河北高板河铅锌硫铁矿矿床黄铁矿生物组构与微生物成矿初探

MICROORGANIC MINERALIZATION WITH REFERENCE TO THE BIOTEXTURES OF METALLIC SULFIDES FROM GAOBANHE DEPOSIT,HEBEI

高板河铅锌硫铁矿矿床是华北地台北缘成矿带内大型矿床之一。作者在研究该矿床时发现大量黄铁矿生物组构，并以菌藻类矿化组构为主。该文通过黄铁矿生物组构及含矿建造内有机碳、硫同位素、微量元素等特征的研究，探讨生物组构与微生物成矿的关系。研究认为，微生物在成矿过程中起了聚铁造硫作用，成矿与硫酸盐被还原后产生的Ｈ＿２Ｓ的交代作用有关，矿床属生物化学沉积矿床。

Gaobanhe lead-zinc-pyrite deplsit is one of the large metallic sulfide deposits in the metallogenic belt along the northern margin of North China platform. It is associated with the black manganiferous shale-carbornate rocks of the middle Proterozoic Gaoyuzhuang group,While the deposit was investigated,biotextural pyrites were recognized and pyrite of thallogentexture was picked out for study in terms of mineralization, organisms,sulfur isotopes and trace elements in order to find out how microorgan ic activites were linked with metallogenesis.The conclusion is concentration of iron In between,production of sulfur directly and indirectly depended on mi-croorgenesis.and organic reductions and H_2O-metasomatism,eventully led to the formation of the deposit, in other words, Gaobanhe deposit is probably a product of biochemical processes.