DOI: 10.1346/ccmn.1972.0200504. The Chlorite Series of Flagstaff Hill Area, California: A Preliminary Investigation

The Chlorite Series of Flagstaff Hill Area, California: A Preliminary Investigation

10.1346/ccmn.1972.0200504

Crossref journal-article

Cambridge University Press (CUP)

Clays and Clay Minerals (56)

Abstract

AbstractThe results of X-ray diffraction, DTA, i.r. spectroscopy, and chemical tests are presented for some chlorites typical of the Flagstaff Hill area. The area is notable for the large variety of chlorite types occurring in considerable quantities. Chlorite, in this area, is found as veins, as pseudomorphs, and as individual crystals. Textures vary from massive, fine-grained aggregates to books which are more than 20 mm in width. Crystals more than 5 mm in size occur in parallel groupings at rock interfaces. Judging from 45 chlorite samples studied, sheridanite is most abundant; clinochlore and ripidolite are common. Penninite and its Cr-chlorite equivalent are less abundant. The parent rock is an irregularly shaped ultramafic body surrounded by low-grade schists and located very close to a granodiorite stock. The original ultramafic rocks have been highly altered by metamorphism and metosomatism into assemblages comprised mainly of serpentine, talc, hornblende, and chlorite with relics of olivine, pyroxene, and other less abundant original minerals. Much of the exposed rock is essentially monomineralic, mostly consisting of various polytypes of serpentine. Preliminary investigation indicates that the area merits much more study because of the opportunity for readily observing the various chlorite types and determining their genesis, alteration sequences and weathering characteristics. The area, being easily accessible, could also serve as an adequate source for samples to be used as reference standards.

Bibliography

Post, J. L., & Plummer, C. C. (1972). The Chlorite Series of Flagstaff Hill Area, California: A Preliminary Investigation. Clays and Clay Minerals, 20(5), 271â283.

