贡嘎山海螺沟冰川退缩区土壤序列矿物组成变化
VARIATION OF MINERAL COMPOSITION ALONG THE SOIL CHRONOSEQUENCE AT THE HAILUOGOU GLACIER FORELAND OF GONGGA MOUNTAIN
查看参考文献28篇
文摘
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阐明土壤中矿物随时间变化的机制是理解矿物风化和土壤发育的基础。利用X射线衍射法对贡嘎山海螺沟冰川退缩区土壤矿物组成随成土作用时间变化进行了定量分析。结果表明,冰川退缩区成土母质的矿物组成同质性较高,以硅酸盐矿物为主(约90%),包括:斜长石(28.5%)、石英(24.5%)、黑云母、钾长石、普通辉石、角闪石、绿泥石、蛭石;并有少量碳酸盐矿物,如方解石(<8%)、白云石(<2.3%);以及磷酸盐矿物磷灰石(<2.1%)。退缩区土壤的矿物组成总体呈新发育土壤特征,随着成土年龄的增加,方解石逐渐被风化成为草酸钙石,角闪石、黑云母、磷灰石和绿泥石含量逐渐降低,长英质矿物的相对含量有所增加。成土作用中矿物组成的变化受植被原生演替和土壤pH的影响,快速发育的植被导致土壤pH迅速降低,风化程度增强。 |
其他语种文摘
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Weathering of bedrocks releasing mineral elements into the pedosphere is the starting point of global element recycling. Therefore, the knowledge of the variation of soil minerals in the soil with the soil forming process and its mechanism is the basis for understanding soil weathering and development. Since the end of the Little Ice Age, the glacier at Hailuogou on the east slope of the Gongga Mountains, Sichuan, China has been retreating continuously, leaving bottom moraines exposed to weathering and soil forming. Then the area is invaded successively by Hippophae rhamnoides L, Populous purdomii Rehder, Abies fabri, and Picea brachytyla, forming a 120 year soil development sequence and plant succession sequence. Besides, the area also contains a rich accumulation of climate data and geological structure data. In this study, six sampling sites were set up in this area, representing 0 yr, 30 yr, 40 yr, 52 yr, 80 yr and 120 yr after the retreat of the glacier, for sampling of soil in the humus horizon and parent material horizon. The soil samples were air-dried and ground to pass a chosen sieve for X-ray diffraction ( XRD ) analysis ( organic matter was removed with H_2O_2 in pretreatment ) to determine qualitatively and quantitatively soil minerals therein in a view to analyzing mineral composition of the soil parent material along the soil chronosequence and variation of the soil minerals with soil development. XRD analysis shows that the soil parent material horizon in the area is quite homogenous, and soil minerals are dominated with silicates ( about 90% ) , including quartz ( 24.5% ),plagioclase ( 28.5% ), K-feldspar, augite, hornblende, biotite, chlorite and vermiculite, and some carbonates , like calcite (<8% ) and dolomite ( <2.3% ),and phosphate mineral apatite (<2.1% ) . However, in some soil samples, some other minerals like pyrite, barites, calcium oxalate, wollastonite and smectite are also detected. The soil in the area is fairly high in content of feldspar, mica and hornblende, which is the feature of entisol. As the pedogenesis proceeds, after 52 years of exposure, calcite in the parent material begins to transform into calcium oxalate. After about 120 years of exposure, biotife or hornblende is very likely to transform into smectite, reducing its content in the soil. The soil in the humus horizon is relatively enriched in felsic minerals ( quartz, plagioclase and K-feldspar ) . Correlation analysis shows that the contents of hornblende, apatite, biotite and chlorite decreased significantly with soil development (p<0.05 ) . Surface vegetation biomass and soil pH are two important factors influencing weathering of surface soil. Plant growth and succession not only directly promotes weathering of the minerals in the surface soil, but also speed up, weathering of hornblende, biotite and chlorite along the soil chronosequence by reducing soil pH. And what is more, only when soil pH is dropped down below 5.5, will it accelerate weathering of apatite. In the end, by comparing the Hailuogou Soil Chronosequence with two similar soil chronosequences in the Alps, this paper deduces that mineral composition of the soil forming parent material may affect development of surface vegetation. The high contents of mafic minerals and apatite in the parent material as well as the warm and cool climate are responsible for the flourishing vegetation along the Hailuogou chronosequence. All the findings and data indicate that apparent weathering occurred at the early soil development stage of the Hailuogou Soil Chronosequence. |
来源
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土壤学报
,2015,52(3):507-516 【核心库】
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DOI
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10.11766/trxb201406180301
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关键词
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土壤矿物
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早期风化过程
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土壤序列
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冰川退缩区
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X射线衍射分析
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地址
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中国科学院水利部成都山地灾害与环境研究所,中国科学院贡嘎山高山生态系统观测试验站, 中国科学院山地表生过程与生态调控重点实验室, 成都, 610041
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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0564-3929 |
学科
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农业基础科学 |
基金
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国家自然科学基金项目
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文献收藏号
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CSCD:5419710
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参考文献 共
28
共2页
|
1.
