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Transcripts For CNN CNN Newsroom Live 20240612

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IRCON Recruitment 2022: 25 vacancies of managers and engineers on offer

IRCON Recruitment 2022: 25 vacancies of managers and engineers on offer : Rashtra News #IRCON #Recruitment #vacancies #managers #engineers #offer IRCON International Limited has invited application for Various Manager and Engineer posts. Interested candidates can apply to the posts through the prescribed format on 28 and 30 March 2022.Candidates can check the detailed notification on

Magmatic cyclicity and episodic continental growth of the Australian T by Qing Zhang, Ross N Mitchell et al

The hafnium isotopes of zircon have recently been identified as a new means of detecting magmatic cyclicity. A hierarchy of possible magmatic cycles has been verified, ranging from the ∼600 Myr supercontinent cycle to 10–20 Myr plutonic cycles. While the supercontinent cycle is well-established, the shorter mantle convective and plutonic cycles require further work to understand how magmatic dynamics may give rise to such cyclicity. In this study, we analyze in detail the long-lived orogenic system of the Australian Tasmanides, and a hierarchy of cycles is visible, including a ∼ 290 Myr accretionary/orogenic cycle, a ∼ 65 Myr upper mantle cycle, and 20–10 Myr magmatic and plutonic cycles. These cycles correlate with the evolution of the orogens and episodic continental growth of eastern Gondwana. The surprising similarity in period length between the opening/closing of a typical Atlantic-like Wilson cycle to the case here of the lifecycle of a West Pacific-type arc system may

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