Results 171 to 180 of about 28,842 (211)

SHRIMP U-Pb zircon geochronology of the Narryer Gneiss Complex, Western Australia

Precambrian Research, 1991
Abstract SHRIMP U-Pb zircon geochronology of the Narryer Gneiss Complex of the Yilgarn Craton, Australia, has confirmed that its eastern half contains abundant early Archaean gneisses (3300–3730 Ma), but has found gneisses with ages of only 3000 Ma or less in its western half.
Allen P. Nutman, Peter D. Kinny, William Compston, Ian S. Williams   +3 more
openaire   +1 more source

Isotopic U–Pb-SHRIMP dating of Mugodzhari eclogites (Kazakhstan)

Доклады Российской академии наук. Науки о Земле / Doklady Earth Sciences
In the extreme south of the Urals, zircons from eclogites and amphibolite were dated in metamorphites of the East Mugodzhar zone. Of the 4 eclogite samples, close (and the most “ancient” – 520±4 million years) concordant age values were obtained in 3 samples, which probably corresponds to the age of the protolith.
openaire   +1 more source

Granitoid evolution in Sinai, Egypt, based on precise SHRIMP U–Pb zircon geochronology

Gondwana Research, 2009
Abstract Late-stage Pan-African granitoids, including monzogranite, syenogranite and alkali granite, were collected from four separate localities in Sinai. They were selected to represent both the calc-alkaline and alkaline suites that have been viewed as forming separate magmatic episodes in the Eastern Desert of Egypt, with the transition to alkali
B.H. Ali, S.A. Wilde, M.M.A. Gabr
openaire   +1 more source

Late Paleozoic Tectonic Analysis and Geochronology Study by Shrimp Zircon U-Pb Dating

Chemistry and Technology of Fuels and Oils, 2019
Sinkiang Hami Redstone Copper in China is a super-large volcanic hydrothermal deposit formed as a result of multi-stage secondary tectonic activity in the Hercynian period of tectonic movement. In this work, we have studied the effect of the geomechanical nature on the structure of faults stretched in different directions and have studied the age of ...
Dongyu Li, Zhengxi Yang, Kanghui Thong, Xianxing Wu, Xiaodong Chen   +4 more
openaire   +1 more source

独居石和锆石SHRIMP U-Pb定年对比

Chinese Science Bulletin, 2004
独居石定年在地质年代学研究中占有重要的地位. 然而, 相对于锆石, 独居石SHRIMP U-Pb定年方法应用较少. 对2个岩浆岩体中岩浆成因独居石和锆石SHRIMP U-Pb定年结果进行了对比, 表明北京离子探针中心独居石SHRIMP U-Pb定年方法是可行的, 为独居石精确定年打下了基础.
openaire   +1 more source

پتروژنز و تعیین سن U-Pb(SHRIMP) توده نفوذی چلتیان، غرب جیرفت

2019
ترکیب عمومی توده گرانیتوئیدی چلتیان که در منتهی‌الیه جنوب‌شرقی زون سنندج-سیرجان قرار گرفته است، ترونجمیتی Al پایین با ماهیت تولئیتی تا ترانزیشنال می‌باشد. این توده درون نهشته‌های رسوبی-آتشفشانی اوایل مزوزوئیک نفوذ نموده است. برپایه سن‌سنجی بلورهای زیرکن که به روش(SHRIMP) Pb-U انجام شد، سن توده مورد مطالعه187.5±3.2 میلیون سال برآورد شده است.
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Conventional and SHRIMP U-Pb Zircon Dating of the Chor Granitoid, Himachal Himalaya

Journal of the Geological Society of India, 2003
Abstract Conventional zircon U-Pb analyses of optically clear multi-grain fractions from the Chor Granitoid sample - CH 174 provide a complex pattern with eight points yielding a reference line with an upper intercept age of c. 910 Ma and large scatter. Three zircon fractions from the more deformed sample CH 4/11 of this body define a
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SHRIMP-II U–Pb dating of perovskite from ultramafic-alkaline intrusion

Geochimica et Cosmochimica Acta, 2006
D.I. Matukov, E.N. Lepekhina, E.A. Bagdasarov, A.V. Antonov, S.A. Sergeev   +4 more
openaire   +1 more source

Shrimp U/Pb ages of perovskite and zircon from Yakutian kimberlites

International Kimberlite Conference Extended Abstracts 1995, 1995
Peter D. Kinny, Brendon J. Griffin, Felix F. Brakhfogel   +2 more
openaire   +1 more source

Recent advances of selected novel processing techniques on shrimp allergenicity: A review

Trends in Food Science and Technology, 2022
Xin Dong
exaly