全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
环境化学  2015 

热带花岗岩海岛的化学风化及其环境效应——以东澳岛为例

Keywords: 热带花岗岩海岛,化学风化,环境效应,东澳岛

Full-Text   Cite this paper   Add to My Lib

Abstract:

通过对珠江口花岗岩海岛-东澳岛小流域水体离子的实测分析,揭示海岛小流域的离子来源与贡献量,获得在相对封闭环境下的热带海岛地区花岗岩小流域的化学风化速率及过程对大气CO2的年消耗量.研究表明,东澳岛溪水总体为弱碱性,总溶解固体均值为68.14mg·L-1,远低于世界河流均值,非汛期溶解固体和电导率均高于汛期.溪水离子组成以Cl-、溶解Si、Na+以及HCO3-为主,体现了海盐沉降和硅酸盐岩化学风化过程对溪水化学组成的共同影响.东澳岛岩石化学风化速率和CO2消耗通量分别为1.09×104kg·km-2·a-1和1.12×105mol·km-2·a-1,均低于世界河流均值,主要是由于花岗岩抗风化能力较强所致.广东省热带花岗岩海岛年碳汇消耗CO2约5218t,因此保护海岛表层土壤和生态环境对海岛的碳汇作用具有重要意义.

References

[1]  Berner R A. The phanerozoic carbon cycle: CO2 and O2[M]. New York: Oxford University Press, 2004
[2]  Berner R A, Lasaga A C, Garrels R M. The carbonate-silicate geochemical cycle and its effect on a atmosphere carbon dioxide over the past 100 million years[J]. Am J Sci, 1983,283:641-683
[3]  Berner R A, Canfield D E. A new modele for atmosphereic oxygen over phanerozoic time[J]. Am J Sci, 1989,289:333-361
[4]  Volk T. Feedbacks between weathering and atmospheric CO2 over the last 100 million years[J]. Am J Sci, 1987, 287: 763-779
[5]  Meybeck M. Total mineral dissolved transport by world major rivers[J]. Hydrological-Sciences-Bulletin-des,Sciences Hydrologiques,1976,(126):265-282
[6]  Schwartzman D W, Volk T. Biotic enhancement of weathering and the habit-ability of Earth[J]. Nature, 1989,340:457-460
[7]  Probst J L, Amiotte S P, Tardy Y. Global continental erosion and fluctuations of atmospheric CO2 consumed during the last 100 years[C]//Kharaka Y K, Maest A (eds.) Proc 7th Int Symp. W R I. Park City, Utah, USA, Balkema, Rotterdam, 1992: 483-486
[8]  Probst J L, Mortatti J, Tardy Y.Carbon river fluxes and weathering CO2 consumption in the Congo and Amazon river basin[J]. Applied Geochemistry,1993,9:1-13
[9]  White A F. Natural weathering rates of silicate minerals. In surface and ground water, weathering and soils(ed.J.I.Drever)[J]. Treaties on Geochemistry,2003,5:133-168
[10]  Paces T.Rate constants of dissolution derived from the measurements of mass balance in hydrological catchments[J]. Geochim Cosmochim Acta,1983, 47(11):1855-1863
[11]  Meybeck M.Carbon, Nitrogen, and phosphorus transport by world rivers[J]. Am J Sci,1982,282:401-450
[12]  Canfield D E.The geochemistry of river particulates from the continental USA: major elements[J]. Geochim Cosmochim Acta,1997, 61:3349-3365
[13]  Suchet P S, Probst J L.Modeling of atmospheric CO2 consumption by chemical weathering of rocks: Application to the Garonne, Congo and Amazon basins[J].Chem Geol, 1993,107:205-210
[14]  Suchet P S, Probst J L.A global model for present-day atmospheric/soil CO2 consumption by chemical erosion of continental rocks[J].Tellus, 1995,47B:273-280
[15]  韩贵琳.贵州喀斯特地区河流的研究——碳酸盐岩溶解控制的水文地球化学特征[J].地球科学进展,2005,20(4):394-406
[16]  Gao Q, Tao Z. Chemical weathering and chemical runoffs in the seashore granite hills in South China[J]. Science China: Earth Sciences, 2010,53(8): 1195-1204
