文献类型：期刊文献

英文题名：Zircon U-Pb dating and whole-rock elemental geochemistry of the Shazi anatase deposit in Qinglong, Western Guizhou, SW China

作者：Sun, Jun Zhao Jingyu Nie, Aiguo

第一作者：孙军;Sun, Jun

通信作者：Nie, AG[1]

机构：[1]Guizhou Univ, Coll Resource & Environm Engn, Guiyang 550025, Guizhou, Peoples R China;[2]Guizhou Inst Technol, Coll Resource & Environm Engn, Guiyang 550003, Guizhou, Peoples R China;[3]Chinese Acad Sci, Key Lab High Temp & High Pressure Study Earths In, Inst Geochem, Guiyang 550081, Guizhou, Peoples R China

第一机构：Guizhou Univ, Coll Resource & Environm Engn, Guiyang 550025, Guizhou, Peoples R China

通信机构：corresponding author), Guizhou Inst Technol, Coll Resource & Environm Engn, Guiyang 550003, Guizhou, Peoples R China.|贵州理工学院资源与环境工程学院;贵州理工学院;

年份：2017

卷号：36

期号：2

起止页码：329-338

外文期刊名：ACTA GEOCHIMICA

收录：EI(收录号：20172103691127);Scopus(收录号：2-s2.0-85019922199);WOS:【ESCI(收录号:WOS:000405285500019)】；

基金：We thank the editors and the reviewers very much for their constructive comments that have greatly improved this manuscript. This study was supported by the Natural Science Foundation of China (Grant No. 41262005).

语种：英文

外文关键词：Anatase deposit; Zircon U-Pb; Emeishan basalt; Karst terrain

摘要：The Shazi deposit is a large-scale anatase deposit in Qinglong, Guizhou Province. Zircon grains from this deposit yielded a zircon U-Pb age of similar to 259 Ma, representing the formation age of the deposit's parent rocks. This age is identical to the eruption age of the Emeishan large igneous province, indicating a synchronous magmatic event. The rare-earth-element patterns of laterite samples were similar to those of the weathered basalt sample, and sub-parallel to those of the Emeishan high-Ti basalts, implying a genetic relationship between the laterite and the basalt. The Chemical Index of Alteration values of laterite ranged from 96 to 98, suggesting a high degree of weathering. SiO2, MgO, and alkaline metal elements decreased with increasing degree of weathering, while Al2O3, Fe2O3, and TiO2 increased. We found the highest TiO2 in laterite and the lowest in pillow basalts, indicating that Ti migrated from basalt to laterite. Our U-Pb dating and whole-rock elemental geochemistry analyses suggest that the Emeishan basalt is the parent rock of the Shazi anatase ore deposit. Based on our analysis, we propose a metallogenic model to explain the ore-forming process, in which the karst terrain formed by the Emeishan mantle plume and the subsequent basaltic magma eruption were the key factors in the formation the Shazi anatase ore deposit.