Premium
Dynamic Mechanism of Migmatization in the Dabie Complex, Northeastern Hubei, China 1
Author(s) -
Jianghai Wang,
Wenhua Yang,
Jinping Wu
Publication year - 1995
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/j.1755-6724.1995.mp8002002.x
Subject(s) - anatexis , plagioclase , metasomatism , migmatite , geochemistry , protolith , geology , mineral , metamorphic rock , partial melting , chemistry , mantle (geology) , paleontology , quartz , organic chemistry , gneiss
On the basis of the detailed field work, compositions and contents of plagioclase and K‐feldspar, determination of ordering degree, statistical analysis of plagioclase elongation index, mass‐balance calculation and mineral spatial distribution and geochemistry, it is concluded that the migmatites in the Dabie complex are characterized by the presence of thermocenters. There are regular changes in mineral character in the migmatites from the centers outwards. The dominant genetic mechanism is anatexis and metasomatism, whose intensities decrease from the centers outwards. Finally, according to the simulated experiment on Liesegang' s rings and non‐linear dynamics (dissipative structure theory), the dynamic mechanism of migmatization is profoundly expouded as consisting of the early‐stage metasomatism induced by the thermal anomaly, the cardinal‐stage anatexis induced by the early‐stage matasomatism and finally the last‐stage post‐anatexis metasomatism.