High heat flow in the Trans-Hudson Orogen, Central Canadian Shield

被引：28

作者：

Guillou-Frottier, L ^{[1
]}

Jaupart, C ^{[1
]}

Mareschal, JC ^{[1
]}

Gariepy, C ^{[1
]}

Bienfait, G ^{[1
]}

Cheng, LZ ^{[1
]}

Lapointe, R ^{[1
]}

机构：

[1] INST PHYS GLOBE, F-75252 PARIS 05, FRANCE

来源：

GEOPHYSICAL RESEARCH LETTERS | 1996年 / 23卷 / 21期

关键词：

D O I：

10.1029/96GL02895

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Nine new heat flow and heat production measurements are-presented for the Trans-Hudson Orogen, an Early Proterozoic Province between the Archean Superior and Hearne Provinces of the Canadian Shield. Seventeen heat flow values now available in this region range between 23 and 81 mW.m(-2). The highest value is anomalous and is due to heat refraction effects in and around highly conducting quartzite formations. When refraction effects are accounted for, the Flin Flon and Thompson belts appear as distinct crustal blocks with different mean heat flow values of 42 +/- 3 (s.d.) mW.m(-2) and 54 +/- 8 (s.d.) mW.m(-2). Such differences can be accounted for by variations in the amount of felsic rocks in the uppermost 15 km of the crust. Comparison between heat flow and elastic thickness studies show that variations in elastic thickness of the lithosphere are not thermally induced.

引用

页码：3027 / 3030

页数：4

共 11 条

[1]

[Anonymous], 1990, EARLY PROTEROZOIC T

[2] HEAT-FLOW AND HEAT-GENERATION IN THE CHURCHILL PROVINCE OF THE CANADIAN SHIELD, AND THEIR PALEOTECTONIC SIGNIFICANCE [J].