Depositional environment of sedimentary rocks inferred from normal fatty acid compositions

Author(s): Murayama, Masaki; Yamamoto, Koshi; Mimura, Koichi
Author Affiliation(s): Primary:
Nagoya University, Department of Earth and Planetary Sciences, Nagoya, Japan
Volume Title: Sedimentary Geology
Source: Sedimentary Geology, 125(1-2), p.61-68. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0037-0738 CODEN: SEGEBX
Note: In English. 22 refs.; illus., incl. 2 tables, sketch map
Summary: Normal saturated fatty acid (n-fatty acid) in marine sediments from coastal and pelagic environments were analyzed. The coastal sediments contain both short-chained n-fatty acids with carbon numbers from 12 to 18 and long-chained acids from 22 to 32, whereas the pelagic sediments contain predominantly short-chained acids. The relative abundance of short-chained to long-chained n-fatty acids, expressed by the molar ratio C16/C26, can be an indicator to assess the depositional environment of sedimentary rocks. The ratio of long-chained n-fatty acids (C22-C32) to the total n-fatty acids also has the potential to discriminate sedimentary environments. The indicators based on the n-fatty acids were applied to the Franciscan bedded cherts. The result shows that the bedded cherts had deposited in continuous environments from the pelagic to the coastal. This is in harmony with the same inference based on major, trace and rare earth elements and normal paraffins.
Year of Publication: 1999
Research Program: DSDP Deep Sea Drilling Project
Key Words: 02 Geochemistry; 06 Petrology, Sedimentary; Asia; California; Chemical composition; Chemically precipitated rocks; Chert; Coastal environment; DSDP Site 305; Deep Sea Drilling Project; Depositional environment; Far East; Fatty acids; Franciscan Complex; Geochemical indicators; Geochemistry; Japan; Leg 32; Major elements; Marine sediments; Mesozoic; Metals; North Pacific; Northwest Pacific; Offshore; Organic acids; Organic compounds; Pacific Ocean; Pelagic environment; Rare earths; San Francisco California; San Francisco County California; Sedimentary rocks; Sediments; Shikoku; Trace elements; United States; West Pacific
Coordinates: N330000 N330000 E1340000 E1340000
N320007 N320008 E1575101 E1575059
N374200 N374800 W1222500 W1223500
Record ID: 1999043471
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands