| 孟轲荆,李伦,梁兵,林勋奇,胡蕾,李书书,辛江,杨永强.嵩山地区铁里沟花岗岩成因分析及构造意义[J].矿产勘查,2025,16(4):715-724 |
| 嵩山地区铁里沟花岗岩成因分析及构造意义 |
| The petrogenesis and tectonic implication of the Tieligou granites in Songshan area |
| 投稿时间：2024-06-02 |
| DOI：10.20008/j.kckc.202504004 |
| 中文关键词: 花岗岩 岩石学特征 岩石成因 铁里沟 嵩山地区 |
| 英文关键词: granites petrological characteristics petroge-nesis Tieligou Songshan area |
| 基金项目:本文受中国地质调查局地质调查项目“华北克拉通新太古代—古元古代构造转折期的岩浆事件-地层格架(DD20160121-04)”资助。 |
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| 摘要点击次数: 1951 |
| 全文下载次数: 1279 |
| 中文摘要: |
| 嵩山是新太古代 TTG岩石出露的典型地区，新太古代铁里沟花岗岩分布于嵩山地区铁里沟一带，岩石呈灰白色，具中粒花岗结构，片麻状构造，局部发育条带状构造。富 Na2O(1.46%~5.03%)和 SiO2(平均 |
| 英文摘要: |
| Songshan is the typical Neo-Archean granitic rocks outcrop area in China. The Tieligou gneissic trondhjemite is mainly distributed in Tieligou, with medium-grained granitic texture, gneissic and banded struc-tures. The Tieligou gneissic trondhjemite has high concentrations of Na2O (1.46%-5.03%) and SiO2 (average 75.47%), and poor in Fe and Mg, with high ratio of Na2O/K2O and the content of Al2O3 of 12.32%-14.95%, showingthe feature of TTG gneiss with peraluminous. It has the similar geochemical characteristics with the high Si Ceno-zoic adakite, for example, the LREE and HREE are strongly differentiation, with weak negative Eu anomalies, high‐content of Sr, high ratio of Sr/Y, and low contents of Cr, Yb and Y; It is also similar with island arc volcanics on therelational features among Nb, Y, Rb, Th, La and Yb in the rocks. It has been determined that the Tieligao granitebody in the Songshan area is an ancient intrusive rock with TTG characteristics, which was formed by partial melt-ing of aqueous basaltic oceanic crust under the high pressure environment during subduction process. This providesa basis for elucidating the formation, properties, and evolution of the crystalline basement in the southern margin ofthe North China Craton. |
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