Results 71 to 80 of about 5,077 (206)

Incorporation of ¹⁶O-rich anhydrous silicates in the protolith of highly hydrated asteroid Ryugu

, 2022
The abundant phyllosilicate and carbonate minerals characterizing most of the returned particles from asteroid Ryugu suggest a history of extensive aqueous alteration on its parent body, similar to the rare mineralogically altered, but chemically ...
Nakazawa, Satoru, Saiki, Takanao, Matsuda, Nozomi, Kodama, Yu, Miyazaki, Akiko, Nishimura, Masahiro, Yamaguchi, Akira, Imae, Naoya, Ohigashi, Takuji, Okada, Ikuo, Tsuda, Yuichi, Tomioka, Naotaka, Liu, Ming-Chang, Tanaka, Satoshi, Hirahara, Kaori, Uesugi, Masayuki, Yada, Toru, Yogata, Kasumi, Greenwood, Richard C., Okada, Tatsuaki, Terui, Fuyuto, Watanabe, Sei-ichiro, Ito, Motoo, Usui, Tomohiro, Kimura, Makoto, Sakurai, Ikuya, Uesugi, Kentaro, Abe, Masanao, McCain, Kaitlyn A., Shirai, Naoki, Karouji, Yuzuru, Yuzawa, Hayato, Yoshikawa, Makoto, Nakato, Aiko   +33 more
core   +1 more source

Carbonation of diverse ultramafic rocks: implications for Ca-rich protolith from the Setogawa Group, Central Japan

Ophicarbonate/listvenite and ultramafic rocks are distributed in various tectonic blocks in the western Izu Peninsula. These ultramafic rocks are likely of upper mantle origin, influenced by magmatic activity associated with the formation of the Izu ...
Tomoyuki Mizukami, Ryosuke Oyanagi, Asuka Yamaguchi, Tatsuya Hattori, Yumiko Harigane, Tomoaki Morishita, Mayuko Fukuyama   +6 more
core   +1 more source

Geochemistry and Protolith Determination of the Hypersthene-Quartz-Oligoclase Gneiss from the Hudson Highlands, New York [PDF]

, 2014
The hypersthene-quartz-oligoclase gneiss of the Hudson Highlands, NY mapped by Dodd (1965) has been of unknown origin due to complex field relations resulting from metamorphism and deformation during the Ottawan Orogeny, and a lack of geochemical data ...
Miller, Kathleen
core  

(Table 2) Mineralogy of DSDP and ODP serpentinites and classification of their protoliths

, 2012
(Table 2) Mineralogy of DSDP and ODP serpentinites and classification of their ...
Kodolányi, János, Balz S Kamber (6959768), Carl Spandler (6959762), Pettke, Thomas, Gméling, Katalin, Spandler, Carl, Katalin Gméling (6959777), Kamber, Balz S, Thomas Pettke (6959756), János Kodolányi (6959753)   +9 more
core   +1 more source

Geochemical constraints on the multistage metamorphic evolution of mafic granulites from the South Delhi Terrane, Northwestern India

Discover Geoscience
Mafic granulites from the Balaram area, South Delhi Terrane, Aravalli–Delhi Mobile Belt (ADMB), provide important insights into the petrogenesis and tectonometamorphic evolution of the lower continental crust. These rocks are characterized by the mineral
Manish Kumar, Divya Prakash, Vagesh Nath Yadav, Rana Firdous, Sonal Shukla, Manoj Kumar Yadav   +5 more
doaj   +1 more source

Dating the Sedimentary Protolith of the Daldyn Group Quartzite, Anabar Shield, Russia: New Detrital Zircon Constraints

, 2020
Quartzites and paragneisses of the Archean granulite series of the Anabar Shield (Siberian Craton, Russia) are described geochemically. The Sm-Nd isotope systematics of the rocks and the U-Pb age (SHRIMP II) and geochemistry of zircons from quartzites ...
Sergey G. Skublov, Lyudmila Yu. Sergeeva, Nikolay I. Gusev   +2 more
core   +1 more source

RI-45 Iron-Formation Protolith and Genesis, Cuyuna Range, Minnesota

, 1995
The Cuyuna iron range in east-central Minnesota is unique in the Lake Superior region because of its large manganiferous iron ore resource. The protolith to the ore has traditionally been considered a Lake Superior-type iron-formation similar to other ...
Morey, G.B., Cleland, Jane M., McSwiggen, Peter L.   +2 more
core  

The origin of oceanic crust and metabasic rocks protolith, the Luk Ulo Mélange Complex, Indonesia

, 2018
The Luk Ulo Mélange Complex (LUMC) is composed of tectonic slices of rocks that surrounded by scaly clay matrix. These rocks consist of serpentinite, gabbro, diabase, and basalt, eclogite, blueschist, amphibolite, schist, gneiss, phylite and slate ...
H Permana, A U Nurhidayati, S Aribowo, null Munasri, Maruf M Mukti   +4 more
core   +1 more source

High-alumina gneisses of the Chupa Formation in the Belomorian Mobile Belt: metamorphic conditions, partial melting, and the age of migmatites

Записки Горного института
Migmatized gneisses of the Chupa paragneiss Formation in the Belomorian Mobile Belt (BMB) of the Fennoscandian Shield have been studied, and the conditions of partial melting during high-grade metamorphism of the rocks were determined.
Anastasiya V. Yurchenko, Shauket K. Baltybaev, Tatyana A. Myskova   +2 more
doaj  

Major Element Composition of Sediments in Terms of Weathering and Provenance: Implications for Crustal Recycling

Geochemistry, Geophysics, Geosystems, 2020
The elemental composition of a sediment is set by the composition of its protolith and modified by weathering, sorting, and diagenesis. An important problem is deconvolving these contributions to a sediment's composition to arrive at information about ...
Alex G. Lipp, Oliver Shorttle, Frank Syvret, Gareth G. Roberts   +3 more
doaj   +1 more source