西羌塘地体勒玛擦矿化区角闪石电子探针数据集

本数据集包括勒玛擦岩浆岩中角闪石电子探针数据，探讨研究岩浆起源及演化过程，研究表明，勒玛擦矿化区中角闪石堆晶岩和闪长玢岩中的角闪石主要为幔源，而石英闪长玢岩、花岗闪长岩及其中包体中的角闪石主体显示壳幔混源的特征。角闪石的电子探针成分分析在南京宏创地质勘查技术服务有限公司利用日本电子JXA-iSP100型号的电子探针完成。测试过程中采用的加速电压为15 kV，电流为20 nA，束斑直径为5 μm。Fe、S峰位的测试时间为10s，Co、Ni、Cu峰位的测试时间为20s，As、Au、Ag峰位的测试时间为40s，上下背景的测试时间为峰位的一半。采用ZAF法对数据进行基体校正。所用标样如下：钠长石（Na，Al）、透辉石（Si，Ca，Mg）、透长石（K）、金红石（Ti）、赤铁矿（Fe）、蔷薇辉石（Mn）、铬氧化物（Gr）、萤石（F）和硅铍铝钠石（Cl）。相关的研究成果以第一资助发表在国内著名期刊岩石学报上。

This dataset comprises electron probe microanalysis (EPMA) data of amphiboles from the Lemacha igneous rocks, aimed at investigating the origin and evolution of magmas. Studies indicate that amphiboles from amphibole cumulates and diorite porphyries in the Lemacha mineralization zone are predominantly mantle-derived, while amphiboles in quartz diorite porphyries, granodiorites and their inclusions primarily exhibit crust-mantle mixed source characteristics. Electron probe microanalysis of amphibole compositions was conducted at Nanjing Hongchuang Geological Exploration Technology Service Co., Ltd. using a JEOL JXA-iSP100 electron probe microanalyzer. The testing parameters included an accelerating voltage of 15 kV, a beam current of 20 nA, and a beam spot diameter of 5 μm. The counting time for peak positions of Fe and S was 10 s, that for Co, Ni and Cu was 20 s, and that for As, Au and Ag was 40 s; the counting time for upper and lower backgrounds was half of that for the corresponding peak positions. Matrix correction of the dataset was performed using the ZAF method. The standard reference materials employed are as follows: albite (for Na, Al), diopside (for Si, Ca, Mg), sanidine (for K), rutile (for Ti), hematite (for Fe), rhodonite (for Mn), chromium oxide (for Cr), fluorite (for F), and sodalite (for Cl). Relevant research results have been published in Acta Petrologica Sinica, a prestigious domestic geological journal, with this study as the primary funded project.

搜集汇总

背景与挑战

背景概述

本数据集为西羌塘地体勒玛擦矿化区的角闪石电子探针数据，聚焦于岩浆岩中角闪石的成分分析，用于探讨岩浆起源及演化过程。数据采集使用日本电子JXA-iSP100型号电子探针，覆盖2023年6月至9月的时间范围，并以开放获取方式共享，大小为64.50 KB。研究显示，角闪石来源包括幔源和壳幔混源，相关成果已发表在《岩石学报》期刊上。