Sulfur isotopic ratios of the magnetite-series and ilmenite-series granitoids of the Sierra Nevada batholith--A reconnaissance study

Journal Article · Fri Sep 01 00:00:00 EDT 1989 · Geology; (USA)

DOI:https://doi.org/10.1130/0091-7613(1989)017<0788:SIROTM>2.3.CO;2· OSTI ID:6918529

Ishihara, Shunoso ^[1]; Sasaki, Akira ^[2]

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1. Government Industrial Research Institute, Sendai (Japan)
2. Ibaraki Univ., Mito (Japan)

Whole-rock sulfur isotopic ratios were determined for four magnetite-series and two ilmenite-series granitoids from the central Sierra Nevada batholith. The magnetite-series rocks yielded {delta}{sup 34}S{sub (CDT)} of 1.6 to 4.0, and the ilmenite-series rocks revealed lower values of {minus}3.7 and {minus}5.3. These correlations are the same as those observed in the Japanese Islands arc. A majority of the Sierra Nevada granitoids are considered to have positive {sup 34}S values as a result of island-arc magmatism. The same magma was reduced by the introduction of organic carbon from the sedimentary wall rocks along the western zone where the depth of granitoid emplacement was as deep as 4-5 kbar, thus forming the ilmenite-series granitoids.

• OSTI ID: 6918529
• Journal Information: Geology; (USA), Vol. 17:9; ISSN 0091-7613
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
GEOLOGIC DEPOSITS
GEOCHEMISTRY
ILMENITE
ISOTOPE RATIO
MAGNETITE
SIERRA NEVADA COLORADO
CARBON
COMPARATIVE EVALUATIONS
CORRELATIONS
GEOLOGIC HISTORY
JAPAN
MAGMA
MAGMATISM
MAGNETIC SUSCEPTIBILITY
ORGANIC MATTER
PLUTONIC ROCKS
RESERVOIR PRESSURE
SEDIMENTARY ROCKS
SULFUR 32
SULFUR 34
ASIA
CHALCOGENIDES
CHEMISTRY
ELEMENTS
EVEN-EVEN NUCLEI
IGNEOUS ROCKS
IRON COMPOUNDS
IRON ORES
IRON OXIDES
ISOTOPES
LIGHT NUCLEI
MAGNETIC PROPERTIES
MINERALS
MOUNTAINS
NONMETALS
NUCLEI
ORES
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
ROCKS
STABLE ISOTOPES
SULFUR ISOTOPES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
580000* - Geosciences