滇西澜沧江锡矿带电气石地球化学数据集

本数据包含电气石的主微量地球化学数据以及硼同位素数据。电气石样品采集自云南澜沧江锡矿带上的几个锡矿床以及周边围岩，包括变质岩和花岗岩。电气石的主量元素采用电子探针在薄片上进行原位分析；电气石微量元素和硼同位素在薄片上采用激光剥蚀电感耦合等离子体质谱技术(LA-ICP-MS)进行原位测试，并在电子探针数据基础上进行分析。获得的数据表明，与成矿相关的电气石指示了成矿流体来源于高分异的S型花岗质岩浆。流体主要富集B、Sn和Al。低Fe/(Mg + Fe)比、高氧逸度和Al饱和度有利于锡石的沉淀，是大型锡矿床成矿潜力的标志。

This dataset contains major and trace element geochemical data and boron isotope data of tourmaline. Tourmaline samples were collected from several tin deposits on the Lancang River tin ore belt in Yunnan Province and their surrounding wall rocks, including metamorphic rocks and granite. Major elements of tourmaline were analyzed in situ on thin sections via electron probe microanalysis (EPMA); trace elements and boron isotopes of tourmaline were tested in situ on thin sections using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS), with the analysis conducted based on the EPMA dataset. The acquired data indicate that ore-forming-associated tourmaline reveals that the ore-forming fluids originated from highly differentiated S-type granitic magma. The fluids are primarily enriched in B, Sn and Al. Low Fe/(Mg + Fe) ratio, high oxygen fugacity and Al saturation are conducive to the precipitation of cassiterite, which serves as an indicator of the metallogenic potential of large-scale tin deposits.

搜集汇总

背景与挑战

背景概述

该数据集包含滇西澜沧江锡矿带电气石的主微量地球化学数据及硼同位素数据，揭示了成矿流体来源于高分异的S型花岗质岩浆，并指出低Fe/(Mg+Fe)比、高氧逸度和Al饱和度是大型锡矿床成矿潜力的标志。数据以Excel格式存储，分为电子探针主量数据、LA-ICP-MS微量数据和硼同位素数据三个文件。