Primary dolostone related to the Cretaceous lacustrine hydrothermal sedimentation in Qingxi sag, Jiuquan Basin on the northern Tibetan Plateau： Discussion  

作　　者：LI Le YAO Guang Qing 

机构地区：[1]Key Laboratory of Tectonics & Petroleum Resources of the Ministry of Education, China University of Geosciences, Wuhan 430074, China [2]Faculty of Resources, China University ofGeosciences, Wuhan 430074, China

出　　处：《Science China Earth Sciences》2016年第4期866-870,共5页中国科学（地球科学英文版）

摘　　要：Recently, a mechanism of hydrothermal sedimentation about a mantel-derived source was proposed to interpret the formation of lacustrine dolostone in the Cretaceous Xiagou Formation based on systematic petrological, mineralogical, and geochemical analyses （Wen et al., 2013）. Similar to the texture found in classic hydrothermal sediments （Zhang, 1988）, the breccia texture is characterized by certain hydro- thermal sedimentation features. With detailed analysis of the data and relevant explanations, however, we found that their data are not sufficient to support the mantle-derived hydrothermal genetic theory because the formation of ex- tensive laminated micritic ferruginous dolostone is not yet fully understood. We will review the model proposed by Wen et al. （2013） focusing on the following issues.Recently,a mechanism of hydrothermal sedimentation about a mantel-derived source was proposed to interpret the formation of lacustrine dolostone in the Cretaceous Xiagou Formation based on systematic petrological,mineralogical,and geochemical analyses(Wen et al.,2013).Similar to the texture found in classic hydrothermal sediments(Zhang,

关 键 词：湖相白云岩 热水沉积 青藏高原北部 白垩系 青西凹陷 酒泉盆地 热液沉积物 地球化学分析 

分 类 号：P588.245[天文地球—岩石学] P618.13[天文地球—地质学]