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Fracture length data for geothermal applications
No full textThis repository contains the supplementary material for Forstner, S.R., Corrêa, R., Wang, Q., Laubach, S.E., 2024. Fracture length data for geothermal applications. In Gill, C.E., Goffey, G., Underhill, J.R., eds., Powering the Energy Transition through Subsurface Collaboration, Geological Society of London, Energy Geoscience Conference Series, v. 1.
Supplementary material includes outcrop fracture length data measured using different mapping protocols and scales of observation.Fracture lengths govern permeability and are unknowns in geothermal assessment. Along their lengths, fracture widths vary due to growth by linkage. Under the influence of diagenesis, narrow widths seal, breaking porosity continuity and reducing open length. The largest range of widths and thus susceptibility to fill occurs where fractures are linked by narrow segments. Outcrops of a geothermal target, Cambrian Potsdam quartz arenite, contain opening-mode fractures having lengths spanning five orders of magnitude from 0.082 mm to 17.9 m. Combined lengths measured at a range of scales can be described by power laws, but at a given image resolution, lengths are best fit by exponential functions. Owing to preferential sealing of small fractures, open fractures follow exponential functions, but values depend on rules for designating fractures as continuous. En échelon segments, offset 10 mm, are connected by narrow fractures or microfractures (hard linked) not evident on outcrop 1-m-elevation LiDAR or 30-m-height drone images. A rule that identifies where narrow but probably connected segments yields lengths that are meaningful for flow simulation. Depending on diagenesis, continuity rules can halve or double average and maximum length values. Length values from outcrop for geothermal applications should be adjusted based on wellsite-specific diagenesis information.Supported by grant DE-SC0022968 from Chemical Sciences, Geosciences and Biosciences Division, Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy (DOE).Bureau of Economic Geolog
Stephanie Mathson interviews poet and author Judith Kerman
No full textPoet and author Judith Kerman talks about her experience as a Fulbright scholar in the Dominican Republic, her work translating poems by Cuban poet Dulce Mar\ueda Loynaz, learning Spanish, translating poems from Spanish, and her book "Retrofitting Blade Runner". Kerman is interviewed by Stephanie Mathson of the Michigan State University Libraries. Part of the MSU Libraries' Michigan Writers Series
Stephanie Mathson interviews poet and author Jack Ridl
No full textPoet and author Jack Ridl explains how he began writing, the writer series at Hope College, his coach poems, his chapbook "Against elegies," how working and living in Michigan shapes his work, and works in progress. Ridl is interviewed by Stephanie Mathson of the Michigan State University Libraries. Part of the MSU Libraries' Michigan Writers Series
Stephanie Mathson interviews poet and author Josie Kearns
No full textPoet and author Josie Kearns, professor of creative writing and literature at the University of Michigan, talks about teaching and writing, natural scenery in Michigan, her editorship of the book "New Poems From the Third Coast", her book "New Numbers", and other works in process. Kearns is interviewed by Stephanie Mathson from the Michigan State University Libraries for the MSU Libraries' Michigan Writers Series
Kara Gust interviews author and bioregionalist Stephanie Mills
No full textAuthor and ecologist Stephanie Mills talks about how she started writing and publishing, writing on nature and the environment, the challenges of being a writer, the influence of Michigan on her work, bio-regionalism, and a new book she is working on. Mills is interviewed by Michigan State University Librarian Kara Gust for the Michigan State University Libraries' Michigan Writers Series
Making a market for Miscanthus: Can new contract designs solve the biofuel investment hold-up problem?
No full textWe present designs for optimal contracts to solve the investment hold-up problem for perennial crops for the biofuel industry. A fixed-price contract is ex-ante efficient but renegotiation-proof for a limited range of discount parameters. A perfectly- indexed contract is both renegotiation-proof and ex-post efficient. Provided long-run land prices are stationary, the expected cost for both contracts converges to the long-run expected price of land for a risk-neutral farmer.Biofuels, Miscanthus, contract theory, industrial organization, renegotiation-proof contract, Marketing,
Author and bioregionalist Stephanie Mills reads her selected works at the Michigan Writers Series
No full textAuthor and ecologist Stephanie Mills reads from her first book "Whatever happened to ecology?" and from "Tough little beauties," then answers questions from the audience. The event is convened by Peter Berg, head of Michigan State University Libraries' Special Collections. Part of the Michigan State University Libraries' Michigan Writers Series. Held in the Main Library
Stephanie Mathson interviews essayist and memoirist Robert Root
No full textEssayist and memoirist Robert Root, professor of English at Central Michigan University, talks about his book "Recovering Ruth" and the genealogical research research in his work and his role as both a university professor and an author. He also shares his views on creative nonfiction, Michigan as a source of inspiration, and works in progress. Root is interviewed by Stephanie Mathson of the Michigan State University Libraries for the MSU Libraries' Michigan Writers Series
Poet and author Josie Kearns reads her selected works at the Michigan Writers Series
No full textPoet and author Josie Kearns, professor of creative writing and literature at the University of Michigan, reads selected poems and answers questions from the audience. The event is convened by Stephanie Mathson from the Michigan State University Libraries. Part of the MSU Libraries' Michigan Writers Series. Held at the Main Library
Ep. #005 - Stephanie LeMenager
No full textThis recording and transcript form part of a collection of podcasts conducted by the Cultures of Energy at Rice University. Cultures of Energy brings writers, artists and scholars together to talk, think and feel their way into the Anthropocene. We cover serious issues like climate change, species extinction and energy transition. But we also try to confront seemingly huge and insurmountable problems with insight, creativity and laughter.Cymene and Dominic embrace amateurism as they have trouble pronouncing names on this week’s podcast. Then (8:28) they talk to Stephanie LeMenager, Professor of English and Environmental Studies at the University of Oregon, author of Living Oil: Petroleum Culture in the American Century (Oxford University Press, 2014) and founding co-editor of the journal, Resilience. The conversation explores how we live with oil and how oil lives in us, speculative fiction, teaching climate change, and how the arts and humanities can chart new ways of being together
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