THE PB/PB AGE OF THE MINAS SUPERGROUP CARBONATE ROCKS, QUADRILATERO FERRIFERO, BRAZIL

被引：150

作者：

BABINSKI, M

CHEMALE, F

VANSCHMUS, WR

机构：

[1] UNIV SAO PAULO, IPEN CNEN SP, BR-05499 SAO PAULO, BRAZIL

[2] UNIV KANSAS, DEPT GEOL, ISOTOPE GEOCHEM LAB, LAWRENCE, KS 66045 USA

[3] UNIV VALE RIO DOS SINOS, DEPT GEOL, SAO LEOPOLDO, RS, BRAZIL

来源：

PRECAMBRIAN RESEARCH | 1995年 / 72卷 / 3-4期

关键词：

D O I：

10.1016/0301-9268(94)00091-5

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Pb/Pb isochron ages determined on carbonate rocks from the Minas Supergroup, Quadrilatero Ferrifero (QF), show that the deposition of the Gandarela Formation, the intermediate unit of the Minas Supergroup, took place at 2420 +/- 19 Ma. The entire sedimentary sequence and underlying basement rocks have been deformed at a regional scale, and data from greenschist facies carbonate rocks from the Piracicaba Group indicate that the Pb isotopes were reset at about 2100 Ma. This age is in agreement with whole-rock Rb/Sr and U/Pb titanite ages determined by many authors for metamorphism of the surrounding Archean granite-gneiss terrane.

引用

页码：235 / 245

页数：11

共 27 条

[1]

BABINSKI M, 1993, THESIS U SAO PAULO S

[2]

BABINSKI M, 1991, 3 AN C BRAS GEOQ SAO, P628

[3]

BABINSKI M, 1991, 1991 EOS T AM GEOP S, V72, P531

[4] THE TECTONIC EVOLUTION OF THE QUADRILATERO FERRIFERO, MINAS-GERAIS, BRAZIL [J].

CHEMALE, F ;

ROSIERE, CA ;

ENDO, I .

PRECAMBRIAN RESEARCH, 1994, 65 (1-4) :25-54

[5]

CORDANI UG, 1980, AN ACAD BRAS CIENC, V52, P785

[6]

CORDANI UG, 1989, 21 SEM EST SOC INT C, V21, P27

[7]

Dardenne M.A., 1975, REV BRAS GEOCIENCIAS, V5, P99

[8]

DEALMEIDA FFM, 1977, REV BRASILEIRA GEOCI, V7, P349

[9]

DORR JVN, 1969, 641A US GEOL SURV PR

[10]

GARCIA AJV, 1988, ACTA GEOL LEOPOLDENS, V11, P83

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