LAMINATION DURING SILICA DIAGENESIS - EFFECTS OF CLAY CONTENT AND OSTWALD RIPENING

被引：14

作者：

CHANG, JC ^{[1
]}

YORTSOS, YC ^{[1
]}

机构：

[1] UNIV SO CALIF,DEPT CHEM ENGN,PETR ENGN PROGRAM,LOS ANGELES,CA 90089

来源：

AMERICAN JOURNAL OF SCIENCE | 1994年 / 294卷 / 02期

关键词：

D O I：

10.2475/ajs.294.2.137

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

As a result of silica diagenesis, silica-rich formations (the Monterey Formation in California) become highly laminated both with respect to mineralogy (quartz, opal-CT, opal-A, siliceous shale) and to physical properties (hardness, porosity, and permeability). The degree and patterns of lamination vary according to the detrital material content and to the extent of diagenesis. Several qualitative theories to interpret these processes have been proposed in the past. However, quantitative models are presently lacking. In this paper, mathematical models are developed to describe the diagenetic sequence opal-A to opal-CT (and by extension to quartz) via a dissolution-reprecipitation mechanism. The models account for dissolution, nucleation, and precipitation of the various amorphous and crystalline phases. We explore possible self-organization mechanisms that may lead to rock lamination, including clay effects and particle coarsening. Molecular diffusion in the liquid phase is assumed to regulate layering. The models predict diagenetic lamination that can be used to explain field observations.

引用

页码：137 / 172

页数：36

共 42 条

[11]

FEENEY R, 1983, J CHEM PHYS, V78, P1293, DOI 10.1063/1.444867

[12]

FLIKER M, 1974, J CHEM PHYS, V60, P3458

[13]

Hurd D.C., 1983, P187

[14]

HURST HE, 1951, T AM SOC CIV ENG, V116, P770

[15]

Isaacs C.M., 1981, MONTEREY FORMATION R, V15, P257

[16]

ISAACS CM, 1982, GEOLOGY, V10, P304, DOI 10.1130/0091-7613(1982)10<304:IORCOK>2.0.CO

[17]

[18]

ISAACS CM, 1980, THESIS STANFORD U ST

[19]

ISAACS CM, 1983, CENOZOIC MARINE SEDI, P117

[20]

ISAACS CM, 1984, APR SOC PETR ENG CAL

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