Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Celeste G. Engel"'
Publikováno v:
Contributions to Mineralogy and Petrology. 68:373-376
Basalts dredged from the Mid-Indian Ocean Ridge System have rare earth, Rb, and Sr concentrations like those from other mid-ocean ridges, but have slightly higher Sr87/Sr86 ratios. Underlying gabbroic complexes are similar to the basalts in Sr87/Sr86
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df5bcabe7361393da0dbf1774069d491
https://doi.org/10.1007/bf01164522
https://doi.org/10.1007/bf01164522
Publikováno v:
The Journal of Geology. 71:785-789
Concordant $$Ar^{40}-K^{40} + Sr^{87}-Rb^{87}$$ ages of 189 m.y. were obtained on biotite from a Bounty Islands granite. $$Sr^{87}-Rb^{87}$$ ages of 638 m.y. and 681 m.y., respectively, were determined on a microcline and a whole rock sample of grani
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34324e9648771630f3a41c2a2de3730a
https://doi.org/10.1086/626954
https://doi.org/10.1086/626954
Publikováno v:
The Journal of Geology. 72:131-156
The progressive metamorphism of amphibolite interlayers in the Adirondack gneiss complex is reflected in the complete transition between the following mineral assemblages: (1) green hornblende-andesine-quartz-ilmenite, stable at an estimated 525° C.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f76ae415eccd56ecb4da7e2d5c24ba5a
https://doi.org/10.1086/626973
https://doi.org/10.1086/626973
Autor:
Celeste G. Engel, A. E. J. Engel
Publikováno v:
Science. 140:1321-1324
Volcanic rocks dredged from seamounts, fault ridges, and other major geological features of the northeast Pacific Ocean include a wide variety of basalts. Most of these are vesicular, porphyritic types with near analogues in the Hawaiian and other oc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d43bec89032146b9e5d11a63514f919
https://doi.org/10.1126/science.140.3573.1321
https://doi.org/10.1126/science.140.3573.1321
Autor:
Celeste G. Engel, A. A. Chodos
Publikováno v:
Advances in X-ray Analysis. 4:401-413
Fluorescent X-ray spectrographic analyses have been made for the oxides Fe2O3 caO, MgO, K2O, TiO2, and MnO on samples of amphibolite rock. In addition, the above oxides and SiO2 and Al2O3 have been determined in a suite of constituent hornblendes fro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28eb3c8f74cd943d02ff257cae17f5a7
https://doi.org/10.1154/s0376030800001233
https://doi.org/10.1154/s0376030800001233
Publikováno v:
Deep Sea Research and Oceanographic Abstracts. 15:521-534
Oceanic tholeiitic basalts were dredged from 2500 to 3000 m depth on each flank of the Amirante Ridge, 1200 km southeast of Somalia in the western Indian Ocean, by R.V. Argo in 1964. One sample, probably shed from a flow or dike in basement beneath t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e9867e4ac1dcd2dcdcf308c93156ecbb
https://doi.org/10.1016/0011-7471(68)90061-2
https://doi.org/10.1016/0011-7471(68)90061-2
Autor:
Celeste G. Engel, Bartholomew Nagy, Gerhard O. W. Kremp, A. E. J. Engel, Lois Anne Nagy, Charles M. Drew
Publikováno v:
Science. 161:1005-1008
Spheroidal and cupshaped, carbonaceous alga-like bodies, as well as filamentous structures and amorphous carbonaceous matter occur in sedimentary rocks of the Onverwacht Series (Swaziland System) in South Africa. The Onverwacht sediments are older th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4035a6a764b94c442988f53245e4bb5c
https://doi.org/10.1126/science.161.3845.1005
https://doi.org/10.1126/science.161.3845.1005
Autor:
Robert L. Fisher, Celeste G. Engel
Publikováno v:
Science (New York, N.Y.). 166(3909)
The Central Indian Ridge is mantled with flows of low-potassium basalt of uniform composition. Gabbro, anorthosite, and garnet-bearing lherzolite are exposed in cross fractures, and lherzolite is the bedrock at the center of the ridge. The Iherzolite
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a120fd91bcdadb5ac45daa5e8b5a0499
https://pubmed.ncbi.nlm.nih.gov/17775570
https://pubmed.ncbi.nlm.nih.gov/17775570