Results 61 to 70 of about 60,881 (232)

Using Petrogeochemical Modeling to Understand the Relationship between Paleozoic Magmatism in the Kola Region and Its Precambrian History

Geosciences, 2019
The Kola region hosts numerous Paleozoic massifs of ultrabasic alkaline rocks and carbonatites with deposits of commercially valuable metals, such as iron, tantalum, niobium, and rare earth elements.
Nikolay E. Kozlov, Nikolay O. Sorokhtin, Eugeny V. Martynov   +2 more
doaj   +1 more source

Restoring soil and tree nutrition through non‐industrial wood ash additions to sugarbushes

Restoration Ecology, EarlyView.
Nutrient losses from forest soils caused by decades of acid deposition have affected tree growth and depleted soils of essential nutrients in eastern North America. Non‐industrial wood ash (NIWA) is rich in macronutrients and may be a potential remediation strategy to restore lost nutrients as a forest soil amendment.
Shelby M. Conquer, Batool S. Syeda, Norman D. Yan, Shaun A. Watmough   +3 more
wiley   +1 more source

A hitherto unknown river type from the Archaean at Bhurkuli (Jharkhand, E India)

Geologos, 2017
The Archaean granitoid pluton of the Singhbhum craton in E India is overlain by Archaean to Palaeoproterozoic metasediments. These sediments are still poorly known and their stratigraphy is under debate.
Loon A.J. (Tom) van, De Shuvabrata
doaj   +1 more source

Microbial mats in dinosaur ichnocoenoses

Sedimentology, EarlyView.
ABSTRACT Until now, the significance of microbial mats in preservation of dinosaur tracks and in reconstructing the palaeoenvironment in which dinosaurs roamed was rarely studied. Dinosaur tracks are commonly found close to ancient aquatic bodies where moist sediment had once allowed footstep registration.
Nora Noffke, Paul C. Murphey, Roger C. Buntin, Martin G. Lockley   +3 more
wiley   +1 more source

The carbon release triggered by 1.32 Ga sill emplacement and its potential environmental implications

Frontiers in Earth Science
Magmatic activity is one of the important pathways for the delivery of deep Earth carbon to the surface. The massive carbon release in this process can have significant impacts on atmospheric-oceanic environment.
Chaokun Zhang, Chaokun Zhang, Wei Tian, Wei Tian, Yanxin He, Yanxin He, Mingyue Gong, Shun Li   +7 more
doaj   +1 more source

NEW CHRONOSTRATIC SCHEME OF SOUTH-EASTERN FENNOSCANDIA AND ITS USE IN THE PREPARATION OF SMALL-SCALE GEOLOGICAL MAPS OF THE PRECAMBRIAN REGIONS

Известия высших учебных заведений: Геология и разведка, 2017
A new chronostratic scheme of South-East (SE) Fennoscandia has been developed, based on the International Stratigraphie Scale, taking into account some elements of the Common Stratigraphic Scale of Russia and the regional stratigraphic scheme of the ...
V. S. Kulikov, V. V. Kulikova, A. K. Polin   +2 more
doaj   +1 more source

Microbial mats and thalassinid shrimp: Spatial and geochemical interactions in a modern intertidal environment

Sedimentology, EarlyView.
ABSTRACT This research examines the spatial and geochemical interactions between mat‐forming microorganisms and thalassinid shrimp in an intertidal flat situated on the shores of Willapa Bay, Washington, USA. The study serves as a contemporary analog for the relationships between mats and burrowing organisms in deep time.
Brette S. Harris, Sara K. Biddle, Maya T. LaGrange, Scott Melnyk, Cody N. Lazowski, Jenifer S. Spence, Daniel Alessi, Jeffrey Kavanaugh, Kurt O. Konhauser, Murray K. Gingras   +9 more
wiley   +1 more source

Structural geology of the African rift system: Summary of new data from ERTS-1 imagery [PDF]

ERTS imagery reveals for the first time the structural pattern of the African rift system as a whole. The strong influence of Precambrian structures on this pattern is clearly evident, especially along zones of cataclastic deformation, but the rift ...
Mohr, P. A.
core   +1 more source

⁸⁷Sr/⁸⁶Sr chemostratigraphy of Neoproterozoic Dalradian limestones of Scotland and Ireland: constraints on depositional ages and time scales [PDF]

, 2004
New calcite ⁸⁷Sr/⁸⁶Sr data for 47 limestones from the metamorphosed and deformed Neoproterozoic-Cambrian Dalradian Supergroup of Scotland and Ireland are used to identify secular trends in seawater <sup>
Ellam, R.M., Fallick, A.E., Graham, C.M., Thomas, C.W.   +3 more
core   +1 more source

CHARACTERISTICS OF THE UNIQUE Y-HREE-F-RICH PEGMATITE SYSTEM REVEALED BY ZIRCON GEOCHEMISTRY: A CASE STUDY FROM MT. PLOSKAYA AMAZONITE DEPOSIT, KOLA PENINSULA [PDF]

Минералогия
An amazonite-quartz-albite pegmatite body of the Mt. Ploskaya intrudes a metavolcanic complex of the Keivy Terrane (Kola Peninsula) and is unique in its diversity and an assemblage of ore and accessory Y-Yb-Ta-Nb-Be-Pb-F mineralization.
D.R. Zozulya, S.G. Skublov, E.V. Levashova, L.M. Lyalina   +3 more
doaj   +1 more source