Geochemical data from granite and basalt weathering profiles in Kuantan, Malaysia.

This dataset tests the hypothesis that parent lithology exerts first-order control on tropical weathering pathways and REE fractionation under identical climatic conditions. It contains geochemical data from adjacent Permian granite and Pleistocene basalt profiles.

Key Findings:

Granite profiles show heterogeneous weathering, significant REE enrichment, and extreme positive Ce anomalies (>135) indicating redox-controlled fractionation.

Basalt profiles exhibit uniform lateritization with near-total silica loss, REE depletion, and subdued Ce anomalies, reflecting a leaching-dominated regime.

Methods:

23 samples from 7 profiles collected at 1.5m vertical intervals

Major elements by XRF on lithium borate fusion beads

Trace elements/REEs by ICP-MS (Agilent 7900)

Weathering indices (CIA, MIA, IOL) and REE anomalies calculated

Data Interpretation:

Use molar proportions for weathering indices: CIA = [Al₂O₃/(Al₂O₃+CaO+Na₂O+K₂O)]×100

REE anomalies: Ce/Ce* = Ceₙ/√(Laₙ×Prₙ); Eu/Eu* = Euₙ/√(Smₙ×Gdₙ)

Compare vertical trends: granite shows variable fractionation; basalt shows systematic depletion

Reuse Potential:

Comparative studies of lithological control on weathering

Modeling of REE fractionation during pedogenesis

Benchmark for tropical soil geochemistry studies

Related Publication: [Title: Lithological control on pedogenesis and REE fractionation in tropical weathering profiles: A comparative study of granite and basalt in Kuantan, Peninsular Malaysia. Authors: Azmiah Jamil, Azman A Ghani, Ahmad Sheeqal Shah Abdul Samad, Nur Chitra Dewi Mohamad Noor, Muzammil Shahjamal, Amira Fahira Masor, Journal: CATENA (under review)]

License: CC-BY 4.0

Formats: .xlsx (tabular data)

本数据集旨在验证下述假说：在相同气候条件下，母岩岩性对热带风化路径及稀土元素（REE，Rare Earth Elements）分馏具有一级控制作用。数据集包含相邻的二叠纪花岗岩剖面与更新世玄武岩剖面的地球化学数据。

主要研究结果：
花岗岩剖面表现出非均质性风化特征，存在显著的稀土元素富集现象，且出现极端正铈（Ce）异常（>135），表明分馏过程受氧化还原作用调控。
玄武岩剖面则呈现均匀的红土化作用，伴随近乎完全的硅流失、稀土元素贫化以及较弱的铈异常，反映其以淋溶作用为主导的风化机制。

实验方法：
从7条剖面中共采集23个样品，采样间距为垂直方向1.5米；
主量元素采用X射线荧光光谱（X-ray Fluorescence, XRF）对硼酸锂熔融制样的熔珠进行分析；
微量元素与稀土元素采用电感耦合等离子体质谱（Inductively Coupled Plasma Mass Spectrometry, ICP-MS，Agilent 7900型号）测定；
计算风化指数（包括CIA、MIA、IOL）以及稀土元素异常值。

数据解读说明：
风化指数采用摩尔比例计算：化学蚀变指数（CIA） = [Al₂O₃/(Al₂O₃+CaO+Na₂O+K₂O)]×100
稀土元素异常值计算公式：铈异常值Ce/Ce* = Ceₙ/√(Laₙ×Prₙ)；铕异常值Eu/Eu* = Euₙ/√(Smₙ×Gdₙ)
垂向变化趋势对比：花岗岩剖面表现出不均一的分馏特征，而玄武岩剖面则呈现系统性的元素贫化。

复用潜力：
开展岩性对风化作用控制的对比研究；
成土过程中稀土元素分馏的模拟研究；
作为热带土壤地球化学研究的基准数据集。

相关出版物：[标题：马来西亚半岛关丹地区花岗岩与玄武岩热带风化剖面的岩性对成土作用及稀土元素分馏的控制：对比研究；作者：Azmiah Jamil、Azman A Ghani、Ahmad Sheeqal Shah Abdul Samad、Nur Chitra Dewi Mohamad Noor、Muzammil Shahjamal、Amira Fahira Masor；期刊：CATENA（审稿中）]

授权协议：知识共享署名4.0（CC-BY 4.0）

数据格式：.xlsx（表格型数据）