Chad D. Deering

Chad D. Deering
Michigan Technological University | MTU · Department of Geological/Mining Engineering & Sciences

PhD

About

90
Publications
24,255
Reads
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1,842
Citations
Introduction
My long-term goal is to help develop an integrated model for crustal magmatism, particularly in volcanic arcs, by coupling geochemical data with quantitative textural analyses in an effort to better understand the physical dynamics of crystal-melt evolution in magma reservoirs.
Additional affiliations
December 2013 - November 2021
Michigan Technological University
Position
  • Professor (Associate)
Description
  • Courses taught: Mineral Science, Introduction to Petrology, Field Geology with Engineering Applications, Geochemistry, and Magma Reservoir Dynamics
August 2011 - December 2013
University of Wisconsin - Oshkosh
Position
  • Professor (Assistant)
August 2011 - December 2013
University of Wisconsin - Oshkosh
Position
  • Professor (Assistant)
Description
  • Courses taught: Physical Geology, Lithology, Geochemistry, Energy and Mineral Resources, Field Course in Geology (Yellowstone National Park)
Education
April 2006 - June 2009
University of Canterbury
Field of study
  • Igneous Petrology and Geochemistry
August 2003 - August 2005
Michigan State University
Field of study
  • Igneous Petrology and Geochemistry
August 2000 - May 2003
Michigan State University
Field of study
  • Geological Sciences

Publications

Publications (90)
Article
Full-text available
The integration of detrital zircon age and trace element analyses provides a powerful tool with which to reconstruct continental arc evolution. Detrital zircons from the Ross-Delamerian orogen along the Pacific-Gondwana margin in north Victoria Land in Antarctica yield a broad 700–500 Ma U-Pb age population that shows a prominent period of activity...
Article
Full-text available
The potential petrogenetic link between a crystal-poor rhyolite (the Rhyolite Canyon Tuff) and its associated subvolcanic intrusion and crystal-rich post-caldera lavas from Turkey Creek, Arizona (USA), is examined using zircon chemical abrasion–thermal ionization mass spectrometry U-Pb geochronology and inductively coupled plasma mass spectrometry...
Article
Full-text available
Granitoid lithic clasts from the 0.7 ka Kaharoa eruption at the Tarawera volcano (Okataina Volcanic Complex, Taupo Volcanic Zone, New Zealand) provide insight into the processes of rhyolite formation. The plutonic lithic clasts of the Kaharoa eruption consist of (1) quartz phenocrysts, which are often grouped into clusters of two to eight quartz gr...
Article
Full-text available
This contribution provides in-situ LA-ICP-MS U-Pb ages and trace element determinations of zircons from dacitic to rhyolitic lavas, ignimbrites and intrusions in the Southern Rocky Mountain Volcanic Field (SRMVF) in Colorado, USA. The data record a period of intense magmatic activity in the Oligocene-early Miocene (∼37-22 Ma) which gave rise to som...
Article
Oceans cover 70% of Earth's surface, setting it apart from the other terrestrial planets in the solar system, but the mechanisms driving oceanic chemical evolution through time remain an important unresolved problem. Imbalance in the strontium cycle, introduced, for example, by increases in continental weathering associated with mountain building,...
Article
Studies synthesizing field work, numerical simulations, petrology, geochemistry, and geophysical observations indicate that the compositional diversity of arc lavas results from evolution of mantle-derived magmas by mixing, assimilation, and fractional crystallization. This evolution occurs within complexes called transcrustal magmatic systems. The...
Article
Sedimentological and zircon U–Pb–Hf isotopic analyses of the Carboniferous strata in the Bainaimiao arc belt (BAB) provide provenance information for the northern margin of the North China Craton (NCC). The late Carboniferous strata in the eastern BAB were dominantly shallow marine carbonate-clastic deposits. Detrital zircon data show that: (1) san...
Article
Orogenic crustal thickening leads to increased continental elevation and runoff into the oceans, but there are fundamental uncertainties in the temporal patterns of thickening through Earth history. U‐Pb age and trace element data in detrital zircons from Antarctica are consistent with recent global analyses suggesting two dominant peaks in average...
Article
Reconstruction of the physiochemical characteristics of fossil hydrothermal systems can help guide exploration for modern geothermal or mineral resources in similar settings. The 22.9 Ma Lake City caldera in Colorado, U.S.A., is well-exposed and contains an exhumed fossil shallow hydrothermal system. In this study, alteration mineralogy, vein textu...
