Geology， Geochemistry and Mineralization of Eclogites in Ultrahigh-Pressure 
Metamorphic Belt in the Northern Jiangsu Province

Abstract

Abstract:

The northern Jiangsu ultrahigh-pressure metamorphic belt is the eastern extending portion of the Qinling-Dabieshan
Orogenic Zone. According to the country rocks， the eclogites occurring in this belt can be classified into three types: G-type in
gneiss, M-type in marble and S-type in serpentinite. Geochemical characteristics of eclogites show that their original rocks are
complicated and related to mafic-ultramafic rocks derived from the lower crust or upper mantle with properties of both continental
and oceanic basalts. The eclogites contain useful compositions and are host rocks of rutile etc. deposits. Mineralization of
rutile in eclogites is mainly related to subduction and collision of the North China Plate with the Yangtze Plate and controlled
by characteristics of lithology, deformation, and metamorphism. The eclogites contain many valuable minerals such as rutile,
ilmenite, apatite, garnet, omphacite and thus have high economic significance for comprehensive utilization.

Key words: Ultra-highpressure metamorphic belt, eclogite, geochemistry, mineralization, comprehensive utilization

CLC Number:

P588.3

HUANG Jian-Ping, MA Dong-Sheng, LIU Cong, WANG Hui. Geology， Geochemistry and Mineralization of Eclogites in Ultrahigh-Pressure
Metamorphic Belt in the Northern Jiangsu Province[J]. J4, 2010, 16(3): 265-280.

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