Jeofizikkulubu | Geophysics

Jeofizikkulubu | Geophysics

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Chandra Reveals the Elemental Nature of Cassiopeia A
Where do most of the elements essential for life on Earth come from? The answer: inside the furnaces of stars and the explosions that mark...
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Fluid and metal sources of the Changfagou porphyry copper deposit, southern Jilin Province, NE China: Constraints from fluid inclusions and H-O-S-Pb isotope systematics
The Changfagou copper deposit, a newly discovered porphyry deposit in the southern Jilin Province, NE China, is tectonically located on the northeastern margin of the...
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Archaeologists uneasy as Trump shrinks Bears Ears monument lands
Thousands of ancient Native American sites to lose protections.
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Ancient weakening of Earth’s crust explains unusual intraplate earthquakes
New research reveals that mysterious intraplate seismic zones underwent significant deformation hundreds of millions of years ago.
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Chandra Reveals the Elemental Nature of Cassiopeia A
Where do most of the elements essential for life on Earth come from? The answer: inside the furnaces of stars and the explosions that mark...
Read More
Fluid and metal sources of the Changfagou porphyry copper deposit, southern Jilin Province, NE China: Constraints from fluid inclusions and H-O-S-Pb isotope systematics
The Changfagou copper deposit, a newly discovered porphyry deposit in the southern Jilin Province, NE China, is tectonically located on the northeastern margin of the...
Read More
Archaeologists uneasy as Trump shrinks Bears Ears monument lands
Thousands of ancient Native American sites to lose protections.
Read More
Ancient weakening of Earth’s crust explains unusual intraplate earthquakes
New research reveals that mysterious intraplate seismic zones underwent significant deformation hundreds of millions of years ago.
Read More
Cleaning the interior of container and tank wagon
Nearly all deposits in tankers, containers and tank wagons can be removed by high-pressure water. Conventional cleaning of containers and tanks of all types is...
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Mkango Announces Conditional Acceptance Of Talaxis Transaction By TSX Venture Exchange Subject Only To Shareholder Approval
London / Calgary: December 11, 2017 - Mkango Resources Ltd. (AIM/TSX-V: MKA) (the \'Company\' or \'Mkango\') is pleased to announce that the TSX Venture Exchange...
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Arctic fishing, robot explorers and Chinese medicines
The week in science: 1–7 December 2017.
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Wanted: academics wise to the needs of government
Funders should not support policy-relevant work that treats policy impact as an afterthought, advises Chris Tyler.
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Dark Fiber: Using Sensors Beneath Our Feet to Tell Us About Earthquakes, Water, and Other Geophysical Phenomenon

Scientists have shown for the first time that dark fiber – the vast network of unused fiber-optic cables installed throughout the country and the world – can be used as sensors for detecting earthquakes, the presence of groundwater, changes in permafrost conditions, and a variety of other subsurface activity.

Late Neoproterozoic–Early Palaeozoic stratigraphic succession, Western Himalaya, North Pakistan: Detrital zircon provenance and tectonic implications

This paper presents the first ever detrital zircon U–Pb–Hf isotopic study for the Late Neoproterozoic–Early Palaeozoic stratigraphic succession exposed in the Hazara Basin, Western Himalaya, North Pakistan. This time span represents the break-up of the supercontinent Rodinia and final assembly of Gondwana. The detrital record of the Late Neoproterozoic succession indicates well-mixed detritus shed from within the Indian Craton, especially the Central Indian provenance (including the Delhi Fold Belt, Aravalli Orogen, and Bundlekhand Craton). The εHf(t) values are mostly negative, and Hf TDMC ages are clustered at 2.0–2.4 Ga, which indicates the derivation from an ancient reworked crustal source. In addition, the presence of a few positive εHf(t) values in the Late Neoproterozoic sequence indicates addition of the juvenile crust that corresponds to the period of the Rodinia break-up. However, dissimilarities with detrital signatures from the Australian continent may indicate break-up of the Rodinia supercontinent and detachment of Australia from India prior to ~754 Ma, which is the depositional age of the Hazara Formation. In addition, the angular unconformity at the base of the Abbottabad Formation represents the compressional tectonics that might be associated with the Pan-African (Indo-Antarctic Craton collision with the East African Orogen during 800–700 Ma) orogeny. The presence of the metamorphism and deformation in the rocks below the unconformity supports such an event prior to deposition of the Early Palaeozoic Abbottabad Formation. Similarly, the appearance of the Pan-African detritus in the Early Palaeozoic Abbottabad Formation could be due to closure of the ocean basin between Eastern and Western Gondwana along the Mozambique Suture. This provenance change may indicate the final assembly of supercontinent Gondwana.