作者机构：
[叶勇军; 赵娅利; 谢东; 李向阳; 钟永明; 王立恒] School of Environment Protection and Safety Engineering, University of South China, Hengyang, China;[叶勇军; 丁德馨] Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China
通讯机构：
Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China
作者机构：
[Wen, Xia] Univ South China, Sch Nucl Resources Engn, Hengyang 421001, Peoples R China.;[Wen, Xia; Zhao, Junming; Mason, Roger; Sang, Longkang; Ma, Changqian] China Univ Geosci, State Key Lab Geol Proc & Min Resources, Wuhan 430074, Peoples R China.;[Wen, Xia; Zhao, Junming; Mason, Roger; Sang, Longkang; Ma, Changqian] China Univ Geosci, Sch Earth Sci, Wuhan 430074, Peoples R China.
通讯机构：
[Ma, Changqian] C;China Univ Geosci, State Key Lab Geol Proc & Min Resources, Wuhan 430074, Peoples R China.
关键词：
accreted lapilli;cone-sheets;alkaline ring complex;K-feldspar fractionation;ignimbrite;Houshihushan alkaline ring complex
摘要：
In addition to syenite ring dykes and multiple alkaline granite stocks, the sub-volcanic Houshihushan alkaline ring complex near Shanhaiguan, Qinhuangdao City, contains cone-sheets of two types: a majority filled with granite porphyry and a minority filled with quartz syenite porphyry. Many cone sheets show evidence of multiple magma intrusion events. Some granite porphyry sheets’ multiple chilled margins display magmatic roll structures indicating that turbulent magma flowed up the fractures. In one upward-closing cone-sheet K-feldspar phenocrysts floated up through fluid granite porphyry magma and became concentrated at the top providing direct evidence of shallow-level crystal fractionation, confirmed by published rock analyses. Accreted lapilli with K-feldspar crystal cores occur only in the inner parts of a minority of cone-sheets and field relationships indicate that they must have formed beneath the ground surface. Similar lapilli occur in erupted ignimbrites preserved in the collapsed caldera. Voids between lapilli in cone-sheets indicate the presence of volumes of gas below the surface that could have flowed upwards as fast-moving hot gas streams. We propose a mechanism of formation that began with subterranean magmatic rolls with K-feldspar crystal cores that formed on dyke walls, and became detached. Then they were caught up in rising gas streams and erupted at the surface. Thus accreted lapilli formed underground, were erupted along with blobs of fluid glass in escaping gases, and transported over the surface in nuées ardentes, to settle and cool as ignimbrite flows.
作者机构：
[叶勇军; 王立恒; 曹雅琴; 赵娅利; 范楠彬] School of Environmental Protection and Safety Engineering, University of South China, Hengyang, China;[丁德馨] Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China
通讯机构：
Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China
作者机构：
[杜雪明; Zeng, Sheng; 谭凯旋] School of Nuclear Resources Engineering, University of South China, Hengyang, China;[孙冰] School of Urban Construction, University of South China, Hengyang, China
通讯机构：
School of Urban Construction, University of South China, Hengyang, China
作者机构：
[马华龙; 吴宇琦; 陈胜; 唐振平; Zeng, Tao-Tao; 谢水波; 凌辉] Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang, China;[谢水波] Key Discipline Laboratory of National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China
通讯机构：
Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang, China
作者机构：
[李广悦; 刁宁宁; 王永东; 杜康; 张振远] Key Discipline Laboratory for National Defense of Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang;Hunan;421001, China;School of Nuclear Resources Engineering, University of South China, Hengyang;[李广悦; 刁宁宁; 王永东; 杜康; 张振远] Hunan
作者机构：
[韩世礼] School of Nuclear Resources Engineering, University of South China, Hengyang 421001, China;[张文山; 丁俊; 张术根; 柳建新; 韩世礼] School of Geosciences and Info-Physics, Central South University, Changsha 410083, China;[张文山] Beijing Donia Resources Co., Ltd., Beijing 100012, China
通讯机构：
School of Geosciences and Info-Physics, Central South University, China
作者机构：
[周晨阳; 段晨龙; 赵跃民; 盛成; 蔡鲁惠] School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu, China;[伍玲玲] School of Nuclear Resource Engineering, University of South China, Hengyang, Hunan, China
通讯机构：
School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu, China
作者机构：
[谢水波; 周帅; 王文涛; 唐振平; 马华龙; 高媛媛] Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, Hengyang 421001, China;[谢水波] Key Discipline Lab of National Defence for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, China
通讯机构：
Hunan Provincial Key Laboratory of Pollution Control and Resources Technology, University of South China, China
作者机构：
[丁武; 谭凯旋] School of Nuclear Resources Engineering, University of South China, Hengyang 421001, China;[阳奕汉; 李德; 姚光怀] Tianshan Uranium Corporation, China National Nuclear Corporation, Yining 835000, China
通讯机构：
[Tan, K.] S;School of Nuclear Resources Engineering, University of South China, Hengyang 421001, China
作者机构：
[陈璐] School of Resources and Safety Engineering, Central South University, Changsha, China;[张志军; 陈璐] School of Nuclear Resource Engineering, University of South China, Hengyang, Hunan, China;[臧传伟; 于凤海; 陈璐; 谭云亮; 赵同彬] College of Minging and Safety Engineering, Shandong University of Science and Technology, Qingdao, Shandong, China
通讯机构：
College of Minging and Safety Engineering, Shandong University of Science and Technology, Qingdao, Shandong, China
作者机构：
[李广悦; 扶海鹰; 叶勇军; 丁德馨; 宋键斌; 胡南; 王永东] Key Discipline Lab for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, China
通讯机构：
Key Discipline Lab for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, China
关键词：
铀矿;柱浸;堆浸;数学模型;浸出率
摘要：
针对铀矿堆浸生产中矿堆不同高度上的铀金属浸出存在的延迟现象,采用理论分析和室内柱浸试验研究铀矿浸出试验柱不同高度上铀金属浸出的规律。理论分析将铀矿浸出试验柱沿柱高划分为若干个高度足够小且相等的单元体,使其中单个铀矿石颗粒的浸出符合收缩未反应核扩散控制系统模型,且任意1个单元体内所有铀矿石颗粒反应均匀,不存在延迟现象,进而以1个单元体为目标,根据溶浸剂质量守恒原理,并考虑初始溶浸剂浓度的变化,建立铀矿浸出试验柱不同高度上铀金属浸出的数学模型。采用颗粒半径为2.5 mm 的铀矿石进行串联柱浸试验。然后,采用数学模型对柱浸试验结果进行计算,并将模型计算结果与柱浸试验结果进行比较。研究结果表明:试验柱不同高度上铀金属浸出率存在较大差别,且模型计算值与柱浸试验值具有相同的变化趋势,表明该数学模型能较好地反映铀矿浸出试验柱不同高度上铀金属浸出的延迟规律,可为预测铀矿堆浸不同高度上的浸出率提供重要参考。
通讯机构：
Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China
作者机构：
[王立恒; 钟永明; 范楠彬; 赵娅利; 叶勇军] School of Environment Protection and Safety Engineering, University of South China, Hengyang, China;[叶勇军; 丁德馨] Key Discipline Lab for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, China
通讯机构：
School of Environment Protection and Safety Engineering, University of South China, Hengyang, China
作者机构：
[李广悦; 王永东; 扶海鹰; 宋键斌; 胡南; 丁德馨; 叶勇军] Key Discipline Lab for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, China
通讯机构：
Key Discipline Lab for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, China
