Authigenic Minerals in Phanerozoic Volcanosedimentary Deposits of the Northern Part of the Asian Continent–Pacific Ocean Transition Zone

Pub Date : 2024-08-25 DOI:10.1134/s1819714024700209

A. V. Mozherovsky

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Abstract

Authigenic minerals have been studied in Phanerozoic volcanosedimentary deposits in the northern part of the Asian continent–Pacific Ocean transition zone. The following were found: chlorite, mica, corrensite, rectorite, defective chlorite, kaolinite, smectite, calcite, barite, gypsum, epsomite, zeolites, cristobalite, quartz, and goethite. The minerals corrensite and rectorite have significant indicative properties, as do the assemblages corrensite–laumontite, corrensite–epsomite–authigenic calcite and mica–kaolinite–quartz. Such a range of minerals indicates that the thickness of sediments in the studied basins could reach 3–5 km, and their formation temperature could be more than 150°C. The mica–kaolinite assemblage may indicate epicontinental sedimentation conditions associated with coal formation on nearby land, the corrensite–chlorite assemblage may indicate conditions favorable for the evaporation of seawater, and the presence of laumontite in it may indicate periodic calcium supply to the sedimentary basin. The periods of mineral formation, possibly associated with global climatic events, have been identified: 113–120, 110–113, 105–110, 93–95, 72–83, 61–72, 56–61, 33–56 Ma, which can serve as benchmarks to determine sedimentation conditions and the framework for more reliable stratigraphic constructions.

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亚洲大陆-太平洋过渡带北部新生代火山沉积矿床中的自生矿物

摘要在亚洲大陆-太平洋过渡带北部的新生代火山沉积矿床中研究了一些真性矿物。研究发现了以下矿物：绿泥石、云母、堇青石、rectorite、次生绿泥石、高岭石、镜铁矿、方解石、重晶石、石膏、沸石、沸石、cristobalite、石英和鹅膏石。矿物 corrensite 和 rectorite 以及 corrensite-laumontite、 corrensite-epsomite-authigenic 方解石和云母-高岭石-石英组合具有重要的指示特性。这些矿物表明，所研究盆地的沉积厚度可达 3-5 千米，其形成温度可能超过 150°C。云母-高岭石集合体可能表明了与附近陆地煤炭形成有关的大陆沉积条件，珊瑚绿泥石集合体可能表明了有利于海水蒸发的条件，而其中的白云石可能表明了沉积盆地的周期性钙供应。矿物形成的时期可能与全球气候事件有关：这些时期可作为确定沉积条件的基准，并为更可靠的地层构造提供框架。

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