Authors 2

J. L. Post (first)
C. C. Plummer (additional)

References 21 Referenced 36

{'key': 'S0009860400028822_bib2', 'first-page': '510', 'article-title': 'Calculated X-ray Powder Patterns for Silicate Minerals', 'volume': '122', 'author': 'Borg', 'year': '1969', 'journal-title': 'Geol. Soc. Am. Memoir'} / Geol. Soc. Am. Memoir / Calculated X-ray Powder Patterns for Silicate Minerals by Borg (1969)
{'key': 'S0009860400028822_bib20', 'first-page': '233', 'article-title': 'Identification of some 1:1 regular interstratified trioctahedral clay minerals', 'volume': '1', 'author': 'Veniale', 'year': '1969', 'journal-title': 'Proc. Int 1. Clay Conf, Tokyo'} / Proc. Int 1. Clay Conf, Tokyo / Identification of some 1:1 regular interstratified trioctahedral clay minerals by Veniale (1969)
{'key': 'S0009860400028822_bib13', 'first-page': '61', 'article-title': 'Determination of the heavy atom content in chlorite by means of the X-ray diffractometer', 'volume': '49', 'author': 'Petruk', 'year': '1964', 'journal-title': 'Am. Mineralogist'} / Am. Mineralogist / Determination of the heavy atom content in chlorite by means of the X-ray diffractometer by Petruk (1964)
{'key': 'S0009860400028822_bib11', 'first-page': '117', 'article-title': 'Reference chlorite characterization for chlorite identification in soil clays', 'volume': '3', 'author': 'Martin', 'year': '1955', 'journal-title': 'Clays and Clay Minerals'} / Clays and Clay Minerals / Reference chlorite characterization for chlorite identification in soil clays by Martin (1955)
Wells, F. G. , Page, L. R. and James, H. L. , (1940) Chromite deposits of the Pilliken area, El Dorado County, California U.S. Geol. Survey Bull. 922-0 411–460.
{'key': 'S0009860400028822_bib10', 'first-page': '207', 'volume-title': 'The Differential Thermal Investigation of Clays', 'author': 'Mackenzie', 'year': '1966'} / The Differential Thermal Investigation of Clays by Mackenzie (1966)
{'key': 'S0009860400028822_bib4', 'first-page': '128', 'volume-title': 'Geological Investigations of Chromite in California: Bull. 134 Part III —sierra Nevada, Chapt, 4, chromite deposits of El Dorado County, California. State of Calif.', 'author': 'Cater', 'year': '1951'} / Geological Investigations of Chromite in California: Bull. 134 Part III —sierra Nevada, Chapt, 4, chromite deposits of El Dorado County, California. State of Calif. by Cater (1951)
10.1039/tf9615700242
{'key': 'S0009860400028822_bib17', 'first-page': '349', 'article-title': 'Contact metamorphosed ultramafic rocks in the western Sierra Nevada foothills', 'volume': '3', 'author': 'Springer', 'year': '1971', 'journal-title': 'Geol. Soc. Am. Abstracts with Programs'} / Geol. Soc. Am. Abstracts with Programs / Contact metamorphosed ultramafic rocks in the western Sierra Nevada foothills by Springer (1971)
{'key': 'S0009860400028822_bib1', 'first-page': '107', 'article-title': 'Geology of the Sierra Nevada', 'volume': '190', 'author': 'Bateman', 'year': '1966', 'journal-title': 'Editor Geology of Northern California'} / Editor Geology of Northern California / Geology of the Sierra Nevada by Bateman (1966)
{'key': 'S0009860400028822_bib7', 'first-page': '147', 'volume': '290', 'author': 'Grim', 'year': '1968', 'journal-title': 'Clay Mineralogy'} / Clay Mineralogy by Grim (1968)
Murdoch, J. and Webb, R. W. E. , (1966) Minerals of California: State of Calif, Dept. Natural Res., Div. Mines, San Francisco, Bull. 189. 90.
{'key': 'S0009860400028822_bib6', 'first-page': '143', 'article-title': 'The X-ray study of synthetic Mg-Al serpentines and chlorites', 'volume': '44', 'author': 'Gillery', 'year': '1959', 'journal-title': 'Am. Mineralogist'} / Am. Mineralogist / The X-ray study of synthetic Mg-Al serpentines and chlorites by Gillery (1959)
10.3133/pp414A
{'key': 'S0009860400028822_bib8', 'first-page': '277', 'article-title': 'A new review of chlorites', 'volume': '30', 'author': 'Hey', 'year': '1954', 'journal-title': 'Mineral. Mag.'} / Mineral. Mag. / A new review of chlorites by Hey (1954)
10.2465/ganko1941.44.18
{'key': 'S0009860400028822_bib9', 'first-page': '1614', 'article-title': 'Chlorite polytypism — IV. Regular two-layer structures', 'volume': '52', 'author': 'Lister', 'year': '1967', 'journal-title': 'Am. Mineralogist'} / Am. Mineralogist / Chlorite polytypism — IV. Regular two-layer structures by Lister (1967)
{'key': 'S0009860400028822_bib3', 'first-page': '242', 'volume-title': 'The X-Ray Identification and Crystal Structures of Clay Minerals', 'author': 'Brown', 'year': '1961'} / The X-Ray Identification and Crystal Structures of Clay Minerals by Brown (1961)
10.1021/ac60147a014
{'key': 'S0009860400028822_bib14', 'first-page': '170', 'volume-title': 'Soil Clay Mineralogy', 'author': 'Rich', 'year': '1964'} / Soil Clay Mineralogy by Rich (1964)
{'key': 'S0009860400028822_bib18', 'first-page': '32', 'article-title': 'Isomorphous substitution and i.r. spectra of the layer lattice silicates', 'volume': '46', 'author': 'Stubican', 'year': '1961', 'journal-title': 'Am. Mineralogist'} / Am. Mineralogist / Isomorphous substitution and i.r. spectra of the layer lattice silicates by Stubican (1961)

Dates

Type	When
Created	18 years, 11 months ago (Sept. 12, 2006, 6:22 a.m.)
Deposited	1 year, 2 months ago (July 3, 2024, 2:11 a.m.)
Indexed	1 month, 4 weeks ago (July 7, 2025, 7:45 a.m.)
Issued	52 years, 11 months ago (Oct. 1, 1972)
Published	52 years, 11 months ago (Oct. 1, 1972)
Published Online	1 year, 2 months ago (July 1, 2024)
Published Print	52 years, 11 months ago (Oct. 1, 1972)

Funders 0

None

BibTeX

@article{Post_1972, title={The Chlorite Series of Flagstaff Hill Area, California: A Preliminary Investigation}, volume={20}, ISSN={1552-8367}, url={http://dx.doi.org/10.1346/ccmn.1972.0200504}, DOI={10.1346/ccmn.1972.0200504}, number={5}, journal={Clays and Clay Minerals}, publisher={Cambridge University Press (CUP)}, author={Post, J. L. and Plummer, C. C.}, year={1972}, month=oct, pages={271–283} }

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