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The Caledonian low Al-TTD series from the Northern Qinling Orogenic Belt: Rock properties, genetic simulation and geological implication

The Caledonian low Al-TTD series from the Northern Qinling Orogenic Belt: Rock properties,... A belt of low Al-Trondhjemite-Tonalite-Diorite (TTD) series has been recognized along the Northern Qinling Orogenic Belt (NQOB), which is dated as 430―399 Ma and characteristic of positive εNd(t) values. Geochemical features and trace elements simulation indicate that the TTD series was probably originated from differently partial melting of tholeiitic rocks from the Erlangping group. Thermodynamic analysis on the residue phases of the partial melting processes suggests that the TTD series may represent a dynamic process of temperature-increasing and pressure-decreasing, indicating an extension and thinning process of a thickened crust. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Science China Earth Sciences Springer Journals

The Caledonian low Al-TTD series from the Northern Qinling Orogenic Belt: Rock properties, genetic simulation and geological implication

Science China Earth Sciences , Volume 48 (11) – Nov 1, 2005

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References (29)

Publisher
Springer Journals
Copyright
Copyright © Science in China Press 2005
Subject
Geosciences; Geosciences, general
ISSN
1674-7313
eISSN
1862-2801
DOI
10.1360/04yd0341
Publisher site
See Article on Publisher Site

Abstract

A belt of low Al-Trondhjemite-Tonalite-Diorite (TTD) series has been recognized along the Northern Qinling Orogenic Belt (NQOB), which is dated as 430―399 Ma and characteristic of positive εNd(t) values. Geochemical features and trace elements simulation indicate that the TTD series was probably originated from differently partial melting of tholeiitic rocks from the Erlangping group. Thermodynamic analysis on the residue phases of the partial melting processes suggests that the TTD series may represent a dynamic process of temperature-increasing and pressure-decreasing, indicating an extension and thinning process of a thickened crust.

Journal

Science China Earth SciencesSpringer Journals

Published: Nov 1, 2005

Keywords: Northern Qinling; Caledonian movement; Erlangping group; TTD series; trace elements simulation; partial melting; isotopic dating; experimental petrology

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