Results 31 to 40 of about 3,256 (202)

Mesoproterozoic geology of the Nampula Block, northern Mozambique: Tracing fragments of Mesoproterozoic crust in the heart of Gondwana [PDF]

Precambrian Research, 2010
The Nampula Block covers over 100,000 km2, making it the largest Mesoproterozoic crustal segment in northern Mozambique and an important component of the Neoproterozoic to Cambrian (Pan-African) East African Orogen. It is bounded in the north by the WSW–ENE trending Lurio Belt.
Macey, P. H, Thomas, R. J., Grantham, G. H., Ingram, B. A., Jacobs, J., Armstrong, R. A., Roberts, M. P., Bingen, B., Hollick, L., de Kock, G. S., VIOLA, GIULIO, Bauer, W., Gonzales, E., Bjerkgård, T., Henderson, I. H. C., Sandstad, J. S., Cronwright, M. S., Harley, S., Solli, A., Nordgulen, Ø., Motuza, G., Daudi, E., Manhiça, V.   +22 more
openaire   +3 more sources

TWO PULSES OF MAGMATIC ACTIVITY DURING THE EARLY RIPHEAN KUONAMKA IGNEOUS PROVINCE FORMATION: PALEOMAGNETIC SUBSTANTIATION OF THE HYPOTHESIS

Геодинамика и тектонофизика
By the beginning of the 20th century, at least ten different generations of intrusive mafic bodies 1800–900 Ma were distinguished on the territory of the Anabar massif.
A. M. Pasenko, I. V. Fedyukin, V. E. Pavlov   +2 more
doaj   +1 more source

Hydrocarbon generation potential and organic matter accumulation patterns in organic-rich shale during the mesoproterozoic oxygenation event: evidence from the Xiamaling formation shale

Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 2023
A significant deposition of black shales occurred during the Mesoproterozoic Oxygenation Event (MOE). In order to investigate the hydrocarbon generation potential and organic matter enrichment mechanism of these shale deposits, we studied the Xiamaling ...
Huan Miao, Zhenxue Jiang, Xianglu Tang, Ze Deng, Chengju Zhang, Zhikai Liang, Yuguang Shi   +6 more
doaj   +1 more source

Geological conditions of natural gas accumulation and new exploration areas in the Mesoproterozoic to Lower Paleozoic of Ordos Basin, NW China

Petroleum Exploration and Development, 2019
Based on field outcrop investigation, interpretation and analysis of drilling and seismic data, and consulting on a large number of previous research results, the characteristics of ancient marine hydrocarbon source rocks, favorable reservoir facies ...
Jinhu DU, Xiangbo LI, Hongping BAO, Wanglin XU, Yating WANG, Junping HUANG, Hongbo WANG, Rong WANYAN, Jing WANG   +8 more
doaj   +1 more source

The Mesoproterozoic sub-Heddersvatnet unconformity, Telemark, South Norway [PDF]

Bulletin of the Geological Society of Finland, 2005
The 1.51 Ga Rjukan group,Telemark, S Norway, is divided into felsic volcanic rocks of the Tuddal formation and mafic rocks of the Vemork formation. It is overlain by the sedimentary rocks of the Vindeggen group (1.50-1.17 Ga), starting with the arkosic ...
K. Laajoki
doaj   +1 more source

A revised lower estimate of ozone columns during Earth’s oxygenated history

Royal Society Open Science, 2022
The history of molecular oxygen (O2) in Earth’s atmosphere is still debated; however, geological evidence supports at least two major episodes where O2 increased by an order of magnitude or more: the Great Oxidation Event (GOE) and the Neoproterozoic ...
G. J. Cooke, D. R. Marsh, C. Walsh, B. Black, J.-F. Lamarque   +4 more
doaj   +1 more source

The Difunta Correa metasedimentary sequence (NW Argentina): relict of a Neoproterozoic platform? — elemental and Sr-Nd isotope evidence

Revista Mexicana de Ciencias Geológicas, 2018
The Sierra de Pie de Palo (Western Sierras Pampeanas, Argentina) in the Andean foreland is mainly formed by a Mesoproterozoic basement and an Ediacaran metasedimentary cover referred to as the Difunta Correa metasedimentary sequence.
Carlos Ramacciotti, César Casquet, Edgardo Baldo, Carmen Galindo   +3 more
doaj   +1 more source

The mesoproterozoic sub-Lifjell unconformity, central Telemark, Norway [PDF]

Bulletin of the Geological Society of Finland, 2006
The sub-Lifjell unconformity subdivides the traditional Seljord group of the Telemark supracrustals, south Norway, into the Vindeggen and Lifjell groups.
K. Laajoki
doaj   +1 more source

Notable Impact of Paleotectonic Stress on Gold Mineralisation in the West Qinling Orogen

Geological Journal, EarlyView.
By applying fuzzy clustering and multiple inverse methods, we systematically processed the data of vein and fault slip in this ore deposit to reveal the transition of orogenic geological environment and paleotectonic stress field. Our research results show two different stress states: the northwest–southeast extensional stress field and the northeast ...
Hongyan Wang, Aibing Chen, Jian Yang, Yuan Zhang   +3 more
wiley   +1 more source

Isolated in the highlands, found in the museum: A new species of Characidium (Crenuchidae) from a Bolivian National Park, with a CT scan revealing features

Journal of Fish Biology, EarlyView.
Abstract A new species of Characidium is described from a small, isolated river in the highland areas of Noel Kempff Mercado National Park, Bolivia. The new taxon can be diagnosed by the presence of a relatively broad and conspicuous dark midlateral stripe extending from the tip of snout to the base of the caudal fin, markedly darker than the vertical ...
Leonardo Oliveira‐Silva, Karina Or, Angela Zanata, Scott A. Schaefer   +3 more
wiley   +1 more source