Abstract—

The geological position and mineral composition of specific troilite–quartz rocks (klyuchevites) are considered. They form separate interbeds among deep-water Silurian–Early Devonian Bulatovo carbonaceous–quartz sequences in the Aramil–Sukhtelinsky zone of the Southern Urals. In some areas, these sequences contain basaltic lava units. Klyuchevites are unique rocks due to the large amount of troilite and unusually wide range of minerals and varieties (no less than 50) they contain, many of which are new to the Urals. Initially, klyuchevite was a silica gel likely deposited on the bottom of the basin from hot springs (hydrothermal waters and smoker fumes) and finest iron sulfide (troilite) plates, authigenic grains of other sulfides, complex oxides (V, Ti, Fe, Cr, Zn, and Mn), rare V-bearing mica segregations (roscoelite and segedinite), quartz and plagioclase fragments, separate grains of zircon, monazite-(Ce), xenotime-(Y), rutile, manganilmenite, apatite, etc., of terrigenous origin, which fell into the silica gel. Subsequently, after lithification, this rock underwent intensive crushing and redeposition in the form of interbeds similar in composition and appearance to quartzites. Klyuchevite is an example of lithified sediments from material erupted by black smokers at the bottom of a deep-sea basin of fumes and hydrothermal silica solutions.

中文翻译：

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乌拉尔志留纪黑烟沉积物

摘要-

考虑了特定的陨石-石英岩（klyuchevites）的地质位置和矿物成分。它们在南乌拉尔 Aramil-Sukhtelinsky 带的深水志留纪-早泥盆世 Bulatovo 碳质-石英序列之间形成单独的互层。在某些地区，这些序列包含玄武岩熔岩单元。Klyuchevites 是一种独特的岩石，因为它们含有大量的陨石和异常广泛的矿物和品种（不少于 50 种），其中许多是乌拉尔的新品种。最初，klyuchevite 是一种硅胶，可能沉积在盆地底部，来自温泉（热水和吸烟者烟雾）和最细的硫化铁（陨石）板、其他硫化物的自生颗粒、复合氧化物（V、Ti、Fe、Cr 、Zn 和 Mn），罕见的含 V 云母偏析（roscoelite 和 segedinite），石英和斜长石碎片，分离的锆石颗粒，独居石-（Ce），磷钇矿-（Y），金红石，锰钛矿，磷灰石等，来自陆源，落入硅胶。随后，在岩化之后，这块岩石经历了强烈的破碎和重新沉积，形成了与石英岩成分和外观相似的互层。Klyuchevite 是深海烟雾和热液二氧化硅溶液盆地底部的黑色吸烟者喷发的物质中的岩化沉积物的一个例子。