Article
The Neoarchaean crustal evolutionary processes of the North China Craton (NCC) provide a window to understanding the crust–mantle interaction in the Early Earth. The Jiefangyingzi amphibolites are located in the Bainaimiao arc belt, along the northern margin of the NCC. LA–ICP–MS U–Pb isotopic data reveal that the Type 1 amphibolites were formed at...
Article
Textural and chemical heterogeneities in igneous quartz crystals preserve unique records of silicic magma evolution, yet their origins and applications are controversial. To improve our understanding of quartz textures and their formation, we examine those in crystal-laden rhyolites produced by the 74 ka Toba supereruption (>2800 km3) and its post-...
Article
Lake City Caldera (22.93 ± 0.02 Ma) is the youngest of 25 Tertiary calderas within the Southern Rocky Mountain Volcanic Field (SRMVF) and offers an opportunity to study the relationship between plutonic rocks and their volcanic equivalents. Extreme topographical relief of the area reveals the three-dimensional exposure of a complex, high-K calc-alk...
Article
The deposits of large volcanic eruptions provide the sole record of the architecture of magmatic plumbing systems in the moments when large pools of crystal-poor, eruptible magma are present in the crust. It is widely accepted that silicic magmas form by segregation of melt-rich, crystal-poor magma from a crystal-rich source; however, the depths at...
Article
The spatial distribution of diffuse soil degassing from a volcanic source and quantifying of the amount of gas release are key aspects for understanding the gas release pattern. The measurement of the entirety of a particular area of interest cannot be possible due to obvious logistical and economic restrictions. To reduce the logistic and economic...
Article
We characterized volatile emissions based upon diffuse soil degassing measurements and fumarolic gas chemistry at Crater Hills, a thermally-altered area adjoining the Sour Creek resurgent dome that is located within the Yellowstone Caldera. The objective of this study was to investigate the source and flux of CO 2 and H 2 S gases to improve our und...
Conference Paper
Full-text available
The Bear Lake igneous body is located near Michigan's McLain State Park in the southwest side of the Keweenaw Peninsula (sections 24 and 25, T56N, R34W) and represents the youngest known magmatic activity of the Midcontinent Rift. Bear Lake was mapped as an intrusive rhyolite (Cornwall and Wright, 1956) cross-cutting the Freda Sandstone of the Oron...
Article
Full-text available
Very large eruptions (>50 km ³ ) and supereruptions (>450 km ³ ) reveal Earth’s capacity to produce and store enormous quantities (>1000 km ³ ) of crystal-poor, eruptible magma in the shallow crust. We explore the interplay between crustal evolution and volcanism during a volcanic flare-up in the Taupo Volcanic Zone (TVZ, New Zealand) using a combi...
Article
Full-text available
Alkaline magmatism associated with the West Antarctic rift system in the northwest Ross Sea (NWRS) includes a north-south chain of shield volcano complexes extending 260 km along the coast of Northern Victoria Land (NVL) as well as numerous small volcanic seamounts located on the continental shelf and hundreds more within a ~35,000 km2 area of the...
Article
In a recent paper, we used Li concentration profiles and U-Th ages to constrain the thermal conditions of magma storage. Wilson and co-authors argue that the data instead reflect control of Li behavior by charge balance during partitioning and not by experimentally determined diffusion rates. Their arguments are based on (i) a coupled diffusion mec...
Article
In this study, we quantitatively investigate crystal-melt segregation processes in two upper-crustal, intermediate-to-silicic plutons from the Tertiary Adamello Batholith, Italian Alps, by combining (1) an estimation of the amount of crystallized interstitial liquid using cathodoluminescence images, phase maps, and mass-balance calculations with (2...
Article
Full-text available
Long-term cycles in Earth’s climate are thought to be primarily controlled by changes in atmospheric CO2 concentrations. Changes in carbon emissions from volcanic activity can create an imbalance in the carbon cycle. Large-scale changes in volcanic activity have been inferred from proxies such as the age abundance of detrital zircons, but the magni...
Article
Silicic caldera volcanoes are often associated with hydrothermal systems economically important for electricity generation and localization of ore deposits. Despite their potential importance, the poor exposure that is typical in caldera settings has limited the number of detailed studies of the relationship between caldera structures and fluid flo...
Article
Full-text available
Detrital zircon U-Pb and trace element data provide new information on the provenance of Permian-Triassic foreland basin deposits of the Gondwanide orogen that belong to the Beacon Supergroup in Antarctica. Zircon U/Th ratios primarily point to dominantly igneous parent rocks with subordinate contributions from metamorphic sources. All three sample...
