نتایج جستجو برای: burial metamorphism
تعداد نتایج: 7218 فیلتر نتایج به سال:
The pre-Alpine evolution of the Tethyan domains between Gondwana and Laurasia, in particular that Cimmerian continental blocks, remains poorly constrained. Central Iran is a key area to constrain closure Paleotethys collision Laurasia with blocks drifted from Gondwana. present study provides combined metamorphic geochronologic approach focused on two areas Iran: Kashmar-Kerman Tectonic Zone (KK...
The high-pressure (HP) eclogites in the central Himalaya provide insights into metamorphism and exhumation history of crustal material beneath Tibetan plateau. Due to paucity exposure, nature timing protolith remain poorly known. Here we report zircon titanite U–Pb ages, bulk-rock mineral compositions Hf isotope data on from Thongmön Kharta areas Himalaya. record peak HP eclogite-facies at >1.6...
Both competition and burial are important factors that influence plant growth and structuring plant communities. Competition intensity may decline with increased burial stress. However, experimental evidence is scarce. The aim of this study was to elucidate the role of burial stress in influencing plant competition by investigating biomass accumulation, biomass allocation, and clonal growth per...
The Paleoproterozoic Era witnessed crucial steps in the evolution of Earth's surface environments following the first appreciable rise of free atmospheric oxygen concentrations ∼2.3 to 2.1 Ga ago, and concomitant shallow ocean oxygenation. While most sedimentary successions deposited during this time interval have experienced thermal overprinting from burial diagenesis and metamorphism, the ca....
Clay minerals from the three principal kinds of zeolitic sediments from the type area for zeolite facies alteration, the Triassic Murihiku Supergroup, Southland, New Zealand, have been studied by TEM. Bentonitic tuff consists largely of smectite and heulandite with minor illite; they occur as replacements of glass shards and are inferred to be direct alteration products of tuff alteration. Both...
3 INTRODUCTION 4 Aim and approach 4 Structural domains in the Swedish part of the Baltic Shield defined by deformation zones and formline patterns 4 Age and character of high-T deformation zones in the Baltic Shield 6 GEOLOGY OF EAST CENTRAL SWEDEN 7 Rocks and ages 7 Metamorphism 8 Typical features of low pressure-high temperature metamorphism 9
Northern forests are important ecosystems for carbon (C) cycling and lakes within them process and bury large amounts of organic-C. Current burial estimates are poorly constrained and may discount other shifts in organic-C burial driven by global change. Here we analyse a suite of northern lakes to determine trends in organic-C burial throughout the Anthropocene. We found burial rates increased...
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