|
|
|
| The Characteristics of Geochemistry and Sedimentary of Surface Soil in the Salt Lakes of Lop Nor |
| Xu Li1, Li Yanhong1, Yang Jiaquan2 |
1. Xinjiang Laboratory of Lake Environment and Resources in Arid Area/College of Geographic Science and Tourism, Xinjiang Normal University, Urumqi 830054, China;
2. No.6 Geological Party, BGMRED of Xinjiang, Hami 839000, Xinjiang, China |
|
|
|
|
Abstract The characteristics of magnetic and grain-size and geochemistry in surface soil of the Lop Nor area were investigated. The results showed that: (1)All samples of Magnetic mineral content were lower;there are obviously different magnetic susceptibility in different places, the maximum value of magnetic susceptibility was 2.1×10-7 m3·kg-1 in the Aqike Valley West, the minimum value was 0.47×10-7 m3·kg-1 in the helix region, overall, the magnetic susceptibility values of the eastern was slightly higher than the western in the Lop Nor Area. (2)Component of grain size in the sample was mainly silt sand (2-63 μm), the average wass 74.17%, poorly sorted,dominate particles was fine particles,and there were small magnitude changes between each particle size fractions. (3)Soluble salts were mainly composed of Cl-, SO42-, Na+ and K+, Mg2+, Ca2+ were lower content, and the lowest were HCO3- and CO32-, the soluble salt type was mainly Cl--SO42--Na+ and K+; the average content of TOC was about 0.66%, the pH value ranged between 6.98-8.0, there were in alkaline environment, and the values in the helix region were higher than in west of Aqike Valley. To sum up, the area of climate had shifted to the drought trend, and continuous dry climate and supply variation had certain effect on the material form, this would be the main cause of the material distribution in this area.
|
|
Received: 16 September 2013
Published: 20 November 2014
|
|
|
|
Corresponding Authors:
李艳红(Email:lyh0704@126.com)
E-mail: lyh0704@126.com
|
[1] 胡东生.盐湖地学的研究进展和发展方向[J].地球科学进展,1997,12(5):411-414.
[2] 刘成林,王弭力,焦鹏程,等.罗布泊盐湖钾盐矿床分布规律及控制因素分析[J].地球学报,2009,30(6):796-802.
[3] 马黎春,李保国,蒋平安,等.罗布泊“大耳朵”湖区钾元素地球化学与富集机理[J].矿床地质,2010,29(4):616-624.
[4] 刘成林,焦鹏程,王弭力,等.新疆罗布泊第四纪盐湖上升卤水流体及其成钾意义[J].矿床地质,2003,22(4):386-392.
[5] 胡东生,张华京.罗布泊第四系湖泊沉积序列及钾盐资源的形成[J].海洋与湖沼,2007,38(3):279-288.
[6] 刘成林,陈永志,陈伟十,等.罗布泊盐湖更新世晚期沉积钙芒硝包裹体特征及古气候意义探讨[J].矿物学报,2006,26(1):93-98.
[7] 刘成林,焦鹏程,陈永志,等.罗布泊盐湖晚更新世末期芒硝岩沉积及其古气候意义[J].地球学报,2008,29(4):397-404.
[8] 赵元杰,夏训诚,王富葆,等.罗布泊现代盐壳地貌特征与成因初步研究[J].干旱区地理,2005,28(6):795-799.
[9] 赵元杰,夏训诚,王富葆,等.新疆罗布泊环状盐壳的特征与成因[J].干旱区地理,2006,29(6):779-783.
[10] 王永,赵振宏,林景星.罗布泊AK1孔沉积物地球化学组成与古气候[J].地球学报,2004,25(6):653-658.
[11] 罗超,杨东,彭子成.新疆罗布泊地区近3.2万年沉积物的气候环境记录[J].第四系研究,2007,27(1):114-121.
[12] 罗超,彭子成,杨东,等.多元地球化学指标指示的32-9 ka B.P.罗布泊地区环境极其全球变化的响应[J].地球化学,2008,37(2):139-148.
[13] 张卫国,俞立中,许羽.环境磁学研究的简介[J].地球物理学进展,1995,10(3):95-105.
[14] Peters C,Dekkers M J.Selected room temperature magnetic parameters as a function of mineralogy,concentration and grain size[J].Physics and Chemistry of the Earth,Parts A/B/C,2003,28(16/19):659-667.
[15] 王永,林景星,赵振宏.罗布泊八一泉剖面的地层时代与环境[J].地球学报,1999,20(增刊):147-151.
[16] McCave I N,Syvitski J P M.Principle and methods of geological particle size analysis[J].New York,USA:Cambridge University Press,1991:3-21.
[17] 李继彦,董治宝.察尔汗盐湖雅丹地貌沉积物粒度特征研究[J].中国沙漠,2012,32(5):1187-1192.
[18] 罗超,彭子成,刘卫国,等.新仙女木事件在罗布泊湖相沉积物中的记录[J].地球科学,2008,32(3):303-312.
[19] 王秋良,袁胜元,李长安.江汉平原江陵剖面有机碳含量、碳同位素和磁化率的古气候意义[J].地质科技情报,2006,25(4):59-62.
[20] Collinson D W.Methods in Rock Magnetism and Paleomagnetism[M].London,UK:Chapman and Hall,1983:21-33.
[21] 王永,赵振宏.罗布泊东部阿奇克谷地第四纪古地理[J].古地理学报,2001,3(2):23-28.
[22] 罗超,刘卫国,鹏子成,等.新疆罗北洼地湖相沉积物有机碳同位素的变化序列及其古环境意义[J].第四纪研究,2008,28(4):621-628.
[23] 蒲阳,张虎才,陈光杰,等.干旱盆地古湖相沉积物生物标志物分布特征及环境意义——以柴达木盆地为例[J].中国沙漠,2013,33(4):1019-1026.
[24] 吉力力·阿不都外力,米热班阿布里米提,刘京伟,等.艾比湖干涸湖底不同景观类型下富盐沉积物盐分积聚特征[J].中国沙漠,2013,33(5):1426-1432. |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
2014, Vol. 34 