Article
Full-text available
The Dhala structure in Central India has been a topic of global interest ever since the report of an ancient meteorite impact event there. Here we present an integrated study of the petrology, geochemistry, and zircon U-Pb zircon geochronology and rare earth element geochemistry from the structure along with and an analysis of the grain morphology...
Conference Paper
Plutonic lithics in volcanic rocks offer unique insight in to the magma bodies that feed eruptions. Such lithics are found in lava flows and volcanic flank domes in the Akaroa Volcanic Complex (AVC), Banks Peninsula, NZ. Goat Rock, a basaltic, flank dome, has the largest diversity of plutonic chemistries and textures in one location. A geochemical...
Article
Silicic volcanic eruptions pose considerable hazards, yet the processes leading to these eruptions remain poorly known. A missing link is knowledge of the thermal history of magma feeding such eruptions, which largely controls crystallinity and therefore eruptability. We have determined the thermal history of individual zircon crystals from an erup...
Article
Full-text available
Determining the mechanisms involved in generating large-volume eruptions (>100 km³) of silicic magma with crystallinities approaching rheological lock-up (~50 vol% crystals) remains a challenge for volcanologists. The Cenozoic Southern Rocky Mountain volcanic field, in Colorado and northernmost New Mexico, USA, produced ten such crystal-rich ignimb...
Article
The magmatic contribution into geothermal fluids in the central Taupo Volcanic Zone (TVZ), New Zealand, has been attributed to either andesitic, ‘arc-type’ fluids, or rhyolitic, ‘rift-type’ fluids to explain the compositional diversity of discharge waters. However, this model relies on outdated assumptions related to geochemical trends associated w...
Article
Full-text available
We present new U–Pb isotopic age data for detrital zircons from 16 deformed sandstones of the Ross Supergroup in north Victoria Land, Antarctica. Zircon U/Th ratios primarily point to dominantly igneous parent rocks with subordinate contributions from metamorphic sources. Comparative analysis of detrital zircon age populations indicates that inboar...
Article
Full-text available
Large silicic volcanic centers produce both small rhyolitic eruptions and catastrophic caldera-forming eruptions. Although changes in trace element and isotopic compositions within eruptions following caldera collapse have been observed at rhyolitic volcanic centers such as Yellowstone and Long Valley, much still remains unknown about the ways in w...
Article
Full-text available
Rocks from the 23 Ma Lake City caldera show diverse chemical affinities attesting to a complex magmatic system beneath the caldera. Field and geochemical data from ignimbrites and intrusions constrain magma storage and magma interactions during the formation of the caldera. Two geochemically distinct magma batches erupted during caldera formation:...
Research
Full-text available
This study investigates whether the timing of magma mixing phenomena could be related to explosivity and style of volcanic activity. Lava flow and tephra samples, derived from observed, energetically-diverse eruptions, from Pacaya and Fuego volcanoes (Guatemala), were studied, the Volcanic Explosivity Index (VEI) was used as an indicator of eruptio...
Poster
Plutonic lithics in mafic domes of Banks Peninsula provide rare insight in to the magmatic evolution of Cenozoic volcanism on the peninsula. Goat Rock, part of the Akaroa Volcanic Phase (9.4-8.0 Ma), is a basaltic trachy-andesite dome that contains <1-17 cm lithics of varying textures including prominent schlieren fabrics. Electron backscatter diff...
Conference Paper
Full-text available
Tenorio (10.673°N, 85.015°W) is a complex basaltic-andesitic volcano constituting the south-east end of the Guanacaste Volcanic Chain (NW Costa Rica) that also includes Rincon de la Vieja and Miravalles volcanoes. The Tenorio complex consists of a series of NNW-aligned structures and two twin-craters. No historical eruptions are recorded, although...
Conference Paper
Uplifts caused by magma intrusion have been observed and mapped since the pioneering work of von Buch two hundred years ago. Von Buch's "Craters of elevation theory", developed in the Auvergne and Canaries, was, unfortunately, discredited and mostly forgotten until recent work has shown that the forced folds mapped in seismic sections in sedimentar...
Article
Granitoid lithic clasts from the 0.7 ka Kaharoa eruption at the Tarawera volcano (Okataina Volcanic Complex, Taupo Volcanic Zone, New Zealand) provide insight into the processes of rhyolite formation. The plutonic lithic clasts of the Kaharoa eruption consist of (1) quartz phenocrysts, which are often grouped into clusters of two to eight quartz gr...
