）, three genetic types （conbonatite veins, porphyry type, skarn or porphyry-skarn type） and four metallogenic phases （Hercynian-Indosinian conbonatitie veins, skarn type of the first stage of the Yanshanian period, porphyry type of the second stage of the late Yanshanian period, postmagmatic geothermal veins in the late of the Yanshanian period） . Through analysis of typical molybdenum deposits （occurrences） with a lot of maps and charts, 6 metallogenic factors, 6 prospecting indicators and 10 potential areas of molybdenum mineralization are recommended in this article. A metallogenic source and magma dominant in molybdenum exists deep-seated crust of the south margin of the North China Platform and metallogenic materials are originated from the depth of crust and the upper mantle.