地质学报（英文版）2008，Vol.82Issue(4)：906-910,5.
Magnetite-Fluorite Rock: A New Rock Type of Hot Water Sedimentation
Magnetite-Fluorite Rock: A New Rock Type of Hot Water Sedimentation
摘要
Abstract
The new type hot water sedimentary rock - magnetite-fluorite rock occurs as quasi-layers inflat parts of contact zones between rock body and strata in Bamiaushan of Changshan County,Zhejiang Province, China. The main mineral assemblage is fluorite+magnetite+cassiterite. The rockshows typical laminated structure and obvious mosaic texture. Its formation temperature is between123℃-160℃, averaging at 142℃. The major chemical composition of the rock includes CaF2, SiO2,Al2O3, FeO, and Fe2O3; the high-content microelement association includes W, Sn, Be, Rb, Sr, S, andCl; and the total content of REE is low (∑REE between 35.34x10-6-38.35x10-6), showing LREEenrichment type of distribution pattern. Diagenesis: driven by the tectonic stress, the formation waterheated in the deep strata had moved along the fissures or fractures in strata and had extractedcomponents from the strata on the way, and finally stagnated in the flat parts of contact zones betweenrock body and strata. With drop in temperature, magnetite and fluorite were separated from the hotwater and precipitated alternately, forming this hot water sedimentary rock with new typemineralogical composition, typical laminated structure, obvious mosaic texture and sub-horizontaloccurrence. The characteristics of the new type mineralogical composition, sedimentary tectonicenvironment and chemical composition are different from that of the well-known traditionalhydrothermai sedimentary rocks.关键词
magnetite-fluorite rock, hot water sedimentary rock, hydrothermai sedimentary rock,laminated structure, sedimentary tectonic environment, petrochemistryKey words
magnetite-fluorite rock, hot water sedimentary rock, hydrothermai sedimentary rock,laminated structure, sedimentary tectonic environment, petrochemistry分类
天文与地球科学引用本文复制引用
XU Shaokang,XIA Xuehui,YUAN Congjian,WANG Bingquan,YAN Fei,YAN Shengxian,ZHENG Xingquan..Magnetite-Fluorite Rock: A New Rock Type of Hot Water Sedimentation[J].地质学报（英文版）,2008,82(4):906-910,5.基金项目
This work is supported by the Project of China Chemical Geology and Mine Bureau. （）