Article
Full-text available
the pressures at which quartz and feldspar are found to be in equilibrium with melt now preserved as glass (the quartz +1 feldspar constraint of Gualda and Ghiorso, Contrib Mineral Petrol 168:1033. doi:10.1007/s00410-014-1033-3. 2014). We use glass compositions (matrix glass and melt inclusions) from seven eruptive deposits dated between ~320 and 0...
Article
Full-text available
The central Taupo Volcanic Zone (TVZ) is an actively rifting continental arc and is well known for its exceptionally high rate of rhyolitic magma generation and frequent caldera-forming eruptions. Two end-member types of rhyolites (R1 and R2) have been previously identified based on differences in their bulk-rock chemistry and mineral assemblage wi...
Article
Full-text available
The Taupo Volcanic Zone (TVZ) is well known for its extraordin-ary rate of rhyolitic magma generation and caldera-forming erup-tions. Less is known about how large volumes of rhyolitic magma are extracted and stored prior to eruption, and the role tectonics might play in the process of melt extraction and control of caldera eruption(s). Here we pre...
Article
Full-text available
The *1,000 km 3 Carpenter Ridge Tuff (CRT), erupted at 27.55 Ma during the mid-tertiary ignimbrite flare-up in the western USA, is among the largest known strongly zoned ash-flow tuffs. It consists primarily of densely welded crystal-poor rhyolite with a pronounced, highly evolved chemical signature (high Rb/Sr, low Ba, Zr, Eu), but thickly ponded...
Article
The Okataina Volcanic Centre (OVC) is one of eight caldera systems, which form the central part of the Taupo Volcanic Zone, New Zealand. During its ~ 625 kyr volcanic history, which perhaps equates to ~ 750 kyr of magmatic history, the OVC has experienced two definite periods of caldera collapse (Matahina, ~ 322 ka, and Rotoiti, for which dates of...
Article
Full-text available
Many arc silicic igneous provinces exhibit compositional variability defined by oscillation between dry and wet rhyolites. The origins of this variability are often uncertain due to the poor constraints on the compositions of the mantle-derived inputs to the lower crustal hybridization zones. The Taupo Volcanic Zone (TVZ) in New Zealand, the most p...
Article
Full-text available
The 20 ka ~0.1 km3 Omega dacite, which erupted shortly after the 26.5 ka Oruanui super-eruption, compositionally stands out among Taupo Volcanic Zone (TVZ) magmas, which are overwhelmingly characterized by rhyolites (>90 % by volume). The previously reported presence of inherited zircons in this zircon-undersaturated magma has provided unequivocal...
Article
Full-text available
High-resolution transects across amphiboles from the layered mafic-felsic Halfmoon Pluton suggest that amphibole compositions in the outermost similar to 40 mu m of grains analyzed fluctuate in response to P-T-P-H2O conditions during the final stages of pluton emplacement and crystallization. Detailed transects (similar to 10-15 mu m point spacing)...
Article
Full-text available
Multiple eruptions of silicic magma (dacite and rhyolites) occurred over the last~3 My in the Kos-Nisyros volcanic center (eastern Aegean sea). During this period, magmas have changed from hornblende-biotite-rich units with low eruption temperatures (≤750–800°C; Kefalos and Kos dacites and rhyolites) to hotter, pyroxene-bearing units (>800–850°C; N...
Article
Hornblende, cummingtonite, and biotite δD values from rhyolitic and mingled/mixed mafic rocks from the Central Taupo Volcanic Zone were determined in an effort to characterize the isotopic composition of the dissolved fluid of magmas in this predominantly rhyolitic volcanic zone. Hand samples were obtained from pyroclastic flow, airfall, and lava f...
Article
The origin of compositional zoning in ignimbrites has long been a central question of volcanic petrology. The Carpenter Ridge Tuff (CRT) erupted ~27.5 Ma in the Southern Rocky Mountain volcanic field (SRMVF) and is one of the largest (~1,000 km3) of such zoned deposits. The source of late-erupted, dacitic fiamme found above the dominant crystal-poo...
Article
If chemical diversity in igneous rocks is dominated by crystal-liquid separation in open-system magma reservoirs, a significant number of crystal accumulation zones must be preserved in the crust and upper mantle. Such cumulates are conspicuous in mafic lithologies (MOR, layered mafic intrusions, lower crustal arc sections), but have rarely been de...