High-frequency isotopic variations in the Mauna Kea tholeiitic basalt sequence: Melt zone dispersivity and chromatography
- Author:
-
DePaolo, Donald J.
- Title:
- High-frequency isotopic variations in the Mauna Kea tholeiitic basalt sequence: Melt zone dispersivity and chromatography
- Periodical:
- Journal of Geophysical Research
- Year:
- 1996
- Volume:
- 101
- Pages:
- 11,855-11,864
- Subject:
-
Hawaii Scientific Drilling Project
Lava analysis
- Summary:
- One of two objectives of the Hawaii Scientific Drilling Project, (HSDP), is to systematically sample and characterize the lava output of Mauna Kea, a Hawaiian volcano, in terms of isotopic ratios of Sr, Nd, Pb, He, and Os. This stratigraphically-controlled sequence of data can help to better understand the origin of plume material in the mantle. However, another objective is to assess certain aspects of the partial melting process itself. As a result, this paper focuses on the small-amplitude, high-frequency variations of isotopic ratios through the Mauna Kea tholeiitic lava sequence on the island of Hawaii. It also presents an analysis in terms of the "hydrological" properties of the melt zone. The analysis requires systematic sampling coupled with a reasonably good knowledge of the time scale of lava accumulation.
- Label:
- Geology
- Collection:
- Periodicals