Petrology and geochemistry of the Shilu Fe-polymetallic ore deposit in Hainan Province of South China:Implications for the origin of Neoproterozoic BIFs
The Shilu Fe-polymetallic ore deposit,a famous hematite-rich Fe-ore deposit,is situated at the western Hainan Province of south China.The deposit characterizes the upper Fe ores and the lower Co-Cu ores,which are mainly hosted within a low-grade to medium-grade,dominantly submarine metamorphosed siliciclastic and carbonate sedimentary succession of the Neoproterozoic Shilu Group.Three facies types of metamorphosed BIFs,i.e.the oxide facies,the silicate-oxide facies and the sulfide-carbonate facies BIFs,are identified within the sixth sequence of the Shilu Group.The oxide facies BIF (i.e.the Fe-rich itabirites or ores) consists of alternating hematite-rich microbands with quartz-rich microbands; the silicate-oxide facies BIF (i.e.the Fe-poor itabirites or ores) comprises alternating millimeter- to a few tens meter-scale,magnetite-hematite-rich bands with calcsilicate-rich (garnet + actinolite + diopside + epidote + quartz) meso- to microbands; and the sulfide-carbonate facies BIF (i.e.the Co-Cu ores) contains alternating macro- to mesobands of Co-bearing pyrite and pyrrhotite,and chalcopyrite with mesobands of dolomite + calcite + diopside + quartz and/or chlorite + sericite + quartz.The blastooolitic,blastopelletoid blastocolloidal and blastopsammitic textures,and blasobedding structures which most likely represent primary sedimentation are often observed in these BIF facies.The interbedded host rocks with the BIFs mainly are the pyroxene-amphibole rocks and the banded or impure dolostones,and also contain banded or laminated structures,and lepido-gra-noblastic,nematoblastic and/or blastoclastic textures.
Metamorphosed Neoproterozoic Lake Superior-type BIFs protoliths continent marginal marine basin Shilu Fe-polymetallic ore deposit Hainan Province of South China
Deru Xu Zhilin Wang Jianxin Cai Chuanjun Wu Wangwei Fu Nonna Bakun-Czubarow
CAS Key Laboratory of mineralogy and metallogeny, Guangzhou Institute of Geochemistry, Chinese Acade CAS Key Laboratory of mineralogy and metallogeny, Guangzhou Institute of Geochemistry, Chinese Acade South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510640, China Institute of Geological Sciences, Polish Academy of Sciences, Warsaw 00-818, Poland
国内会议
贵阳
英文
139-140
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）