地球学报
地毬學報
지구학보
ACTA GEOSCIENTIA SINICA
2015年
1期
59-65
,共7页
马茹莹%韩凤清%马海州%肖应凯%马云麒%张燕霞%王腾%何蕾%韩继龙%韩耀宗%郭坚峰
馬茹瑩%韓鳳清%馬海州%肖應凱%馬雲麒%張燕霞%王騰%何蕾%韓繼龍%韓耀宗%郭堅峰
마여형%한봉청%마해주%초응개%마운기%장연하%왕등%하뢰%한계룡%한요종%곽견봉
水化学特征%硼同位素%盐湖卤水%可可西里
水化學特徵%硼同位素%鹽湖滷水%可可西裏
수화학특정%붕동위소%염호서수%가가서리
water chemistry characteristics%boron isotope%salt lakes%Hoh Xil
本文主要依据2009—2010年间的考察对可可西里地区盐湖进行了水化学及硼同位素分布特征研究。结果表明，除前人发现的5个盐湖外，可可西里东部新发现的多秀湖、茶错、布查湖和果木错玛德日4个湖泊也属于盐湖；勒斜武担湖为氯化物型盐湖，其余8个盐湖均为硫酸盐型盐湖；盐湖及周围水体皆富集 B、Li 元素，形成以盐湖为中心的含量高值区，且 B-Li 元素对显示出协同消长关系，表明在该地区这两种元素的物质来源、搬运条件及富集环境具有相似性；正热电离质谱法测量结果显示，本区盐湖δ11B 值的变化范围在+4.77‰~+12.52‰之间，远低于海水δ11B值，证明这些盐湖均属陆相成因，与前人对青藏高原地区盐湖成因的研究结果相一致；勒斜武担湖和布查盐湖北部均出露有大量泉水，水化学分析和硼同位素分析数据表明，勒斜武担湖和布查盐湖分别与各自周围的泉水具有同源性，认为这些泉水是这两个盐湖的主要物质来源；根据区域地质构造特征和硼同位素地球化学数据，可判断出新青峰喷泉中的硼主要来自于深部火山岩溶滤。
本文主要依據2009—2010年間的攷察對可可西裏地區鹽湖進行瞭水化學及硼同位素分佈特徵研究。結果錶明，除前人髮現的5箇鹽湖外，可可西裏東部新髮現的多秀湖、茶錯、佈查湖和果木錯瑪德日4箇湖泊也屬于鹽湖；勒斜武擔湖為氯化物型鹽湖，其餘8箇鹽湖均為硫痠鹽型鹽湖；鹽湖及週圍水體皆富集 B、Li 元素，形成以鹽湖為中心的含量高值區，且 B-Li 元素對顯示齣協同消長關繫，錶明在該地區這兩種元素的物質來源、搬運條件及富集環境具有相似性；正熱電離質譜法測量結果顯示，本區鹽湖δ11B 值的變化範圍在+4.77‰~+12.52‰之間，遠低于海水δ11B值，證明這些鹽湖均屬陸相成因，與前人對青藏高原地區鹽湖成因的研究結果相一緻；勒斜武擔湖和佈查鹽湖北部均齣露有大量泉水，水化學分析和硼同位素分析數據錶明，勒斜武擔湖和佈查鹽湖分彆與各自週圍的泉水具有同源性，認為這些泉水是這兩箇鹽湖的主要物質來源；根據區域地質構造特徵和硼同位素地毬化學數據，可判斷齣新青峰噴泉中的硼主要來自于深部火山巖溶濾。
본문주요의거2009—2010년간적고찰대가가서리지구염호진행료수화학급붕동위소분포특정연구。결과표명，제전인발현적5개염호외，가가서리동부신발현적다수호、다착、포사호화과목착마덕일4개호박야속우염호；륵사무담호위록화물형염호，기여8개염호균위류산염형염호；염호급주위수체개부집 B、Li 원소，형성이염호위중심적함량고치구，차 B-Li 원소대현시출협동소장관계，표명재해지구저량충원소적물질래원、반운조건급부집배경구유상사성；정열전리질보법측량결과현시，본구염호δ11B 치적변화범위재+4.77‰~+12.52‰지간，원저우해수δ11B치，증명저사염호균속륙상성인，여전인대청장고원지구염호성인적연구결과상일치；륵사무담호화포사염호북부균출로유대량천수，수화학분석화붕동위소분석수거표명，륵사무담호화포사염호분별여각자주위적천수구유동원성，인위저사천수시저량개염호적주요물질래원；근거구역지질구조특정화붕동위소지구화학수거，가판단출신청봉분천중적붕주요래자우심부화산암용려。
A study of the hydrochemical characteristics and boron isotope distribution of salt lakes in Hoh Xil region was conducted on the basis of the survey in 2009 and 2010. Besides the Mingjing Lake, Xijinwulan Lake, Lexiewudan Lake, Salt Lake and Cangcuo Lake discovered earlier, the Duoxiu Lake, Chacuo Lake, Bucha Lake and Guomucuomaderi Lake are all salt lakes discovered recently, whose salinities are equal to or higher than 50 g/L. These discoveries have brought the total number of salt lakes in this region to 9. Except for the Lexiewudan salt lake, which is of the chloride type, the remaining 8 salt lakes are of the sulfate type; the boron and lithium are both abundant in the lake water and surrounding waters, and B-Li elements indicate a collaborative growth and decline relationship, suggesting that the material sources, migration conditions and enrichment environment of B is similar to characteristics of Li in this area. The results of Positive Thermal Ionization Mass Spectrometry measurements show thatδ11B values are in the range of +4.77‰~+12.52‰, by far lower than the values of seawater, implying that these salt lakes belong to terrigenous nature, which is consistent with the results of previous research on these areas. There are a large number of springs exposed on the northern bank of the Lexiewudan salt lake and Bucha salt lake, and the springs are the primary material sources of these two lakes according to hydrochemical and boron isotopic analysis. The regional tectonic features and boron isotope geochemistry characteristics reveal that the boron element in the Xinqingfeng hot spring is mainly from lixiviation of volcanic rocks in the depth.
