Rare-metal granitoid magmatism of the Altai-Sayan folded region: Age and geological features of manifestation

被引：0

作者：

Dovgal', VN ^{[1
]}

Sotnikov, VI ^{[1
]}

机构：

[1] Russian Acad Sci, Geol Geophys & Mineral Joint Inst, Novosibirsk 630090, Russia

来源：

GEOLOGIYA I GEOFIZIKA | 1998年 / 39卷 / 08期

关键词：

collisional granites; rare-metal composition; radiogenic age; Altai; East Sayan; East Tuva;

D O I：

暂无

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Rare-metal granites are found in two parts of the Altai-Sayan folded region: Altai and the east of the region East Sayan and East Tuva. In Altai they are represented primarily by collisional and postcollisional plumasite types of these rocks, belonging to three age groups: 1) 290-270 Ma (Kalba complex), 2) 260-240 Ma, and 3) 235-183 Ma. In East Sayan and East Tuva, rare-metal granites belong to alkaline varieties dated at 270-220 Ma. Spatially they associate with Middle Paleozoic alkaline and subalkaline erupted rocks. It is shown that the formation of the rare-metal granite association proceeded over a long period.

引用

页码：1085 / 1093

页数：9