| Abstract: | Three mechanisms for clay mineral formation (inheritance, neoformation, and transformation) operating in three geological environments (weathering, sedimentary, and diagenetic-hydrothermal) yield nine possibilities for the origin of clay minerals in nature. Several of these possibilities are discussed in terms of the rock cycle. The mineralogy of clays neoformed in the weathering environment is a function of solution chemistry, with the most dilute solutions favoring formation of the least soluble clays. After erosion and transportation, these clays may be deposited on the ocean floor in a lateral sequence that depends on floccule size. Clays undergo little reaction in the ocean, except for ion exchange and the neoformation of smectite; therefore, most clays found on the ocean floor are inherited from adjacent continents. Upon burial and heating, however, dioctahedral smectite reacts in the diagenetic environment to yield mixed-layer illite-smectite, and finally illite. With uplift and weathering, the cycle begins again. Refs. |
| Genre: | Article |
| ProdID: | 70011246 |
| Citation Author: | Eberl, D. D. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 257 |
| Citation Issue: | 1517 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 17 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | Royal Society of London |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Clay mineral formation and transformation in rocks and soils; 1983; Article; Journal; Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences; Eberl, D. D. |
| Citation Start Page: | 241 |
| Citation Volume: | 311 |
| Citation Year: | 1983 |
| Type: | citation/reference |
| Text: | Clay mineral formation and transformation in rocks and soils; 1983; Article; Journal; Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences; Eberl, D. D. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1098/rsta.1984.0026 |
| Date Other: | Sat, 1 Jan 1983 00:00 -0600 |
| Publisher: | Royal Society of London |
