Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.sedgeo.2016.02.018 |
Chabazite and dolomite formation in a dolocrete profile: An example of a complex alkaline paragenesis in Lanzarote, Canary Islands | |
Alonso-Zarza, Ana M.1,2; Bustamante, Leticia1; Huerta, Pedro3; Rodriguez-Berriguete, Alvaro1,2; Jose Huertas, Maria1 | |
通讯作者 | Alonso-Zarza, Ana M. |
来源期刊 | SEDIMENTARY GEOLOGY
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ISSN | 0037-0738 |
EISSN | 1879-0968 |
出版年 | 2016 |
卷号 | 337页码:1-11 |
英文摘要 | This paper studies the weathering and soil formation processes operating on detrital sediments containing alkaline volcanic rock fragments of the Mirador del Rio dolocrete profile. The profile consists of a lower horizon of removilised weathered basalts, an intermediate red sandy mudstones horizon with irregular carbonate layers and a topmost horizon of amalgamated carbonate layers with root traces. Formation occurred in arid to semiarid climates, giving place to a complex mineralogical association, including Mg-carbonates and chabazite, rarely described in cal/dolocretes profiles. Initial vadose weathering processes occurred in the basalts and in directly overlying detrital sediments, producing (Stage 1) red-smectites and dolomicrite. Dominant phreatic (Stage 2) conditions allowed precipitation of coarse-zoned dolomite and chabazite filling porosities. In Stages 3 and 4, mostly pedogenic, biogenic processes played an important role in dolomite and calcite accumulation in the profile. Overall evolution of the profile and its mineralogical association involved initial processes dominated by alteration of host rock, to provide silica and Mg-rich alkaline waters, suitable for chabazite and dolomite formation, without a previous carbonate phase. Dolomite formed both abiogenically and biogenically, but without a previous carbonate precursor and in the absence of evaporites. Dominance of calcite towards the profile top is the result of Mg/Ca decrease in the interstitial meteoric waters due to decreased supply of Mg from weathering, and increased supply of Ca in aeolian dust. Meteoric origin of the water is confirmed by C and O isotope values, which also indicate lack of deep sourced CO2. The dolocrete studied and its complex mineral association reveal the complex interactions that occur at surface during weathering and pedogenesis of basalt-sourced rocks. (C) 2016 Elsevier B.V. All rights reserved. |
英文关键词 | Dolocrete Zeolites Groundwater Pedogenic Basalts Canary Islands |
类型 | Article |
语种 | 英语 |
国家 | Spain |
收录类别 | SCI-E |
WOS记录号 | WOS:000375736700002 |
WOS关键词 | NEEDLE-FIBER CALCITE ; CALCRETE FORMATION ; QUATERNARY SOILS ; ORIGIN ; EVOLUTION ; MIOCENE ; DUST ; FUERTEVENTURA ; ENVIRONMENT ; CARBONATE |
WOS类目 | Geology |
WOS研究方向 | Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/196376 |
作者单位 | 1.Univ Complutense Madrid, Fac CC Geol, Dept Petrol & Geoquim, C Jose Antonio Novais 2, E-28040 Madrid, Spain; 2.UCM, Inst Geociencias, IGEO, CSIC, C Jose Antonio Novais 2, Madrid 28040, Spain; 3.Univ Salamanca, Escuela Politecn Super Avila, Dept Geol, Avd Hornos Caleros 50, Avila 05003, Spain |
推荐引用方式 GB/T 7714 | Alonso-Zarza, Ana M.,Bustamante, Leticia,Huerta, Pedro,et al. Chabazite and dolomite formation in a dolocrete profile: An example of a complex alkaline paragenesis in Lanzarote, Canary Islands[J],2016,337:1-11. |
APA | Alonso-Zarza, Ana M.,Bustamante, Leticia,Huerta, Pedro,Rodriguez-Berriguete, Alvaro,&Jose Huertas, Maria.(2016).Chabazite and dolomite formation in a dolocrete profile: An example of a complex alkaline paragenesis in Lanzarote, Canary Islands.SEDIMENTARY GEOLOGY,337,1-11. |
MLA | Alonso-Zarza, Ana M.,et al."Chabazite and dolomite formation in a dolocrete profile: An example of a complex alkaline paragenesis in Lanzarote, Canary Islands".SEDIMENTARY GEOLOGY 337(2016):1-11. |
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