本文将凡口铅锌矿床中的方解石分为成矿前、成矿期间和成矿后三个阶段。根据化学成分、晶胞参数、物理性质、碳氧同位素、流体包裹体和热发光等方面的研究,得知成矿期间形成的方解石中含有较多的锰;晶轴铰短;比重、硬度和折射率略高;δ(13)C_(PDB)(‰)为-5.25—-8.15;均一温度为163—219℃;人工热发光强度对自然热发光强度比值明显地增大。结果表明,凡口铅锌矿床的成矿与热液作用有关。
Calcites are dominant gangue minerals in the Fankou lead-zinc deposit and were formed at three stages, The studies in such aspects as chemical composition, cell paramQters, physical characters, carbon-oxygen isotopes, fluid inclusions and thermoluminescences demonstrate that the calcite formed dur- . ing the iron-lead-zinc sulfide stage is different from that formed in pre- or post-mineralization periods in that the f ormer contains more manganese and has shorter axes and slightly higher specific Uravity, hardness, and refractive indices. In addition, δ13CpDB(%0)of the former calcite varies from-5.25 to-8.15, homogeneous temperatures range from 163℃ to 219℃，and ATL/NTL ratios are distinctly greater, It is obvious from these results that the mineralization in the Fankou lead-zinc deposit is related to the hydrothermal process.
李荣清, 1988. 粤北凡口铅锌矿床方解石矿物学特征及其与成矿作用的关系[J]. 岩石矿物学杂志, 7(4):347~355.
Li Rongqing, 1988. Mineralogy of Calcite from the Fankou Lead-Zinc Deposit of Northern Guangdong and Its Relationship with Mineralization[J]. Acta Petrologica et Mineralogica, 7(4): 347~355.
