{"author": "Qi Fu", "author_email": "fuxx0033@umn.edu", "creator_user_id": "d145d0e3-de8c-416e-9681-f2390bd5c946", "id": "22fc6a3d-b599-489f-a00b-10e4e336bb71", "metadata_created": "2014-05-15T21:51:39.216962", "metadata_modified": "2014-05-15T21:54:29.672153", "name": "coupled-k-spar-dissolution-and-secondary-mineral-precipitation-in-batch-systems-200c-and-300bars", "notes": "Coupled alkali-feldspar dissolution and secondary mineral precipitation in batch systems: 1. New experiments at 200 \u00b0C and 300 bars\r\n\r\nBatch reactor experiments were conducted to assess perthitic alkali-feldspar dissolution and secondary mineral formation in an initially acidic !uid (pH=3.1) at 200 \u00b0C and 300 bars. Temporal evolution of fluid chemistry was monitored by major element analysis of in situ !uid samples. Solid reaction products were retrieved from two identical experiments terminated after 5 and 78 days. Scanning electron microscopy revealed dissolution features and signi\"cant secondary mineral coverage on feldspar surfaces. Boehmite and kaolinite were identi\"ed as secondary minerals by X-ray diffraction and transmission electron microscopy. Xray photoelectron spectroscopy analysis of alkali-feldspar surfaces before and after reaction showed a trend of increasing Al/Si ratios and decreasing K/Al ratios with reaction progress, consistent with the formation of boehmite and kaolinite. Saturation indices of feldspars and secondary minerals suggest that albite dissolution occurred throughout the experiments, while K-feldspar exceeded saturation after 216 h of reaction. Reactions proceeded slowly and full equilibrium was not achieved, the relatively high temperature of the experiments notwithstanding. Thus, time series observations indicate continuous supersaturation with respect to boehmite and kaolinite, although the extent of this decreased with reaction progress as the driving force for albite dissolution decreased. The \"rst experimental evidence of metastable co-existence of boehmite, kaolinite and alkali feldspar in the feldspar hydrolysis system is consistent with theoretical models of mineral dissolution/precipitation kinetics where the ratio of the secondary mineral precipitation rate constant to the rate constant of feldspar dissolution is well below unity. This has important implications for modeling the time-dependent evolution of feldspar dissolution and secondary mineral formation in natural systems.", "num_resources": 0, "num_tags": 8, "package_reviewed": true, "private": false, "state": "active", "title": "Coupled K-spar dissolution and secondary mineral precipitation in batch systems: 200C and 300bars", "type": "dataset", "extras": [{"key": "citation", "value": "Stanley Mordensky, Coupled K-spar dissolution and secondary mineral precipitation in batch systems: 200C and 300bars, 2014-05-15, https://edx.netl.doe.gov/dataset/coupled-k-spar-dissolution-and-secondary-mineral-precipitation-in-batch-systems-200c-and-300bars"}, {"key": "netl_product", "value": "no"}, {"key": "organization_acronym", "value": "M"}, {"key": "publication_date", "value": "2008-09-16"}], "groups": [{"description": "This group contains information relevant to unconventional resources research, with a specific focus in the Marcellus shale formation. All members of the group can add data sets and relevant information to the group. Relevant information includes links to external websites, articles, and data. To become a member of the group, just click the \"follow\" button, and please add anything that you think would be a useful resource to others interested in unconventional resources and the Marcellus shale. ", "display_name": "Unconventional Resources ", "id": "3e6be9de-3b5b-4f96-bc3d-f48c8b64cb18", "image_display_url": "https://edx.netl.doe.gov/groups/unconventional-resources/2019-01-30T10:30:36.608357.png", "name": "unconventional-resources", "title": "Unconventional Resources "}], "resources": [{"id": "a1c15f27-3989-463b-8574-4a7e7dd4ffe5", "package_id": "22fc6a3d-b599-489f-a00b-10e4e336bb71", "revision_id": "624bae9f-b471-1990-1fb9-f7544e398e2d", "url": "https://edx.netl.doe.gov/storage/f/edx/2014/05/2014-05-15T21:50:22.390Z/07d28b50-8288-423d-bff8-c42615f8ec6a/fu-et-al-2009.pdf", "format": "PDF", "description": "Chemical Geology Publication by Qi Fu, Peng Lu, Hiromi Konishi, Robert Dilmore, Huifang Xu, W.E. Seyfried Jr., and Chen Zhu", "hash": "", "position": 0, "name": "Fu et al., 2009.pdf", "resource_type": "file.upload", "mimetype": null, "mimetype_inner": null, "size": 1911409, "created": "2014-05-15T17:52:59.741384", "last_modified": "2014-05-15T17:52:59.741384", "cache_url": null, "cache_last_updated": null, "url_type": "upload", "state": "active", "license_type": "cc-by", "folder_id": "root", "owner_org": null, "recycle_removed": false, "fgdc_metadata": false, "rating": null, "categories_json": "[]", "scale": "", "typeofgep": "Not Applicable", "locations_json": "[]", "refSystem": "", "file": "", "owner": "admin", "revision_timestamp": "May 15, 2014, 21:52:59 (EST)", "intended_use_auth": false}], "tags": [{"display_name": "Fluids", "id": "bf1c1a02-9e9f-4e80-b358-dfcde13a7b92", "name": "Fluids", "state": "active", "vocabulary_id": null}, {"display_name": "Geochemistry", "id": "685da570-5449-4de6-9346-04351da14c66", "name": "Geochemistry", "state": "active", "vocabulary_id": null}, {"display_name": "Geology", "id": "b8d42824-d747-4c8e-92b6-6cf01b7b64fa", "name": "Geology", "state": "active", "vocabulary_id": null}, {"display_name": "Solids", "id": "6e05e6a8-2f2f-4faa-bdb9-84fc2037cdc3", "name": "Solids", "state": "active", "vocabulary_id": null}, {"display_name": "dissolution", "id": "82ad1435-1e26-458e-8bc6-3ef9dd63e601", "name": "dissolution", "state": "active", "vocabulary_id": null}, {"display_name": "feldspar", "id": "e2e497e3-4f57-4647-9c93-d5ababc2c87f", "name": "feldspar", "state": "active", "vocabulary_id": null}, {"display_name": "k-spar", "id": "651cc9c6-80f6-49a8-9162-70cc8949fb15", "name": "k-spar", "state": "active", "vocabulary_id": null}, {"display_name": "mineral precipitation", "id": "320119aa-6fd5-4739-80f7-33f57c282259", "name": "mineral precipitation", "state": "active", "vocabulary_id": null}], "submission_authors": []}