FLUORINE AND BORON GEOCHEMISTRY OF TEKTITES, IMPACT GLASSES, AND TARGET ROCKS

被引:9
作者
MATTHIES, D
KOEBERL, C
机构
[1] UNIV VIENNA,INST GEOCHEM,DR KARL LUEGER RING 1,A-1010 VIENNA,AUSTRIA
[2] UNIV MUNICH,INST MINERAL PETROG,W-8000 MUNICH 2,GERMANY
来源
METEORITICS | 1991年 / 26卷 / 01期
关键词
D O I
10.1111/j.1945-5100.1991.tb01013.x
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
We have analyzed fluorine and boron in nine tektites from all four strewn fields, and in a suite of impact glasses and target rocks from the Zhamanshin and Darwin impact craters, as well as Libyan Desert Glass and Aouelloul impact glass samples. Fluorine and boron are useful indicators for the volatilization and temperature history of tektites and impact glasses. Tektites from different strewn fields show a limited range of F and B contents and have F/B ratios near unity. Most splash-form tektites have lower average F and B contents than Muong Nong type tektites, which is similar to the relation between irghizites and zhamanshinites. The F and B contents in target rocks from the Zhamanshin and Darwin impact craters are similar to normal terrestrial sediments. Fluorine in impact glasses and tektites is more depleted compared to their (known or inferred) target rocks than is boron, which is caused by the higher volatility of F. The F/B ratios therefore decrease with increasing temperature of formation (suggesting that irghizites were formed at a higher temperature than zhamanshinites, and Muong Nong type tektites at a lower temperature than splash-form tektites). Mixing of local country rocks together with partial loss of the volatiles F and B can reproduce the F and B contents of impact glasses.
引用
收藏
页码:41 / 45
页数:5
相关论文
共 32 条
[1]   FLUORINE AND CHLORINE CONTENTS OF TEKTITES [J].
BAILEY, JC .
METEORITICS, 1986, 21 (03) :295-301
[2]   CHEMICAL INVESTIGATION OF AUSTRALASIAN TEKTITES [J].
CHAPMAN, DR ;
SCHEIBER, LC .
JOURNAL OF GEOPHYSICAL RESEARCH, 1969, 74 (27) :6737-+
[3]   TRACE-ELEMENT STUDY OF HIGH-REFRACTIVE AND LOW-REFRACTIVE INDEX MUONG-NONG-TYPE TEKTITES FROM INDOCHINA [J].
GLASS, BP ;
KOEBERL, C .
METEORITICS, 1989, 24 (03) :143-146
[4]  
GOLDBEG RH, 1975, 6TH P LUN SCI C, P2189
[5]  
HOFSTETTER A, 1991, IN PRESS ANALYST
[6]  
JOVANOVIC S, 1974, 5TH P LUN SCI C GEOC, P1685
[7]   DETERMINATION OF BORON AT LOW ABUNDANCE LEVELS IN GEOLOGICAL-MATERIALS WITH A TETRAFLUOROBORATE-SELECTIVE ELECTRODE [J].
KLUGER, F ;
KOEBERL, C .
ANALYTICA CHIMICA ACTA, 1985, 175 (SEP) :127-134
[8]   A COMPARISON BETWEEN TERRESTRIAL IMPACT GLASSES AND LUNAR VOLCANIC GLASSES - THE CASE OF FLUORINE [J].
KOEBERL, C ;
KIESL, W ;
KLUGER, F ;
WEINKE, HH .
JOURNAL OF NON-CRYSTALLINE SOLIDS, 1984, 67 (1-3) :637-648
[9]  
KOEBERL C, 1989, METEORITICS, V24, P287
[10]   IMPACT GLASSES FROM ZHAMANSHIN CRATER (USSR) - CHEMICAL-COMPOSITION AND DISCUSSION OF ORIGIN [J].
KOEBERL, C ;
FREDRIKSSON, K .
EARTH AND PLANETARY SCIENCE LETTERS, 1986, 78 (01) :80-88