نتایج جستجو برای: litho geochemical anomaly
تعداد نتایج: 51132 فیلتر نتایج به سال:
Overlay control is becoming increasingly more important with the scaling of technology. It has become even more critical and more challenging with the move toward multiple-patterning lithography, where overlay translates into CD variability. Design rules and overlay have strong interaction and can have a considerable impact on the design area, yield, and performance. We study this interaction a...
Microbial communities and their associated metabolic activity in marine sediments have a profound impact on global biogeochemical cycles. Their composition and structure are attributed to geochemical and physical factors, but finding direct correlations has remained a challenge. Here we show a significant statistical relationship between variation in geochemical composition and prokaryotic comm...
The Ediacaran Gametrail Formation of northwestern Canada chronicles the evolution a complex carbonate ramp system in response to fluctuations relative sea level and regional tectonic subsidence alongside exceptional global change associated with Shuram carbon isotope excursion (CIE). Here, we use extensive outcrop exposures Wernecke Mountains Yukon, Canada, construct shelf-slope transect across...
The about 2055-Ma-old mafic to ultramafic Uitkomst Complex in the Mpumalanga Province of South Africa hosts low-grade-large-tonnage Ni-Cu-PGE deposit, Nkomati. complex is regarded represent a satellite Bushveld and feeder an eroded magmatic reservoir southeast. Aeromagnetic surveys previous drilling indicated overall northwestern-downdip extension complex, but question what extent which express...
Research subject. The research objects included a book section on the Vendian stratigraphy of Yazvinsko-Kosva sub-zone Kvarkush-Kamenogorsk meganticlinorium, written for Explanatory note to sheet O-40 – Perm State Geological Map 1000/3 Russian Federation, as well results obtained in course various thematic (stratigraphic, paleontological, litho- and isotope-geochemical, etc.) studies sedimentar...
in this research work, the frequency domain (fd) of surface geochemical data was analyzed to decompose the complex geochemical patterns related to different depths of the mineral deposit. in order to predict the variation in mineralization in the depth and identify the deep geochemical anomalies and blind mineralization using the surface geochemical data for the dalli cu-au porphyry deposit, a ...
The LA-ICP-MS U-Pb method has been used to define the Palaeoarchaean (3264 ± 7 Ma) age of zircon from metarhyodacite Aleksandrovsk Suite Mykhailivka Series (the southeastern part Tim-Yastrebov structure Kursk Magnetic Anomaly (KMA)). According geochemical data, primary melt probably developed in a crustal magmatic source due melting older felsic rocks. closely resemble composition felsic, igneo...
The geochemical signatures like discordant variation of major and trace elements among felsic-intermediate and basic rocks and mafic enclaves of Malayer region on binary variation plots, decreasing values of FeOt, TiO2, MgO, MnO and CaO accompanied with increasing of SiO2 content from basic to felsic rocks, and decreasing Ni, Cr and Co with increasing SiO2 are considered as indications of mag...
Neogene high silica adakitic domes of south Quchan, cropped out in the northern part of the Quchan-Esfarayen Cenozoic magmatic arc (north of Sabzevar ophiolitic and metamorphic belt). In this volcanic belt, magmatic activities has been started since Eocene (about 40 Ma ago) and continued to Plio-Pleistocene (about 2 Ma ago). The ages of volcanic rocks range from Eocene to Plio-Pleistocene from ...
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