湘南尖峰岭岩体伟晶岩壳矿物特征与成因机制:来自云母和石英成分的约束

BinWu ZHANG; Chunli Guo; Yang Qizhi; Yi Lu; Qianqian Zhao; Jiao MIU; Yiming Xu

doi:10.18654/1000-0569/2026.06.06

January 1, 2026Acta Petrologica SinicaOpen Access

湘南尖峰岭岩体伟晶岩壳矿物特征与成因机制:来自云母和石英成分的约束

View Full Paper

Ask AI

Bookmark

Share

Key Points

The study aims to reveal the formation mechanisms of pegmatitic shells and their connection to rare metal mineralization in the Xiangnan Mountain granite.
Utilized techniques like cathodoluminescence (CL), electron probe microanalysis (EPMA), and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS)
Conducted systematic analysis of quartz and mica structures as well as major and trace element geochemistry
Characterized quartz into four types and mica into three stages to elucidate mineral transformations
Quartz types Q1 to Q4 show a decreasing trend in Ti content and increasing Ge levels, indicating evolution from magmatic to hydrothermal environments.
Mica transitions from biotite (M1) to lepidolite (M2), and eventually to muscovite (M3), with respective increases in Al and Si and decreases in Sn, W, Nb, and Ta.
The study concludes that the pegmatitic shell reflects a complete evolution from high-temperature magmatic crystallization to low-temperature hydrothermal alteration, confirming its role in concentrating volatile elements.

Implication

Investigates geochemical characteristics related to rare metal mineralization in granitic formations, suggesting a significant volcanological link.

Abstract

伟晶岩壳是指产于高分异花岗岩体顶部,由单向固结结构(UST-Unidirectional Solidification Texture)与细晶岩组成,其成因机制与稀有金属成矿作用的内在联系是目前岩石学领域的重要科学问题。本文以湘南尖峰岭花岗岩体顶部发育的伟晶岩壳为研究对象,采用阴极发光(CL)、电子探针(EPMA)和激光剥蚀电感耦合等离子体质谱(LA-ICP-MS)等测试手段,开展系统的石英和云母结构特征以及主、微量元素地球化学分析,以揭示伟晶岩壳的成因机制及其与稀有金属矿化的关系。研究表明,尖峰岭伟晶岩壳中的石英可划分为四类(从Q1到Q4),微量元素替代机制以Al³⁺+Li⁺Si⁴⁺的电荷耦合置换为主,并伴随H⁺、Na⁺、K⁺、B³⁺、P⁵⁺等元素的协同补偿。从Q1至Q4,Ti含量逐步递减,Ge含量逐步递增,Al/Ti和Ge/Ti比值逐渐升高,指示从岩浆向热液环境的连续演化。云母可划分为三个阶段,从黑鳞云母(M1)

Discussion

No takes yet. Share an insight, caveat, or question.

Cite This Study

ZHANG et al. (2026) studied this question.

synapsesocial.com/papers/6a192d13fab5b468c4415eab https://doi.org/10.18654/1000-0569/2026.06.06

View Full Paper

Ask AI

Bookmark

Share

湘南尖峰岭岩体伟晶岩壳矿物特征与成因机制:来自云母和石英成分的约束

Key Points

Implication

Abstract

Discussion

Cite This Study

湘南尖峰岭岩体伟晶岩壳矿物特征与成因机制:来自云母和石英成分的约束

Key Points

Implication

Abstract

Discussion

Cite This Study

Keep reading

More related papers

More from Acta Petrologica Sinica

Keep reading

More related papers

More from Acta Petrologica Sinica