The geochemistry of young volcanism throughout western Panama and southeastern Costa Rica: an overview
MJ Defant, TE Jackson, MS Drummond… - Journal of the …, 1992 - lyellcollection.org
Oblique aseismic subduction below western Panama and southeastern Costa Rica has
produced Recent arc-related volcanism. The aseismicity is probably related to the …
produced Recent arc-related volcanism. The aseismicity is probably related to the …
Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes
SS Sun, WF McDonough - Geological Society, London, Special …, 1989 - lyellcollection.org
Trace-element data for mid-ocean ridge basalts (MORBs) and ocean island basalts (OIB)
are used to formulate chemical systematics for oceanic basalts. The data suggest that the …
are used to formulate chemical systematics for oceanic basalts. The data suggest that the …
Chemical geodynamics in the back-arc region of Japan based on the trace element and Sr Nd isotopic compositions
Abstract 143 Nd 144 Nd, 87 Sr 86 Sr, trace and major element results are reported for
Cenozoic alkaline basalts and associated tholeiitic basalts from southwestern Japan, and …
Cenozoic alkaline basalts and associated tholeiitic basalts from southwestern Japan, and …
Nb Ta-rich mantle amphiboles and micas: Implications for subduction-related metasomatic trace element fractionations
DA Ionov, AW Hofmann - Earth and Planetary Science Letters, 1995 - Elsevier
We report the trace element compositions of amphibole and mica separated from mantle
xenoliths in alkali basalts and analyzed by ICP-MS. Nb and Ta are highly (50–200-fold) …
xenoliths in alkali basalts and analyzed by ICP-MS. Nb and Ta are highly (50–200-fold) …
The Himalayan Yulong porphyry copper belt: Product of large-scale strike-slip faulting in eastern Tibet
H Zengqian, M Hongwen, K Zaw… - Economic …, 2003 - pubs.geoscienceworld.org
The Yulong porphyry copper belt is the most significant porphyry copper belt in Tibet and is
located in the Qiangtang terrane of the Himalayan-Tibetan orogen. The terrane is a collage …
located in the Qiangtang terrane of the Himalayan-Tibetan orogen. The terrane is a collage …
Slab-mantle interactions: 3. Petrogenesis of intraplate magmas and structure of the upper mantle
AE Ringwood - Chemical Geology, 1990 - Elsevier
Intraplate magmas worldwide display a set of geochemical and isotopic characteristics
which seem to have been produced by a common petrogenetic process connected with the …
which seem to have been produced by a common petrogenetic process connected with the …
Mechanisms and sources of mantle metasomatism: major and trace element compositions of peridotite xenoliths from Spitsbergen in the context of numerical …
Mineral and whole-rock chemical data for peridotite xenoliths in basaltic lavas on
Spitsbergen are examined to reassess mechanisms of melt–fluid interaction with peridotites …
Spitsbergen are examined to reassess mechanisms of melt–fluid interaction with peridotites …
Origin of the slab component in arc lavas from across-arc variation of B and Pb isotopes
T Ishikawa, E Nakamura - Nature, 1994 - nature.com
AT convergent margins, the subducting oceanic slab is thought to dehydrate, producing
fluids which metasomatize the overlying mantle wedge where island-arc magma forms …
fluids which metasomatize the overlying mantle wedge where island-arc magma forms …
Coexisting calcalkaline and high‐niobium basalts from Turrialba Volcano, Costa Rica: Implications for residual titanates in arc magma sources
Turrialba volcano, the southeasternmost volcano in the Central American arc, is constructed
of medium to high‐K calcalkaline basalts, andesites, and dacites, plus rare basalts with …
of medium to high‐K calcalkaline basalts, andesites, and dacites, plus rare basalts with …
The origins of ultrapotassic rocks as inferred from Sr, Nd and Pb isotopes
DR Nelson, MT McCulloch, SS Sun - Geochimica et Cosmochimica Acta, 1986 - Elsevier
Abstract Pb, Nd and Sr isotopic compositions are reported for ultrapotassic rocks from a
variety of tectonic settings. Olivine leucitites located within the Palaeozoic Lachlan Fold Belt …
variety of tectonic settings. Olivine leucitites located within the Palaeozoic Lachlan Fold Belt …