| 郭爱锁,陈雪,王红军,李重阳,裴海洋,施亮亮.小秦岭樊岔金矿床地球化学特征及指示意义[J].矿产勘查,2025,16(7):1621-1633 |
| 小秦岭樊岔金矿床地球化学特征及指示意义 |
| Geochemical characteristics and indicative significance of Fancha gold deposit in Xiaoqinling |
| 投稿时间：2025-04-18 |
| DOI：10.20008/j.kckc.202507006 |
| 中文关键词: 主量元素 微量元素 地球化学特征 小秦岭成矿带 樊岔金矿 |
| 英文关键词: major element trace element geochemical characteristics Xiaoqinling metallogenic belt Fancha gold deposit |
| 基金项目:本文受河南省科技攻关项目(202102310290)和灵宝金源矿业股份有限公司科研项目“河南省灵宝市金源二矿南部矿区三维地质建模及深部找矿预测”(2025-03)联合资助。 |
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| 中文摘要: |
| 樊岔金矿床位于小秦岭成矿带东部，是区内典型的石英脉型金矿床，区内构造岩浆活动频繁，成矿背景好。为探讨矿床元素的分布特征及成矿物质来源，本文通过对太华群片麻岩、燕山期花岗岩及金矿石开展主量元素、微量元素地球化学特征研究，结果表明:矿石主量元素具有较高的 SiO2、TFe2O3含量，与矿区内普遍发育的硅化、金属硫化物矿化的地质特征一致；矿体蚀变围岩具有较高的 CaO、Na2O、K2O含量，与矿体周围发育的钾长石化、碳酸盐化有关；金矿石、太华群片麻岩、辉绿岩、燕山期花岗岩等均表现为轻稀土富集、重稀土亏损的右倾稀土元素配分模式，其中金矿石与燕山期花岗岩的稀土元素配分模式曲线一致，指示两者具有一定的成因联系。结合成矿地质背景，认为樊岔金矿形成于燕山期构造体制转换背景下的构造-岩浆热液成岩、成矿体系。 |
| 英文摘要: |
| The Fancha gold deposit is located in the eastern part of the Xiaoqinling metallogenic belt. It is atypical quartz vein-type gold deposit in the area. The tectonic magmatic activities in the area are frequent and themetallogenic background is good. To explore the distribution characteristics of elements in ore deposits and thesources of ore-forming materials, this paper conducts research on the geochemical characteristics of major and trace elements in gneiss of the Taihua Group, granites of the Yanshanian period and gold ores. The results show that: Themain elements of the ore have relatively high contents of SiO2 and TFe2O3, which are consistent with the geologicalcharacteristics of silicification and metal sulfide mineralization that are commonly developed in the mining area.The altered surrounding rock of the ore body has a relatively high content of CaO, Na2O and K2O, which is related tothe potassium feldtization and carbonation developed around the ore body. Gold ores, Taihua Group gneiss, diabase,and Yanshanian granites all exhibit a right-skewed rare earth element distribution pattern characterized by enrich-ment of light rare earths and depletion of heavy rare earths. Among them, the rare earth element distribution patterncurves of gold ores and Yanshanian granites are consistent, indicating a certain genetic connection between the two.Combined with the geological background of mineralization, it is believed that the Fancha gold deposit was formedin the tectonic-magmatic hydrothermal diagenetic and metallogenic system under the background of the structuralsystem transformation during the Yanshanian period. |
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