OXYGEN-ISOTOPE COMPOSITION AND TEMPERATURE OF FLUIDS INVOLVED IN DEPOSITION OF PROTEROZOIC SEDEX DEPOSITS, SUDBURY BASIN, ONTARIO

被引：10

作者：

DAVIES, JF ^{[1
]}

LEROUX, MV ^{[1
]}

WHITEHEAD, RE ^{[1
]}

GOODFELLOW, WD ^{[1
]}

机构：

[1] GEOL SURVEY CANADA, OTTAWA K1A 0E8, ONTARIO, CANADA

来源：

CANADIAN JOURNAL OF EARTH SCIENCES | 1990年 / 27卷 / 10期

关键词：

D O I：

10.1139/e90-139

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Sedex Cu-Pb-Zn deposits in the Sudbury Basin were deposited on the sea floor from fluids in which delta-18O = -1 parts per thousand and at temperatures around 170-degrees-C. Distal Mn-bearing sediments were deposited in seawater in which delta-18O almost-equal-to 3 parts per thousand and at temperatures around 125-degrees-C. The fluids at the vent site (delta-18O almost-equal-to -1 parts per thousand) probably represent a mixture of normal seawater and isotopically positive hydrothermal fluid generated in the substrate by seawater-rock reactions. The heat source responsible for convection and venting onto the sea floor and into the water column was the underlying Sudbury Irruptive, which was emplaced immediately following deposition of the Onaping Formation, directly above which the sedex deposits lie.

引用

页码：1299 / 1303

页数：5

共 15 条

[1] OXYGEN ISOTOPE STUDY OF A PRECAMBRIAN BANDED IRON-FORMATION, HAMERSLEY RANGE, WESTERN-AUSTRALIA [J].