Larsen I J. Rapid soil production and weathering in the Western Alps, New Zealand.
Science,2014,343(6171):637-640
|
被引
8
次
|
|
|
|
2.
Egli M. Soil formation rates on silicate parent material in alpine environments : Different approaches-different results?.
Geoderma,2014,213:320-333
|
被引
1
次
|
|
|
|
3.
Hausrath E M. Soil profiles as indicators of mineral weathering rates and organic interactions for a Pennsylvania diabase.
Chemical Geology,2011,290(3):89-100
|
被引
2
次
|
|
|
|
4.
Wongfun N. Effect of water regime and vegetation on initial granite weathering in a glacier forefield : Evidences from CL, SEM, and Nomarski DIC microscopy.
Geoderma,2013,211:116-127
|
被引
4
次
|
|
|
|
5.
Egli M. The role of climate and vegetation in weathering and clay mineral formation in late Quaternary soils of the Swiss and Italian Alps.
Geomorphology,2008,102:307-324
|
被引
11
次
|
|
|
|
6.
李福春. 原生硅酸盐矿物风化产物的研究进展——以云母和长石为例.
岩石矿物学杂志,2006,25(5):440-448
|
被引
21
次
|
|
|
|
7.
Arn K.
Geochemical weathering in the sub- and proglacial zone of two glaciated crystalline catchments in the Swiss Alps (Oberaar- and Rhoneglacier),2002
|
被引
1
次
|
|
|
|
8.
Anderson S P. Chemical weathering in the foreland of a retreating glacier.
Geochimica et Cosmochimica Acta,2000,64(7):1173-1189
|
被引
29
次
|
|
|
|
9.
Taylor A. Relation between soil age and silicate weathering rates determined from the chemical evolution of a glacial chronosequence.
Geology,1995,23(11):979-982
|
被引
11
次
|
|
|
|
10.
Starr M. Changes in the rate of release of Ca and Mg and normative mineralogy due to weathering along a 5300-year chronosequence of boreal forest soils.
Geoderma,2005,133:269-280
|
被引
2
次
|
|
|
|
11.
Lessovaia S. Rock control of pedogenic clay mineral formation in a shallow soil from serpentinous dunite in the Polar Urals, Russia.
Applied Clay Science,2012,64:4-11
|
被引
1
次
|
|
|
|
12.
Hilley G E. Competition between erosion and reaction kinetics in controlling silicate-weathering rates.
Earth and Planetary Science Letters,2010,293(1):191-199
|
被引
6
次
|
|
|
|
13.
Mavris C. Weathering and mineralogical evolution in a high Alpine soil chronosequence : A combined approach using SEM-EDX, cathodoluminescence and Nomarski DIC microscopy.
Sedimentary Geology,2012,280:108-118
|
被引
5
次
|
|
|
|
14.
Bernasconi S M. Chemical and biological gradients along the Damma glacier soil chronosequence, Switzerland.
Vadose Zone Journal,2011,10(3):867-883
|
被引
8
次
|
|
|
|
15.
钟祥浩. 贡嘎山地区山地生态系统与环境特征.
人类环境杂志,1999,28(8):648-654
|
被引
12
次
|
|
|
|
16.
He L. Soil development along primary succession sequences on moraines of Hailuogou Glacier, Gongga Mountain, Sichuan, China.
Catena,2008,72(2):259-269
|
被引
15
次
|
|
|
|
17.
Zhou J. Changes of soil phosphorus speciation along a 120-year soil chronosequence in the Hailuogou Glacier retreat area (Gongga Mountain, SW China).
Geoderma,2013,195:251-259
|
被引
24
次
|
|
|
|
18.
何耀灿. 贡嘎山海螺沟冰川地质环境的基本特征.
四川地质学报,1991,11(3):221-225
|
被引
2
次
|
|
|
|
19.
Wilson M J. Weathering of the primary rock-forming minerals : Processes, products and rates.
Clay Minerals,2004,39:233-266
|
被引
16
次
|
|
|
|
20.
刘耕年. 贡嘎山海螺沟冰川沉积特征与冰下过程研究.
冰川与冻土,2009,31(1):68-74
|
被引
8
次
|
|
|
|
|