نتایج جستجو برای: mudstone gy1c

تعداد نتایج: 780  

Journal: :Processes 2023

Mudstone is a widely occurring type of rock in deep mining, and it crucial to understand its failure mechanisms strength characteristics under the interaction water high stress ensure stability deeply buried engineered mudstone. In this study, composition structure mudstone were obtained, triaxial tests conducted on five different contents four confining pressures using servo press. The variati...

2014
D. T. Vaniman

, (2014); 343 Science et al. D. T. Vaniman Mineralogy of a Mudstone at Yellowknife Bay, Gale Crater, Mars This copy is for your personal, non-commercial use only. clicking here. colleagues, clients, or customers by , you can order high-quality copies for your If you wish to distribute this article to others here. following the guidelines can be obtained by Permission to republish or repurpose ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2015
Jennifer C Stern Brad Sutter Caroline Freissinet Rafael Navarro-González Christopher P McKay P Douglas Archer Arnaud Buch Anna E Brunner Patrice Coll Jennifer L Eigenbrode Alberto G Fairen Heather B Franz Daniel P Glavin Srishti Kashyap Amy C McAdam Douglas W Ming Andrew Steele Cyril Szopa James J Wray F Javier Martín-Torres Maria-Paz Zorzano Pamela G Conrad Paul R Mahaffy

The Sample Analysis at Mars (SAM) investigation on the Mars Science Laboratory (MSL) Curiosity rover has detected oxidized nitrogen-bearing compounds during pyrolysis of scooped aeolian sediments and drilled sedimentary deposits within Gale crater. Total N concentrations ranged from 20 to 250 nmol N per sample. After subtraction of known N sources in SAM, our results support the equivalent of 1...

2004
DAIDU FAN CONGXIAN LI PING WANG

Tonglu rhythmites (Upper Ordovician) in Zhejiang Province, east-central China, display three orders of cyclicity in sandstone and mudstone layer thickness. Millimeter-thick alternations of sandstone and mudstone laminae are ascribed to single tidal cycles. Centimeter-thick alternations of sand-dominated layers (SDLs) and muddominated layers (MDLs) are interpreted to be related to alternation of...

Journal: :Proceedings of the Geologists' Association 2021

The Lough Foyle Basin is a half-graben that straddles the border between Northern Ireland and Republic of contains sediments range in age from Lower Carboniferous to Holocene. basin’s post-rift succession represented by Penarth Group Lias Group. lithostratigraphy biostratigraphy interval are revised using new borehole material existing outcrop. Palaeontological data provide chronostratigraphic ...

Journal: :Frontiers in Earth Science 2023

Mudstone is the most common cap rock in petroliferous basins. The mechanical properties of mudstone different areas and buried depths are obviously different, which directly affects brittleness ductileness caprock its deformation characteristic. This research carried out X ray diffraction (XRD) mineral composition analysis, microscopic observation structural characteristics mechanics triaxial c...

Journal: :The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists 1955

2008
Yukio Isozaki Jianxin Yao Zhangshen Ji Masafumi Saitoh Noritada Kobayashi Harutaka Sakai

The Capitanian (Late Guadalupian) Maokou Formation at Chaotian in northern Sichuan, South China, is composed mainly of shallow marine shelf carbonates deposited on the Tethyan side of South China. By detailed field mapping and scientific drilling, we newly found out unique fossil assemblages and a sharp lithologic change in the upper part of the Maokou Formation. The main part of the Maokou For...

Journal: :Ground water 2005
Alan M MacDonald Simon J Kemp Jeff Davies

Many people in sub-Saharan Africa have to rely on meager water resources within mudstones for their only water supply. Although mudstones have been extensively researched for their low permeability behavior, little research has been undertaken to examine their ability to provide sustainable water supplies. To investigate the factors controlling the occurrence of usable ground water in mudstone ...

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