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GEOCHRONOLOGY AND STRONTIUM,NEODYMIUM ISOTOPE OF MANTLE-DERIVED MAGMATITES FROM THEBU′S GOLD DEPOSIT, NORTHERN XINJIANG,CHINA
Ist Teil von
大地构造与成矿学：英文版, 1995 (1), p.54-62
Erscheinungsjahr
1995
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
Bu’s gold deposit is geographically situated in the northern side of Sawuer Mt., Western Jungar. Magmatites in Bu’s deposit including extrusive and intrusive rocks are widespread and have genetic relationship with the deposit. One volcanic suite and two intrusives are studied here. Extrusive products were formed in the Early Carboniferous with a whole-rock Rb-Sr isochron age of 347 Ma and fossil ages, while intrusions have Rb-Sr isochron ages from 310 to 329 Ma and are intrusive into the Lower Carboniferous and Upper Devonian.The isotope parameters I ranges from 0. 7037 to 0. 7046, from -5. 65~+6.67 and more,goes from +5. 65~ +7. 96, displaying that they have similar material sources and are derived from mantle magmas or their derivatives. The continental crust of Zhaisang diwa region may be initially formed in the Late-Proterozoic or even more earlier and grew probably in terms of non-proportionated model like S. China, N. American and other parts in the world.