Fission track dating of authigenic quartz in red weathering crusts of carbonate rocks in Guizhou Province

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doi: 10.1111/j.1755-6724.2004.tb00770.x
Authors:Liu Xiuming; Wang Shijie; Zhang Feng
Author Affiliations:Primary:
Chinese Academy of Sciences, Institute of Geochemistry, Guiyang, China
Volume Title:Acta Geologica Sinica (English Edition)
Source:Acta Geologica Sinica (English Edition), 78(5), p.1136-1142. Publisher: Geological Society of China, Beijing, China. ISSN: 1000-9515
Publication Date:2004
Note:In English. 47 refs.; illus., incl. 1 table, 1 plate
Summary:The Cenozoic evolution history of Guizhou Province, which is located on the southeastern flank of the Qinghai-Tibet Plateau, is unclear because of the lack of sedimentation records. The red weathering crust widespread on the Yunnan-Guizhou Plateau may bear critical information about their evolution history. This work firstly determined the ages of four red weathering crusts in eastern, central and northern Guizhou. The material used in fission track dating is well-crystallized quartz occurring in many in-situ weathering crusts of carbonate rocks. The results showed that the fission track ages of quartz vary over a wide range from 1 to 25 Ma in the four profiles, significantly younger than the ages of the Triassic and Cambrian parent rocks. In combination with the evolution history of the regional geology during the period from 25 to 1 Ma, the ages of quartz can exclude the possibility that the origin of quartz has nothing to do with primary elastic minerals in parent rocks, authigenesis during diagenesis and hydrothermal precipitation or replacement by volcanic activities. It is deduced that the well-crystallized quartz was precipitated from Si-rich weathering fluids during the weathering process of carbonate rocks. The recorded ages of quartz from the four profiles are consistent with the episodes of the planation surfaces on the Qinghai-Tibet Plateau, the forming stages of red soil in the tropics of South China, the tectonically stable periods in Guizhou, and the ages of weathering in other parts of the world during the Cenozoic era. That is to say, the ages of authigenic quartz dated by the fission track method are well feasible and credible. [G.L.B.]
Sections:Age determination; Mineral data
Subsections:Sedimentary rocks
Mineral Groups:Framework silicates
Subjects:Authigenic minerals; Carbonate rocks; Cenozoic; Chemically precipitated rocks; Fission-track dating; Framework silicates; Geochronology; Quartz; Sedimentary rocks; Silica minerals; Silicates; Weathering crust; Asia; China; Far East; Guizhou China
Abstract Numbers:05M/2708
Record ID:2008067064
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute.
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