Results 131 to 140 of about 322 (183)

Regularized ensemble Kalman inversion for robust and efficient gravity data modeling to identify mineral and ore deposits. [PDF]

Sci Rep
Laby DA, Sungkono S, Biswas A.
europepmc   +1 more source

Some of the next articles are maybe not open access.

Related searches:

Geochemistry and petrogenesis of the Neoarchean Sandur metavolcanic rocks

2020
The Sandur greenstone belt (SGB) is a distinctive greenstone belt as it is perched within the Closepet granitoid rocks (CG).
Subarna Baidya, Anshuman Giri, Anand Rajagopal   +2 more
openaire   +1 more source

Pontiac metavolcanic rocks within the Cadillac tectonic zone, McWatters, Abitibi Belt, Quebec

Canadian Journal of Earth Sciences, 1993
The McWatters metavolcanic rocks are structurally bounded lenses within the Cadillac tectonic zone on the southern boundary of the Abitibi greenstone belt. They comprise komatiite, tholeiitic basalt and gabbro, and calc-alkaline andesitic lavas and volcaniclastic rocks cut by calc-alkaline dioritic and lamprophyric dykes. The McWatters basalts are mid-
David Morin, Michel Jébrak, Marc Bardoux, Normand Goulet   +3 more
openaire   +1 more source

Sm-Nd Isotopic Data from Archean Metavolcanic Rocks at Holenarsipur, South India

The Journal of Geology, 1987
Results of a Sm-Nd isotopic analysis of Archean metavolcanics in the Holenarsipur greenstone belt, Karnataka, South India, give a whole-rock isochron age of 2.62 Ga for lightly deformed metabasaltic amphibolites in the northern part of the belt. This is within error of the age of high-grade metamorphism and crustal thickening which affected areas ...
S. A. Drury, P. C. Van Calsteren, G. J. Reeves-Smith   +2 more
openaire   +1 more source

Antiperthites in a metavolcanic rock

Geologiska Föreningen i Stockholm Förhandlingar, 1973
Abstract Antiperthites from the wall rock of the Kiirunavaara iron ore are discussed in the light of their chemical composition. According to the microprobe analysis, the content of Na in microcline and K in albite is low (Ab2 and Or0.3 approximately).
openaire   +1 more source

Composition and origin of metamorphosed ferromanganese rocks in metavolcanics of Eastern Kamchatka

Russian Journal of Pacific Geology, 2009
This paper presents detailed mineralogical and geochemical data on the metamorphosed ferromanganese rocks observed as rare lenticular bodies among the metavolcanics of the Khavyven Highland and Ganal Ridge in Eastern Kamchatka. They are specific porphyry-type banded Mn-garnet and amphibole rocks with large (up to 1–5 mm) magnetite porphyroblasts.
I. A. Tararin, Z. G. Badredinov, Ye. A. Nozdrachev, O. I. Sharova   +3 more
openaire   +1 more source

Steep tilting of metavolcanic rocks by multiple mechanisms, central Sierra Nevada, California

Geological Society of America Bulletin, 2000
For ∼200 km along the eastern Sierra Nevada continental magmatic arc, Mesozoic metavolcanogenic rocks dip steeply to the southwest (∼80°), a feature that must reflect fundamental processes in magmatic-arc construction. Although tight folds can account for such steep bedding tilts, folds in the metavolcanogenic sections are sparse and small scale.
Tobisch, Othmar T., Fiske, Richard S., Saleeby, Jason B., Holt, Elizabeth, Sorensen, Sorena S.   +4 more
openaire   +1 more source

Metavolcanic rocks and their origin, Southern Adirondack mountains, New York

Bulletin Volcanologique, 1970
One of the problems associated with massif-type anorthosite in high grade metamorphic terranes is the absence of anorthositic extrusives. However, if anorthosite formed by crystal segregation, volcanic equivalents of the final fluid differentiate might occur.
openaire   +1 more source

Geochemistry and tectonic significance of the Ongarbira metavolcanic rocks, Singhbhum District, India

Precambrian Research, 1994
Abstract The volcanic-sedimentary sequence of Ongarbira occurs to the south of the Singhbhum Shear Zone and rests uncomformably on a basement topographic-low between the Chakradharpur Granite and the Singhbhum Granite. Structural analysis reveals that the Ongarbira synform and other adjoining structures are kilometre-scale first-generation folds on E-
W.H. Blackburn, D.C. Srivastava
openaire   +1 more source

Geochemistry of Archean Metavolcanic Rocks from Kadiri Schist Belt, Andhra Pradesh, India

Gondwana Research, 2000
Abstract The basic volcanic group exposed in the Kadiri schist belt includes high Mg-basalt, basalt, basaltic andestite and dacite. The basalts are tholeiitic in composition and high Mg-basalts, basaltic andesites and dacites show calc-alkaline affinity.
K. Satyanarayana, J. Siddilingam, Jagannath Jetty   +2 more
openaire   +1 more source