Geochemical constraints on weathering and provenance of stream sediments from Bat Xat, northwestern Vietnam

The stream sediment samples collected from the Bat Xat district in Vietnam have been studied to establish their geochemical characteristics, provenance, weathering intensity, and climate. This comprehensive investigation included major, trace, and rare earth elements (REEs). The sediments were class...

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Bibliographic Details
Published in:Applied geochemistry 2024-12, Vol.177, p.106235, Article 106235
Main Authors: Tran, Anh Tuan, Nguyen, Dung Chi, Pham, Dung Thi, Hoang, Tha Van, Pham, Dang Thanh, Nguyen, Qua Xuan, Vu, Ha Van, Dang, Tuan Minh, Tran, Tuan Dang, Nguyen, Tai Trong, Doan, Tra Thu Thi, Cu, Thang Sy, Dang, Quan Tran, Tran, Cong Quoc, Pham, Lien Phuong Thi
Format: Article
Language:English
Subjects:
Archean eon
Bat Xat
climate
domain
Geochemistry
monsoon season
Provenance
sediments
Stream sediment
streams
trace elements
Vietnam
Weathering
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Summary:The stream sediment samples collected from the Bat Xat district in Vietnam have been studied to establish their geochemical characteristics, provenance, weathering intensity, and climate. This comprehensive investigation included major, trace, and rare earth elements (REEs). The sediments were classified as greywacke, lithicarenite, and arkose, denoting compositionally immature deposits. The sediments exhibited moderate chemical weathering in the source domain, with a CIA average value of 67.01, PIA of 73.58, and ICV of 1.05. This suggests a depositional environment influenced by humid climatic conditions attributed to the attenuation of the Indian summer monsoon. The trace element and REE geochemistry of the Bat Xat sediments symbolize their characteristic signatures, with REE patterns mirroring those of their origins. The initial source materials are primarily associated with felsic rocks, with a smaller contribution from sedimentary and metamorphosed sedimentary rocks in the study area. Geochemical characteristics are large fluctuations in Eu/Eu∗ values and high (Gd/Yb)N ratios. We assume that Bat Xat sediments originated from the exhumated Archean crystalline basement or mixed rocks of the Archean component. •The first study examines weathering intensity and provenance in Bat Xat, Vietnam.•Chemical weathering dominates rock alteration, effect by humid climatic conditions.•Stream sediments can be a reliable source for studying the weather and paleoclimate.•The Bat Xat deposits probably originate from Archean basement rock components.
ISSN:0883-2927
DOI:10.1016/j.apgeochem.2024.106235