| 胡冰,聂阳,王永魁,郑文龙.道口地区傲徕山序列岩石地球化学特征及成因机制[J].矿产勘查,2026,17(S1):1-9 |
| 道口地区傲徕山序列岩石地球化学特征及成因机制 |
| Rock geochemical characteristics and genesis mechanism of Aolai Mountain sequence in Daokou area |
| 投稿时间：2025-12-24 修订日期：2026-01-16 |
| DOI：10.20008/j.kckc.2026S1001 |
| 中文关键词: 傲徕山序列 道口 地球化学特征 成因机制 |
| 英文关键词: Aolai Mountain sequence level crossing geochemical characteristics genetic mechanism |
| 基金项目:本文受山东省地质勘查基金项目“山东省1∶5万道口幅区域地质调查”（鲁勘字（2013）125号）资助和山东省地质勘查基金项目“山东省1∶5万苏村幅、夏庄幅矿产地质调查”（鲁勘字（2019）20号）联合资助。 |
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| 中文摘要: |
| 道口地区傲徕山序列多呈岩基状产出，可划分为蒋峪、条花峪两个岩体，本文通过对其进行系统取样分析，研究各岩体岩石学、岩石地球化学等特征，揭示其具有从早到晚结构由粗到细、暗色矿物逐渐减少的演化特征，其宏观展布特征指示其就位机制为强力膨胀式与底辟刺穿式。其岩石学上均属高钾钙碱性过铝质酸性侵入岩；地球化学方面，在A-C-F图解显示其多为S型花岗岩；R1-R2图解指示其为碰撞后隆起花岗岩，微量元素中蒋峪单元 Ni、Rb、Th 等元素含量偏高，条花峪单元除 Pb、Cr 外多数元素低于维氏酸性岩均值，稀土元素均表现为铕亏损、轻稀土富集的特征。据锆石 U-Pb 测年结果显示（蒋峪单元锆石U-Pb年龄（2527±14）Ma，条花峪单元（2516±11）Ma），形成于新太古代末期五台期，是同碰撞构造背景下上地壳物质重熔形成的壳源重熔型花岗岩。 |
| 英文摘要: |
| The Aolai Mountain sequence in the Daokou area predominantly occurs as a plutonic body， which can be divided into two intrusive units： Jiangyu and Tiaohuayu. Through systematic sampling and analysis， the petrology and petrogeochemistry of these units were studied， revealing an evolutionary trend from coarse to fine texture and a gradual decrease in dark minerals from early to late stages. Their macroscopic distribution characteristics indicate mechanisms of emplacement involving intense expansion and diapiric punching. Petrologically， they are all high-K calc-alkaline peraluminous acidic intrusive rocks. Geochemically， the A-C-F diagram primarily shows S-type granites， while the R1-R2 diagram indicates post-collisional uplift granites. In trace elements， the Jiangyu unit exhibits elevated Ni， Rb， Th， and other elements， whereas the Tiaohuayu unit generally has lower values for most elements compared to the average of Wadia acidic rocks， with consistent characteristics of europium depletion and enrichment of light rare earth elements. Zircon U-Pb dating results （Jiangyu unit： 2527±14 Ma； Tiaohuayu unit： 2516±11 Ma） indicate formation during the late Neoarchean Wutaiian epoch， representing crustal-derived remelting granites formed by the reworking of upper crustal materials under a coeval collisional tectonic setting. |
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