Results 31 to 40 of about 76,179 (307)

Are spherulitic lacustrine carbonates an expression of large-scale mineral carbonation? : A case study from the East Kirkton Limestone, Scotland [PDF]

, 2018
BP Exploration Co. is thanked for funding, and particularly the Carbonate Team for supporting this research and for fruitful discussions. West Lothian Council and Scottish Natural Heritage are thanked for allowing access and permission for sampling the ...
Billing, Ian, Brasier, Alexander T, Fellows, Simon M., Matthews, Anna, McClymont, Erin L., McGill, Rona A.R., Mercedes-Martín, Ramon, Pedley, Martyn, Prior, Tim J., Reijmer, John J. G., Rogerson, Mike, Vonhof, Hubert   +11 more
core   +1 more source

Significance of the study of sedimental rock-forming evolution in the Earth history for the reconstruction of the changes of geochemical settings on its surface

Известия высших учебных заведений: Геология и разведка, 2019
The distribution in the geological section of two groups of sedimentary rocks, siliceous and carbonate rocks of different composition — has been examined.
V. G. Kuznetsov
doaj   +1 more source

The late Mesozoic-Cenozoic tectonic evolution of the South China Sea: A petrologic perspective [PDF]

, 2014
This paper presents a review of available petrological, geochonological and geochemical data for late Mesozoic to Recent igneous rocks in the South China Sea (SCS) and adjacent regions and a discussion of their petrogeneses and tectonic implications. The
Castillo, PR, Shi, X, Yan, Q
core   +2 more sources

Uranium in alkaline rocks

, 1978
Geologic and geochemical criteria were developed for the occurrence of economic uranium deposits in alkaline igneous rocks. A literature search, a limited chemical analytical program, and visits to three prominent alkaline-rock localities (Ilimaussaq, Greenland; Pocos de Caldas, Brazil; and Powderhorn, Colorado) were made to establish criteria to ...
Murphy, M., Wollenberg, H., Strisower, B., Bowman, H., Flexser, S., Carmichael, I.   +5 more
openaire   +4 more sources

Sulphur isotopes of alkaline magmas unlock long-term records of crustal recycling on Earth

Nature Communications, 2019
Sulphur isotopes track recycling of subducted crustal material, yet few igneous rocks preserve these signals over Earth history. Here, the authors investigate a billion-year-old alkaline province in Greenland and are able to reconstruct a recycled mantle
William Hutchison, Rainer J. Babiel, Adrian A. Finch, Michael A. W. Marks, Gregor Markl, Adrian J. Boyce, Eva E. Stüeken, Henrik Friis, Anouk M. Borst, Nicola J. Horsburgh   +9 more
doaj   +1 more source

Petrology and geochemistry of volcanic and subvolcanic rocks in the south of Asagi igneous complex, northwest of Zahedan, Sistan Suture Zone [PDF]

پترولوژی
IntroductionThe Asagi igneous complex is located in the northwest of Zahedan city (Figure 1A) and is part of a southeast–northwest trending magmatic belt. The igneous rocks of this belt were formed during at least two distinct periods.
Mohammad Bameri, Reyhaneh Abbasi, Abdolreza Partabian   +2 more
doaj   +1 more source

Contemporaneous late cretaceous calc-alkaline and alkaline magmatism in Central Anatolia, Turkey: oxygen isotope constraints on petrogenesis

, 2009
A wide variety of rock types were produced by the latest Cretaceous magmatism in the Central Anatolian Crystalline Complex. These rocks can be divided into three distinct units: (i) calc-alkaline, (ii) subalkaline/transitional, and (iii) alkaline.
Fallick, A., Ilbeyli, N., Meighan, I.G., Pearce, J.A.   +3 more
core   +1 more source

The structure and petrology of the Cnoc nan Cuilean Intrusion, Loch Loyal Syenite Complex, NW Scotland [PDF]

, 2013
In NW Scotland, several alkaline intrusive complexes of Silurian age intrude the Caledonian orogenic front. The most northerly is the Loch Loyal Syenite Complex, which is divided into three separate intrusions (Ben Loyal, Beinn Stumanadh and Cnoc nan ...
Goodenough, Kathryn M., Gunn, A. Gus, Hughes, Hannah S.R., Lacinska, Alicja, McCormac, Michael, Walters, Abigail S.   +5 more
core   +3 more sources

GEOCHRONOLOGY OF ALKALINE ROCKS FROM THE BURPALA MASSIF (NORTHERN PRIBAIKALYE): NEW U-Pb DATA

Геодинамика и тектонофизика
Geochronological studies have been made on the main types of rocks from the Burpala alkaline massif and two gabbro and gabbro-diorite dikes located nearby.
I. А. Izbrodin, А. G. Doroshkevich, А. V. Malyutina, D. V. Semenova, Т. А. Radomskaya, М. N. Kruk, I. R. Prokopyev, А. Е. Starikova, М. О. Rampilov   +8 more
doaj   +1 more source

Facial accessory of high-titanium magnezium-ferruginous micas as one of evaluation criteria of metamorphic and magmatic rocks rare-metall specialization

Литосфера, 2015
Type-chemical features of high-titanium magnezium-ferruginous micas of granulites, mafite-ultramafites, alkaline rocks, and carbonatites are considered.
A. I. Belkovsky
doaj   +2 more sources