【引用本文】 杨妍萍, 刘晓端, 刘久臣, 等. 川西高原地区岩石中硒的地球化学特征和影响因素[J]. 岩矿测试, 2020, 39(1): 115-126. doi: 10.15898/j.cnki.11-2131/td.201808290098
YANG Yan-ping , LIU Xiao-duan , LIU Jiu-chen , et al. Geochemical Characteristics and Influence Factors of Selenium in Rock in Western Sichuan Plateau[J]. Rock and Mineral Analysis, 2020, 39(1): 115-126. doi: 10.15898/j.cnki.11-2131/td.201808290098

川西高原地区岩石中硒的地球化学特征和影响因素

1. 自然资源部生态地球化学重点实验室, 国家地质实验测试中心, 北京 100037;

2. 河北省煤田地质局第二地质队, 河北 邢台 054001

收稿日期: 2018-08-29  修回日期: 2019-09-17 

基金项目: 中国地质科学院基本科研业务费项目(YYWF201617);中国地质调查局地质调查项目(DD20190655)

作者简介: 杨妍萍,硕士,助理工程师,地质工程专业。E-mail:yangyanping801@126.com。。

Geochemical Characteristics and Influence Factors of Selenium in Rock in Western Sichuan Plateau

1. Key Laboratory of Eco-Geochemistry, Ministry of Natural Resources, National Research Center for Geoanalysis, Beijing 100037, China;

2. The Sceond Geological Brigade of Hebei Coal Geology Bureau, Xingtai 054001, China

Received Date: 2018-08-29
Revised Date: 2019-09-17

摘要:川西高原土壤、水体等多种介质研究表明,该地区的硒含量偏低,天然土壤剖面硒为0.06~0.16μg/g,表层土壤中硒为0.075~0.204μg/g,沉积物中硒为0.069~0.310μg/g,地表水中硒为nd~0.096μg/L,地下水中硒为nd~0.058μg/L,均低于我国相应环境介质中硒的平均含量,影响到当地人体健康。本文采集川西高原地区80件岩石样品,同时采集6套岩心样品,这些样品主要以板岩、砂岩、灰岩和页岩为主。采用原子荧光光谱法测定硒含量,研究川西高原阿坝地区岩石与岩心样品中硒的地球化学特征和低硒的影响因素。结果表明:岩石硒含量范围为0.03~0.43μg/g,平均值0.09μg/g,低于硒土壤背景值。不同类型岩石中的硒含量大小为:页岩 > 灰岩 > 板岩 > 砂岩。岩石中硒含量在不同地区也表现出较大的差异:松潘 > 阿坝 > 壤塘 > 马尔康 > 九寨沟 > 若尔盖 > 红原,可能是受到岩石类型及有机质和地质环境的影响所造成。岩心各剖面的硒含量最小值0.02~0.07μg/g,最大值0.21~0.34μg/g,平均值0.06~0.17μg/g,各钻孔的硒含量明显低于硒的地壳丰度。本研究认为,硒的分布受地质环境、有机质、岩石致密性等条件限制,低硒的地质环境是导致岩石中的硒含量较低的最主要因素。

关键词: 岩石, 岩心, , 有机质, 原子荧光光谱法, 地质环境

Geochemical Characteristics and Influence Factors of Selenium in Rock in Western Sichuan Plateau

KEY WORDS: rocks, core, selenium, organic matter, atomic fluorescence spectrometry, geological environment

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川西高原地区岩石中硒的地球化学特征和影响因素

杨妍萍, 刘晓端, 刘久臣, 汤奇峰, 孟拓, 朱晓华