Karst bauxite deposits in the Zagros Mountain Belt, Iran

被引：77
|
作者：
Zarasvandi, A. [1 ]
Charchi, A. [1 ]
Carranza, E. J. M. [2 ]
Alizadeh, B. [1 ]
机构：
[1] Shahid Chamran Univ, Dept Geol, Ahvaz, Iran
[2] Int Inst Geoinformat Sci & Earth Observat ITC, Dept Earth Syst Anal, Enschede, Netherlands
来源：
ORE GEOLOGY REVIEWS | 2008年 / 34卷 / 04期
关键词：
Karst bauxites; Al-rich limestones; Authigenic; Zagros Mountain Belt; Iran;
D O I：
10.1016/j.oregeorev.2008.05.005
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
More than 190 occurrences of bauxitic-lateritic deposits were investigated in seven areas within the Zagros Simply Folded Mountain Belt in southwestern of Iran. The bauxitic horizons are situated in eroded major NW-SE trending anticlines and occur in karst cavities near or at the boundary between the Sarvak and Ilam Formations. Uplift in the Cenomanian-Turanian period had exposed the Sarvak limestone to karst weathering and, during a period of unconformity, layers of ferruginous-argillaceous limestone debris developed and accumulated on its surface. The ferruginous-argillaceous debris was partly converted to bauxite. Folding and faulting in Oligocene-Miocene time, with ensuing erosion, exposed the bauxitic horizons on the limbs and cores of anticlines. The karst bauxite deposits are probably of authigenic origin, as evidenced by their lithologic associations, textural and mineralogy. (C) 2008 Elsevier B.V. All rights reserved.
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页码：521 / 532
页数：12
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