Results 61 to 70 of about 66,668 (274)

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

Detrital zircon SHRIMP U-Pb age study of the Cordillera Darwin Metamorphic Complex of Tierra del Fuego : sedimentary sources and implications for the evolution of the Pacific margin of Gondwana [PDF]

, 2010
The Cordillera Darwin Metamorphic Complex in the southernmost Andes includes a basement of probable Palaeozoic age, a mid-Jurassic and younger volcano-sedimentary cover, and a suite of Jurassic granites, all of which were jointly metamorphosed during the
Calderon, M., Fanning, C.M., Herve, F., Klepeis, K., Mpodozis, C., Pankhurst, R.J., Thomson, S.N.   +6 more
core   +1 more source

Late Ordovician Palynomorphs [PDF]

Journal of Micropalaeontology, 1985
Abstract. ACRITARCHSOrdovician acritarchs have been recorded in five core samples collected between 2520 ft. and 3000 ft. in Well E1-81, and ten cutting samples taken between 12150 ft. and 13240 ft. in Well J1-81A. All the assemblages recovered are of Late Ordovician age; no Early Ordovician or Middle Ordovician assemblages have been identified ...
Molyneux, S. G., Paris, F.
openaire   +2 more sources

The effect of early diagenetic processes on the quantification of fossil micrometeorite abundance and flux in the geological record

Meteoritics &Planetary Science, EarlyView.
Abstract Fossil micrometeorites (MMs) recovered from lithified sedimentary rocks, particularly iron‐rich (I‐type) cosmic spherules (CSs) provide valuable insights into past dust‐forming events. Their abundances, when combined with estimates of local sedimentation rates can be used to reconstruct the flux of extraterrestrial dust.
Isabelle S. Mattia, Matthew J. Genge, Martin D. Suttle   +2 more
wiley   +1 more source

Main constrains and dynamic process of Ordovician hydrocarbon accumulation, central and western Tahe Oil Field, Tarim Basin

Shiyou shiyan dizhi, 2021
Diversified types of oil and gas resources have been discovered in the Ordovician strata of central and western parts of the Tahe Oil Field, Tarim Basin.
Yongqiang ZHAO, Lu YUN, Bin WANG, Feng GENG, Haiying LI, Yi GU, Yongli LIU   +6 more
doaj   +1 more source

Kinetics of oil-cracking of ultra-deep Ordovician oil in the North Shuntuoguole area of Tarim Basin and its geological implications

Shiyou shiyan dizhi, 2021
With the expansion to the deep strata for the exploration of marine oil and gas in the Tarim Basin, the upper limit of temperature for the occurrence of ultra-deep reservoirs has become a scientific concerning of organic geochemistry and petroleum ...
Huili LI, Anlai MA, Xunyu CAI, Huixi LIN, Jianjiao LI, Jinzhong LIU, Xiuxiang ZHU, Xian WU   +7 more
doaj   +1 more source

Paleomagnetism of Upper Vendian sediments from the Winter Coast, White Sea region, Russia: Implications for the paleogeography of Baltica during Neoproterozoic times [PDF]

, 2002
Paleomagnetic results from an Upper Vendian sedimentary sequence exposed along the White Sea shoreline, NW Russia are described. These classical exposures have been the subject of intense paleontological investigations due to their well-preserved ...
Alexander Iosifidi, Alexei Khramov, Bingen, Dalziel, Fedonkin, Fisher, Grazhdankin, Hargraves, Hoffman, Jennifer Tait, Kirschvink, Knoll, Martin, McCabe, McFadden, McKerrow, Meert, Meert, Piper, Piper, Pisarevsky, Poorter, Poorter, Powell, Smethurst, Sokolov, Storetvedt, Torsvik, Torsvik, Torsvik, Valerian Bachtadse, Van der Voo, Viktor Popov, Williams, Zijderveld   +34 more
core   +1 more source

Reservoir space characterization of vuggy carbonate reservoirs with multiple scales: a case study of Ma 5-7 interval, Middle Ordovician Majiagou Formation, Daniudi area, Ordos Basin

Shiyou shiyan dizhi, 2021
The reservoir space of carbonate rocks is of multiple scales and genesis mechanisms, and it is difficult to accurately demonstrate the reservoir space as well as physical properties.Millimeter-, micro- and nano-scale reservoir spaces were all developed ...
Xiaoqi DING, Xin LIU, Zhuangzhuang QI, Wei ZHANG, Sihong LIU   +4 more
doaj   +1 more source

Spatial Distribution of the Surface Geology and 1992 Land Use of the Buffalo River Watershed [PDF]

, 1995
The Buffalo River was established by Congress in 1972 as the first National River in the United States and is one of the few remaining free-flowing streams in Arkansas .
Hofer, Kimberly R., McKimmey, James M., Scott, H. Don   +2 more
core   +2 more sources

Research progress on marine oil and gas accumulation in Tarim Basin

Shiyou shiyan dizhi, 2020
In recent years, great achievements have been made in the exploration of ultra-deep marine oil and gas in the Tarim Basin. New oil and gas discoveries have been achieved in the Shunbei Ordovician, Tazhong Cambrian and Tahe deep strata, which provide ...
Yi GU, Jiwen HUANG, Cunshan JIA, Zhibing SHAO, Yongge SUN, Qinghua LU   +5 more
doaj   +1 more source