[17]  Dalai T K, Krishnaswami S, Sarin M M.Major ion chemistry in the headwaters of the Yamuna river system: Chemical weathering, its temperature dependence and CO2 consumption in the Himalaya. Geochim[J].Cosmochim Acta, 2002,66:3397-3416
[18]  Gaillardet J, Dupre B, Louvat P, et al.. Global silicate weathering and CO2 consumption rates deduced from the chemistry of large rivers[J]. Chemical Geology,1999,159:3-30
[19]  Xu Z F, Liu C Q. Chemical weathering in the upper reaches of Xijiang River draining the Yunnan-Guizhou Plateau, Southwest China[J]. Chemical Geology, 2007,239: 83-95
[20]  Han G L, Liu C Q. Water geochemistry controlled by carbonate dissolution: A study of the river water draining karst-dominated terrain, Guizhou Province, China[J]. Chemical Geology, 2004, 204: 1-21
[21]  Meybeck M.Global chemical weathering of surficial rocks estimated from river dissolved loads[J]. Am J Sci,1987,287: 401-428
[22]  Gao Q Z, Tao Z, Huang X K, et al. Chemical weathering and CO2 consumption in the Xijiang River basin, South China[J]. Geomorphology, 2009, 106: 324-332
[23]  孙媛媛,季宏兵,罗建美,等.赣南小流域的水文地球化学特征和主要风化过程[J].环境化学,2006,25(5):550-557
[24]  李晶莹,张经.流域盆地的风化作用与全球气候变化[J].地球科学进展,2002,17:411-419
[25]  黄来明,张甘霖, 杨金玲.亚热带典型花岗岩小流域径流化学特征与化学风化[J].环境化学,2012,31(7):973-980
[26]  Louvat P, Allegre C J. Present denudation rates on the island of Reunion determined by river geochemistry: Basalt weathering and mass budget between chemical and mechanical erosions[J]. Geochimica et Cosmochimica Acta, 1997, 61: 3645-3669
[27]  Rad S, Louvat P, Gorge C, et al. River dissolved and solid loads in the Lesser Antilles: New insight into basalt weathering processes[J]. Journal of Geochemical Exploration, 2006,88: 308-312
[28]  Sun H G, Han J T, Li D, et al.Chemical weathering inferred from riverine water chemistry in the lower Xijiang basin, South China[J]. Science of the Total Environment,2010,408: 4749-4760
[29]  Das A, Krishnaswami S, Sarin M M, et al.Chemical weathering in the Krishna Basin and Western Ghats of the Deccan Traps, India: Rates of basalt weathering and their controls[J]. Geochimica et Cosmochimica Acta,2005, 69: 2067-2084
[30]  Mortatti J, Probst J L. Silicate rock weathering and atmospheric/soil CO2 uptake in the Amazon basin estimated from river water geochemistry: Seasonal and spatial variations[J]. Chemical Geology, 2003,197: 177-196
[31]  李甜甜, 季宏兵, 江用彬,等.赣江上游河流水化学的影响因素及DIC来源[J].地理学报,2007, 62(7): 764-775
[32]  Picouet C, Dupré B, Orange D, et al. Major and trace element geochemistry in the upper Niger river(Mali):Physical and chemical weathering rates and CO2 consumption [J]. Chemical Geology, 2002,185: 93-124
[33]  Huh Y S, Edmond J M. The fluvial geochemistry of the rivers of Eastern Siberia: Ⅲ. Tributaries of the Lena and Anabar draining the basement terrain of the Siberian Craton and the Trans-Baikal Highlands[J]. Geochimica et Cosmochimica Acta, 1999,63: 967-987

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133