Results 91 to 100 of about 2,894 (184)

Controlling Parameters of Acoustic Velocity in Organic-Rich Mudstones (Vaca Muerta Formation, Argentina)

open access: yesMinerals
We conducted ultrasonic (1-MHz) laboratory measurements on 210 samples from the Vaca Muerta Formation (Neuquén Basin, Argentina) to determine the factors influencing acoustic velocities in siliciclastic–carbonate mudstone. We quantitatively assessed the calcium carbonate and total organic carbon (TOC) content and qualitatively identified the quartz and
Mustafa Kamil Yuksek   +3 more
openaire   +1 more source

Recent advances in Nb-Zr chronometry and early Martian silicate differentiation [PDF]

open access: yes, 2017
第8回極域科学シンポジウム/個別セッション:[OA] 南極隕石12月7日(木)国語研究所 2階講堂The Eighth Symposium on Polar Science/Ordinary sessions: [OA] Antarctic meteoritesThu.

core   +1 more source

Ibitira: A basaltic achondrite from a distinct parent asteroid [PDF]

open access: yes
I have done detailed petrologic study of Ibitira, nominally classified as a basaltic eucrite. The Fe/Mn ratio of Ibitira pyroxenes with
Mittlefehldt, David W.
core   +1 more source

Ammonoids of the basal section of the Vaca Muerta Formation, Neuquén Basin, Argentina

open access: yes, 2014
Marine successions of the Vaca Muerta Formation (early Tithonian-late Berriasian) in the Neuquén Basin, west-central Argentina, are worldwide known by their abundant and well preserved  ammonoid content. A systematic revision of the ammonoid groups contained in the first portion (late early Tithonian - early middle Tithonian) of the Vaca Muerta ...
Vennari, Verónica Vanesa   +1 more
openaire   +1 more source

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