越南西北部 Bat Xat 溪流沉积物风化和成因的地球化学制约因素

IF 3.1 3区 地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS
Anh Tuan Tran , Dung Chi Nguyen , Dung Thi Pham , Tha Van Hoang , Dang Thanh Pham , Qua Xuan Nguyen , Ha Van Vu , Tuan Minh Dang , Tuan Dang Tran , Tai Trong Nguyen , Tra Thu Thi Doan , Thang Sy Cu , Quan Tran Dang , Cong Quoc Tran , Lien Phuong Thi Pham
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引用次数: 0

摘要

对从越南 Bat Xat 地区采集的溪流沉积物样本进行了研究,以确定其地球化学特征、出处、风化强度和气候。这项综合调查包括主要元素、痕量元素和稀土元素(REEs)。沉积物被划分为灰岩、碎屑岩和霰砂岩,表示成分不成熟的沉积物。沉积物在源域表现出中等程度的化学风化,CIA 平均值为 67.01,PIA 为 73.58,ICV 为 1.05。这表明沉积环境受到印度夏季季风衰减造成的潮湿气候条件的影响。Bat Xat 沉积物的痕量元素和稀土元素地球化学特征象征着它们的特征,稀土元素模式反映了它们的起源。最初的来源物质主要与长英岩有关,研究区域内的沉积岩和变质沉积岩对其影响较小。地球化学特征是 Eu/Eu∗ 值波动较大,(Gd/Yb)N 比值较高。我们推测,Bat Xat沉积物起源于被剥蚀的阿尔川结晶基底或阿尔川成分的混合岩石。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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 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.
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来源期刊
Applied Geochemistry
Applied Geochemistry 地学-地球化学与地球物理
CiteScore
6.10
自引率
8.80%
发文量
272
审稿时长
65 days
期刊介绍: Applied Geochemistry is an international journal devoted to publication of original research papers, rapid research communications and selected review papers in geochemistry and urban geochemistry which have some practical application to an aspect of human endeavour, such as the preservation of the environment, health, waste disposal and the search for resources. Papers on applications of inorganic, organic and isotope geochemistry and geochemical processes are therefore welcome provided they meet the main criterion. Spatial and temporal monitoring case studies are only of interest to our international readership if they present new ideas of broad application. Topics covered include: (1) Environmental geochemistry (including natural and anthropogenic aspects, and protection and remediation strategies); (2) Hydrogeochemistry (surface and groundwater); (3) Medical (urban) geochemistry; (4) The search for energy resources (in particular unconventional oil and gas or emerging metal resources); (5) Energy exploitation (in particular geothermal energy and CCS); (6) Upgrading of energy and mineral resources where there is a direct geochemical application; and (7) Waste disposal, including nuclear waste disposal.
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