The Yangtze Block records Neoproterozoic magmatism and sedimentation related to the breakup of Rodinia is an important piece in reconstruction supercontinent. However, tectonic setting position this block remain a subject debate. In present study, we report zircon U-Pb ages Hf isotopic composition geochemical Nd-Pb compositions for meta-volcanic rocks exposed Zhangbaling uplift NE Block. volcan...

In this paper, we focus on the geological features of volcanic edifices and geochemistry intermediate–basic rocks Shaerbuti Mountain, which offer a new perspective recycled materials in study area. The consist calc-alkali basalt andesite formed an arc setting. porphyroclastic texture basalt, explosive breccia rock, distribution both agglomerate provide robust evidence that edifice exists Mounta...

The Muria-Peninsula is a Quaternary volcano located in the northern Sunda arc. Its activity was controlled under high potassic and very magma series resulting leucite-rich trachyte pyroxene-rich basaltic-andesite. It strato-type that composed of lava, breccia, tuff layers, some dikes have volcanic craters maars varying age composition. study area covering volcanoes Muria, Genuk, Patiayam. This ...

New Zealand’s newest and most active volcano, Mt. Ngauruhoe in the Taupo Volcanic Zone, produced andesite fl ows in 1949 and 1954, and avalanche deposits in 1975. Potassium-argon “dating” of fi ve of these fl ows and deposits yielded K-Ar model “ages” from <0.27 Ma to 3.5±0.2 Ma. “Dates” could not be reproduced, even from splits of the same samples from the same fl ow, the explanation being var...

A gravel pit in south central Stearns County, Minnesota exposes sand and gravel of the Merden Lake esker which is thought to have been deposited by a subglacial stream associated with the Wisconsinan-aged Superior Lobe of the Laurentide ice sheet. An analysis of these sediments was conducted from samples collected through a vertical trench on an east-facing exposure of the gravel pit. A total o...

The Mars Global Surveyor mission carries a remote-sensing gizmo called the Thermal Emission Spectrometer (TES). TES detects heat waves flowing from the surface of the Red Planet. The TES team, led by Phil Christensen (Arizona State University), identified two large regions on Mars that have distinctive spectral properties. Using mathematical mixing calculations based on the thermal emission spe...