SHRIMP U-Pb zircon dating of Pedras Grandes Suite, southern Santa Catarina State, Brazil

被引：10

作者：

Jelinek, AR

Bastos-Neto, AC

Leite, JAD

Hartmann, UA

McNaughton, NJ

机构：

[1] Univ Fed Rio Grande do Sul, Inst Geociencias, BR-91500000 Porto Alegre, RS, Brazil

[2] Univ Fed Mato Grosso, Dept Recoursos Minerais, BR-78060900 Cuiaba, MT, Brazil

[3] Univ Western Australia, Ctr Global Metallogeny, Nedlands, WA 6907, Australia

来源：

ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS | 2005年 / 77卷 / 01期

关键词：

SHRIMP; Pedras Grandes Suite; zircon; geochronology; fluorite;

D O I：

10.1590/S0001-37652005000100010

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Two major magmatic pulses of the granitic Florianopolis Batholith in Santa Catarina State. southern Brazil, occurred between 613 +/- 5 Ma and 595 +/- 5 Ma, during the Neoproterozoic Brasiliano Cycle. These ages were obtained by U-Pb isotopic determinations with the sensitive high mass-resolution ion microprobe on igneous zircons from Pedras Grandes Suite in Santa Catarina State. Euhedral zircons remained unaltered close to a fluorite vein deposited at 180degreesC or more. These ages suggest a northern limit for the Pedras Grandes; Suite, explaining the spatial relationship between the fluorite veins and the source rock.

引用

页码：125 / 135

页数：11

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