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Geochemical exploration for platinum group element deposits in Miyi county, Sichuan province, southwestern China

Cheng Hangxin, Zhao Chuandong, Liu Yinghan, Zhang Qin, Yang Ke, Liu Fei, Li Kuo, Peng Min and Li Min
Geochemical exploration for platinum group element deposits in Miyi county, Sichuan province, southwestern China
Geochemistry - Exploration, Environment, Analysis (October 2014) 15 (1): 39-53

Abstract

A large Pt-Pd geochemical province within the Emeishan basalt province has been identified previously and was considered as an exploration target for platinum-group element (PGE) mineralization. To evaluate thoroughly the prospect of economic Pt-Pd mineralization in this region, a series of geochemical surveys was conducted in a selected area, with an exploration strategy involving the progressive reduction of the target area and stepwise increase in the sampling density. A regional Pt and Pd geochemical anomaly was delineated by a stream sediment survey at a sampling density of 1 sample km (super -2) over an area of mafic intrusive bodies and basalts in Miyi County, Sichuan Province. In a follow-up phase, three local Pt and Pd geochemical anomalies were defined by data from a stream sediment survey with a density of 4 samples km (super -2) . Finally, PGE mineralization within a gabbroic rock was discovered in the geochemical anomalies delineated by the following more detailed survey, namely a soil survey with a 100 m X 20 m sampling grid. The level of Pt+Pd mineralization was 0.33 mu g g (super -1) . A new concealed mafic-ultramafic intrusive body containing PGE mineralization was predicted.The success of this case has provided an excellent example of how to identify possible PGE target areas in the basalt environment using geochemical surveys at various scales.


ISSN: 1467-7873
EISSN: 2041-4943
Serial Title: Geochemistry - Exploration, Environment, Analysis
Serial Volume: 15
Serial Issue: 1
Title: Geochemical exploration for platinum group element deposits in Miyi county, Sichuan province, southwestern China
Affiliation: Chinese Academy of Geological Sciences, Institute of Geophysical and Geochemical Exploration, Langfang, China
Pages: 39-53
Published: 20141029
Text Language: English
Publisher: Geological Society Publishing House, London, United Kingdom
Number of pages: unpaginated
References: 55
Accession Number: 2014-099643
Categories: General geochemistryEconomic geology, geology of ore deposits
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables, geol. sketch maps
N26°40'00" - N27°19'60", E102°00'00" - E102°30'00"
Secondary Affiliation: China Geological Survey, CHN, China
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 201450
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