Results 71 to 80 of about 14,112 (239)

The Unexpected Discovery of Paleocene? Coals in Outcrops Thought to Be Cambrian, Al Huqf, Oman

Journal of Petroleum Geology, EarlyView.
ABSTRACT Two brown organic deposits were encountered whilst investigating kaolinitic claystones thought to occur at the base of a Cambrian formation at outcrop. The age of these organic deposits is probably Paleocene from palynology. Organic petrography shows that they are subbituminous coals with some oil source potential.
Mohammed H. Al Kindi, Alan P. Heward, Lorraine B. Eglinton, Steve R. Packer, Darrin T. Stead   +4 more
wiley   +1 more source

Petrography

, 1937
Photo of the inside of Williams Hall, Petrography ...

core  

(Table 1) Petrography at DSDP Leg 84 holes

, 1985
(Table 1) Petrography at DSDP Leg 84 ...
R. Helm, Roger Helm (6966650), Helm, Roger   +2 more
core   +1 more source

Lithogenesis on peneplaned сontinented platform of Kazakhstan and Siberia during the Cretaceous-Paleogene boundary epoch

Литосфера, 2019
Research subject. The inner structure, composition, and genesis of the poorly studied formation of weathering crusts are studied with reference to peneplaned platform territories in Kazakhstan and Siberia during the Cretaceous-Paleogene boundary epoch ...
Yu. G. Tsekhovskii, В. А. Bogatyrev, V. V. Zhukov   +2 more
doaj   +1 more source

New knowledge about shock events that affected the L‐chondrite parent body from two heavily shocked L6 meteorite finds

Meteoritics &Planetary Science, EarlyView.
Abstract We report new results from a study of shock‐related features in the L6 ordinary chondrites Northwest Africa (NWA) 4672 and NWA 12841. Our observations confirm the occurrence of eight high‐pressure (HP) minerals in each meteorite, namely, ringwoodite, majorite, akimotoite, wadsleyite, albitic jadeite, lingunite, tuite, and xieite.
I. Baziotis, L. Ferrière, C. Ma, J. Hu, D. Palles, P. D. Asimow   +5 more
wiley   +1 more source

(Table 1) Petrography of Alborán Basin igneous rocks

, 2008
(Table 1) Petrography of Alborán Basin igneous ...
Hauff, Folkmar, Oates, N, Jörg Geldmacher (6972650), Folkmar Hauff (6962075), Hoernle, Kaj, Matthew F Thirlwall (6967508), Lowry, David, Andreas Klügel (6968789), Duggen, Svend, Geldmacher, Jörg, David Lowry (2647906), Thirlwall, Matthew F, Klügel, Andreas, Kaj Hoernle (6962069), N Oates (6972653), Svend Duggen (6962072)   +15 more
core   +1 more source

The Role of Placer Deposits in Ensuring the Reproduction of the Mineral Resource Base of Scarce Types of Strategic Mineral Raw Materials in Russia at the Present Stage

Russian Journal of Earth Sciences
Placer deposits had (and for a number of components still have) an important role in providing strategic types of mineral resource base for both Russia and the world as a whole.
Bortnikov N. S., Volkov A. V., Lalomov A. V., Bochneva A. A., Ivanova Yu. N., Lalomov D. A.   +5 more
doaj   +1 more source

Thortveitite-type Tm2Si2O7

Acta Crystallographica Section E, 2014
Single crystals of dithulium disilicate, Tm2Si2O7, were obtained in flux synthesis experiments in the system SiO2–Tm2O3–LiF at ambient pressure. The compound belongs to the group of sorosilicates, i.e. it is based on [Si2O7]-units and crystallizes in the
Volker Kahlenberg, Paul Aichholzer
doaj   +1 more source

The development of numerical forecasting systems of primary sources of gold on the results of placer sampling in the example Vagran placer cluster (North Urals)

Georesursy, 2020
Based on the results of field research, as well as data from stock reports, two types of placer gold were identified within the Vagran placer cluster, which are indicators of primary mineralization.
Alexander V. Lalomov, Anna A. Bochneva , Roman M. Chefranov   +2 more
doaj   +1 more source

Vertical profiling of shock attenuation at the Rochechouart impact structure, France

Meteoritics &Planetary Science, EarlyView.
Abstract Rochechouart, south‐west France, is a complex impact structure. Here, we present the first report of shock barometry of quartz from what are likely parautochthonous basement units at depth, based on samples from the 2017 C.I.R.I.R drilling campaign. The crystallographic orientations of 725 sets of PDFs in 512 quartz grains in samples from four
P. Struzynska, S. Alwmark, C. Alwmark, M. H. Poelchau, P. Lambert   +4 more
wiley   +1 more source