INDICATIONS OF HYDROTHERMAL ACTIVITY AT THE CHILE RIDGE SPREADING CENTER

被引：6

作者：

MARIENFELD, P ^{[1
]}

MARCHIG, V ^{[1
]}

机构：

[1] BUNDESANSTALT GEOWISSENSCHAFTEN & ROHSTOFFE,W-3000 HANNOVER 51,GERMANY

来源：

MARINE GEOLOGY | 1992年 / 105卷 / 1-4期

关键词：

D O I：

10.1016/0025-3227(92)90191-J

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A small section of the Chile Ridge spreading zone has been investigated. This area is composed of three short spreading segments offset by fracture zones, and this section of the ridge is hydrothermally active. The basalts investigated are of the MORB type and indicate that this part of the Chile Ridge is a normal oceanic spreading zone. A dredge from the spreading axis recovered rock samples containing hydrothermal sulphide lenses enriched in galena. Sediments near the ridge reveal hydrothermal contamination an order of magnitude lower than in the sediments surrounding the southern part of the East Pacific Rise. The hydrothermal material is characterized by strong diagenetic changes which have not been previously reported.

引用

页码：241 / 252

页数：12

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