叠层石与沉积矿产的关系

本文通过笔者实际考察资料及国内外学者研究资料,综合分析了叠层石与沉积矿产关系的研究现状,探讨了叠层石和造叠层石底栖微生物群落对铁、铜、多金属、磷、锰等矿产的成矿作用。叠层石可以溉括为直接的和间接的两种成矿作用:①叠层石为容矿体,其本身就是一种矿石类型;②叠层石不含矿,其岩礁为矿的间隔体。后者是一种金属硫化物避开叠层石岩礁而在礁侧沉积成巨大的富矿模式。

THE RELATIONSHIP BETWEEN STROMATOLITES AND SEDIMENTARY MINERAL DEPOSITS

Based on the materials collected from our field investigution and the study results by the specialists at home and alroad, this paper introduces the up to date research advancement on the relationship between stromato- lites and the stromatolite-building benthonic microbial communities and the mineralization of Fe, Cu, Mn, polymetals and phosphorus etc. The roles that stromatolites play in mineralization may be considered on both direct and indirect aspect, on one hand, stromatolites are ore containers, so they themselves are a type of ore; on another, stromatolites do not contain any ore, their reefs are the barriers of ore. The latter is an impor- tant rich-ore forming model, which means that, metal sulphides avoided stromatolites to deposit at the flanks of stromatolite bodies and led to the formation of large-scale and roch mineral deposits.