巴布亚新几内亚从国家规模地球化学角度评估铟找矿潜力

IF 3.4 2区地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS Journal of Geochemical Exploration Pub Date : 2023-04-01 DOI:10.1016/j.gexplo.2023.107156

Wang Tiangang , Conrad Kumul , Zhao Yuhao , Nathan Mosusu , Yao Zhongyou , Zhang Bimin , Wang Xueqiu , Zhu Yiping

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引用次数: 1

摘要

基于巴布亚新几内亚国家尺度地球化学基线(PNG- ngb)项目(2015-2018)成果，研究了巴布亚新几内亚水系沉积物中铟的空间分布和统计特征。共收集样本1399个，覆盖面积约12.8万km2，样本密度约为1.1个站点/100 km2。巴布亚新几内亚水系沉积物中铟的浓度范围为0.003 ~ 0.24 μg/g，基线(中值)为0.067 μg/g，略高于欧洲、北美、澳大利亚和中国的上地壳铟丰度。利用累积频率法和对比值确定了64个铟异常，其中39个异常与斑岩、VMS、夕卡岩、铝土矿、而斑岩和VMS矿化是找矿的重要类型。母岩类型也是控制巴布亚新几内亚水系沉积物中铟地球化学分布模式的重要因素。

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Assessment of indium prospecting potential in national-scale geochemical perspective, Papua New Guinea

The spatial distribution and statistics of indium in stream sediments from Papua New Guinea (PNG) were studied based on the results of Papua New Guinea National-Scale Geochemical Baseline (PNG-NGB) project (2015–2018). 1399 samples were collected covering approximately 128,000 km² with sample density of approximately 1.1 site/100 km². Indium concentration in the stream sediments of PNG ranged from 0.003 μg/g to 0.24 μg/g with a baseline (median) value of 0.067 μg/g, a value of slightly higher than the upper crustal abundance of indium and Europe, North America, Australia and China. 64 indium anomalies are decided by cumulative – frequency method and contrast value, 39 anomalies are associated with porphyry, VMS, skarn, bauxite, and epithermal deposits and occurrences while porphyry and VMS mineralization is the most important type for indium prospecting and exploration. Parent rock type is also an important factor that controls the geochemical pattern of the indium distribution in stream sediments of PNG.

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来源期刊

Journal of Geochemical Exploration 地学-地球化学与地球物理

CiteScore

7.40

自引率

7.70%

发文量

148

审稿时长

8.1 months

期刊介绍： Journal of Geochemical Exploration is mostly dedicated to publication of original studies in exploration and environmental geochemistry and related topics. Contributions considered of prevalent interest for the journal include researches based on the application of innovative methods to: define the genesis and the evolution of mineral deposits including transfer of elements in large-scale mineralized areas. analyze complex systems at the boundaries between bio-geochemistry, metal transport and mineral accumulation. evaluate effects of historical mining activities on the surface environment. trace pollutant sources and define their fate and transport models in the near-surface and surface environments involving solid, fluid and aerial matrices. assess and quantify natural and technogenic radioactivity in the environment. determine geochemical anomalies and set baseline reference values using compositional data analysis, multivariate statistics and geo-spatial analysis. assess the impacts of anthropogenic contamination on ecosystems and human health at local and regional scale to prioritize and classify risks through deterministic and stochastic approaches. Papers dedicated to the presentation of newly developed methods in analytical geochemistry to be applied in the field or in laboratory are also within the topics of interest for the journal.