|Table of Contents|

New Genetic Classification of Kaolin Deposits in China(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2023年第05期
Page:
1110-1117
Research Field:
庆贺汤中立院士从事地质工作七十周年专辑
Publishing date:

Info

Title:
New Genetic Classification of Kaolin Deposits in China
Author(s):
CHENG Hong-fei1;  GAO Yu-long1;  LIANG Shao-xian2*;  LIU Qin-fu3
(1. School of Earth Science and Resources, Chang'an University, Xi'an 710054, Shaanxi, China; 2. College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, Shaanxi, China; 3. School of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, China)
Keywords:
kaolin(rock);  genetic classification;  parent rock type;  diagenesis;  deposit type;  coal-bearing strata kaolinite;  knag soil deposit;  weathered elurial subtype
PACS:
P619.23+2
DOI:
10.19814/j.jese.2023.08038
Abstract:
With the adjustment of China's economic structure and industrial transformation and upgrading, kaolin, included in 15 kinds of minerals, has been suggested to be strategic non-metallic minerals in China. Therefore, it is urgent to study the types and causes of kaolin mineral resources. A new genetic classification scheme of kaolin deposits in China was proposed based on the research results on the genesis of kaolin(rock)deposits and the compound naming principle of parent rock type(or source of ore-forming original material)+ formation + ore type. Kaolin deposits can be divided into 4 genetic types, 8 genetic subtypes and 12 deposit types. On the basis of the existing 6 ore deposit types, 6 new types of ore deposits are proposed, including 3 subtypes of weathered eluvial kaolin ore deposits, which are the weathered eluvial subtype knag soil deposits, rich long sand(rock)weathered eluvial and molding sand quality kaolin ore deposit, and kaolin rocks weathered eluvial subtype aluminum water stone-halloysite-kaolin ore deposit. The origin of hard clay, soft clay and semi-soft clay in refractory clay deposits is attributed to terrigenous clastic and colloidal chemical sedimentary diagenetic subtype kaolin(soil)deposits. For the Carboniferous-Permian coal-bearing rock series in North China, part of coal seam gangue and roof and floor kaolin rocks are formed by descending pyroclastic sedimentary diagenesis. This type of kaolin rocks is unique to China and is classified as descending pyroclastic sedimentary diagenesis subtype. In addition, the variable kaolin subtype deposit is a special type of deposit, and the(thermal)fluid alteration subtype sandstone kaolin deposit is rare, but it is a kaolin deposit with potential economic value.

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Last Update: 2023-10-15