Origin of Sulfur and Mode of Gypsum Formation in Central Iraqi Soils
Origin of Sulfur and Mode of Gypsum Formation in Central Iraqi Soils
摘要
The δ18O and 8D values of gypsum crystallization water together with δ18O and 834S of sulfates were used as reliable techniques to study source of sulfur and mode of gypsum formation in selected central Iraqi soils. Six representative pedons on different geologic units were studied. The slope of 3.9 for δ18O and 8D plot of gypsum crystallization water showed that evaporation was the major process of gypsum deposition in the study area. The mean 834S value of ＋17.58 %0 showed that Cretaceous sea sulfate followed by Tertiary is the source of sulfur in studied soils. The heavier 834S value （＋17.58 %0） of the study area compared to central Iran （＋13.5 %） proved that gypsum in central Iraq soils has been formed in the later stage of evaporation and that Iraqi landforms were cut off from the Tethys seaway after central Iran was evolved.
参考文献42
-
1Barzanji AF (1973) Gypsiferous soils in Iraq. PhD Thesis, State University ofGhent, Belgium.
-
2Buck BJ, VanH0esen JG (2005) Assessing the applicability of isotopic analysis ofped0genic gypsum as a paleoclimate indicator, S0uthern New Mexico. J0urnal ofArid Environments 60: 99-114. DOI: 10.1016/j.jaridenv.2004.03. 003.
-
3Claypo0l GE, H0sler WT, Kaplan IR, et al. (1980) The age curves ofsulfur and 0xygen isotopes in marine sulfate and their mutual interpretation. Chemical Geol0gy 28: 199-260. DOI: 10.1016/0009-2541(80)90047-9.
-
4Craig H (1961) Isotopic variations in meteoric waters. Science 133: 1702-1703. DOI: 10.2307/1708089.
-
5Dowu0una GN, Mermut AR, Krouse HR (1992a) Isotopic composition ofsalt crusts in Saskatchewan, Canada. Chemical Geol0gy 94: 205-213. DOI: 10.1016/S0009-2541(10)8OOO5-1.
-
6Dowu0unaGN, 1VIermut AR, Krouse HR (19921)Stable isotopes ofsalts in some acid sulfate soils ofN0rth America. S0il Science S0ciety ofAmerica J0urnal 56: 1646-1653. DOI: 10.2136/sssaj 1992.03615995005600050052x.
-
7Dowu0una GN, Mermut AR, Krouse HR (1992c) Isotopic composition ofhydration water in gypsum and hydroxyl injarosite. S0il Science S0ciety ofAmerica J0urnal 56: 309-313. DOI: 10.2136/sssaj 1992.036159950056000l0049x.
-
8Dowu0una GN, Mermut AR, Krouse HR (1993) Stable isotope geoehemistry ofsulfate in relation to hydrogeol0gy in southern Saskatchewan, Canada. Applied Geochemistry 8: 255-263. DOI: 10.1016/0883-2927(93)90040-N.
-
9Ezwaran H, Barzanji AF (1974) Evidence for the neoformation ofattapulgite in some soils ofIraq. In: Transactions ofthe 10th International Congress ofS0il Science, V.7, 154-161. Nauk, Moscow.
-
10Farpo0r MH, Khademi H, Eghbal MK, Krouse HR (2004) Mode ofgypsum deposition in southeastern Iranian soils as revealed by isotopic composition ofcrystallization water. Geoderma 121: 233-242. DOI: 10.1016/j.geoderma.2003.11. Ol.q .
-
1朱凤霞.山区浅层不均匀地基处理[J].建筑技术开发,2002,29(1):30-31. 被引量：1
-
2丁文凯,盛天宇,盛永锡.地基基础设计案例剖析[J].建筑知识：学术刊,2015,35(B01):128-128.
-
3崔桂梅.用数理统计法分析岩土参数的一些规律[J].河北水利水电技术,1998(1):48-49.
-
4电梯里的阴谋[J].初中全科导学,2010(12):60-60.
-
5电梯里的阴谋[J].另类.惊奇.搞笑,2007(2):96-96.
-
6Ghanim Kadhem Abdulsada,Tawfeeq Wasmi Mohammed Salih.Experimental Study to Evaluate the Performance of Iraqi Passive House in Summer Season[J].Journal of Energy and Power Engineering,2015,9(4):386-392.
-
7冯燕妮,谢志平.不同地质的基坑围护施工技术与运用[J].福建建筑,2010(9):75-79. 被引量：5
-
8罗松恩.静力压桩在不同地质中的应用探讨[J].甘肃科技纵横,2007,36(4):121-121.
-
9汪彪,张婷.多种支护形式在基坑工程中的应用实践[J].西部探矿工程,2004,16(6):7-8.
-
10林细克.高层建筑深基坑处理分析[J].中国新技术新产品,2012(11):83-84. 被引量：1
