# Marinduque Island, Philippines Coral Heavy Metals and Oxygen Isotope Data
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#                World Data Service for Paleoclimatology, Boulder 
#                                  and 
#                     NOAA Paleoclimatology Program 
#             National Centers for Environmental Information (NCEI)
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# Template Version 4.0
# Encoding: UTF-8
# NOTE: Please cite original publication, NOAA Landing Page URL, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, study title, NOAA Landing Page URL, and date accessed. 
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# Description/Documentation lines begin with #
# Data lines have no #
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# NOAA_Landing_Page:  https://www.ncei.noaa.gov/access/paleo-search/study/1893
#   Landing_Page_Description: NOAA Landing Page of this file's parent study, which includes all study metadata.
#
# Study_Level_JSON_Metadata: https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/json/noaa-coral-1893.json
#   Study_Level_JSON_Description: JSON metadata of this data file's parent study, which includes all study metadata.
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# Data_Type: Corals and Sclerosponges
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# Dataset_DOI: 10.25921/5844-dk90
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# Science_Keywords:
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# Resource_Links
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# Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/coral/west_pacific/marinduque2004-ihat99-metals-noaa.txt
#   Data_Download_Description: NOAA Template File; Ihatub Reef Sample 1999 Heavy Metal Data
#
# Related_Online_Resource: https://www.ncei.noaa.gov/pub/data/paleo/coral/west_pacific/marinduque2004-supp.txt
#   Related_Online_Description: Supplemental File; Raw Density and Oxygen Isotope Data Used for Chronology
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# Contribution_Date
#   Date: 2003-07-01
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# File_Last_Modified_Date
#   Date: 2025-07-15
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# Title
#   Study_Name: Marinduque Island, Philippines Coral Heavy Metals and Oxygen Isotope Data
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# Investigators
#   Investigators: David, C.P.
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# Description_Notes_and_Keywords
#   Description: Marinduque Island, Philippines Coral Heavy Metals and Oxygen Isotope Data. All samples are from the Island of Marinduque in the Philippines (13deg 26'N  121deg 49' E).
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# Publication 
#   Authors: David, C.P.
#   Published_Date_or_Year: 2003
#   Published_Title: Heavy metal concentrations in growth bands of corals: a record of mine tailings input through time (Marinduque Island, Philippines)
#   Journal_Name: Marine Pollution Bulletin
#   Volume: 46
#   Edition: 
#   Issue: 2
#   Pages: 187-196
#   Report_Number: 
#   DOI: 10.1016/S0025-326X(02)00315-6
#   Online_Resource: 
#   Full_Citation:
#   Abstract: The impact of copper mining along the western coast of Marinduque Island was investigated. Historic input of mine tailings in the coastal region was traced through variations in heavy metal concentrations in Porites growth bands. Five samples were collected from three reefs showing different modes and extent of exposure to mine tailings. Baseline metal concentrations in Porites were established using a coral from a reef that is least exposed to contamination. The lowest mean values of Cu (0.7 μg/g), Mn (0.8 μg/g), and Zn (1.0 μg/g) were calculated from annual skeletal bands representing five years of growth. Conversely, a sample from a reef adjacent to an old tailings stockpile displayed consistently elevated metal values in its growth bands. Mean Cu, Mn, and Zn values for this coral are 3.1, 1.0 and 1.8 μg/g, respectively. Corals from the Ihatub reef showed a distinct metal concentration peak in their 1996 growth ring. These peaks coincide with a documented release of mine tailings in the Ihatub area during that year. Other metal peaks observed in coral samples correlate with years of high precipitation which may have resulted in increased sediment transport in the region. The metals are presumed to be mostly bound to the aragonite lattice of the coral skeleton, however, contribution from incorporated detrital materials to the observed metal signal (mainly of Fe) could not be easily discounted.
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# Funding_Agency 
#   Funding_Agency_Name: Geological Society of America
#   Grant: student grant
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# Funding_Agency 
#   Funding_Agency_Name: Stanford University
#   Grant: McGee grant
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# Funding_Agency 
#   Funding_Agency_Name: Department of Science and Technology of the Philippine Government
#   Grant: 
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# Site_Information 
#   Site_Name: Marinduque Island
#   Location: Philippines
#   Northernmost_Latitude: 13.43
#   Southernmost_Latitude: 13.43
#   Easternmost_Longitude: 121.82
#   Westernmost_Longitude: 121.82
#   Elevation_m: 
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# Data_Collection  
#   Collection_Name: david2003 ihat99 metals
#   First_Year: 1994
#   Last_Year: 1999
#   Time_Unit: CE
#   Core_Length_m: 
#   Parameter_Keywords: trace metals
#   Notes:
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# Chronology_Information
#   Chronology: 
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# Variables  
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# PaST_Thesaurus_Download_Resource:  https://www.ncei.noaa.gov/access/paleo-search/skos/past-thesaurus.rdf
#   PaST_Thesaurus_Download_Description: Paleoenvironmental Standard Terms (PaST) Thesaurus terms, definitions, and relationships in SKOS format.
#
# Data variables follow that are preceded by "##" in columns one and two.
# Variables list, one per line, shortname-tab-var components: what, material, error, units, seasonality, data type, detail, method, C or N for Character or Numeric data)
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## samp_id	sample identification,,,,,corals and sclerosponges,,,C,
## depth_mm	depth,,,millimeter,,corals and sclerosponges,,,N,
## cu	copper,Porites lobata,,microgram per gram,,corals and sclerosponges,,,N,
## cu_stdev	copper,Porites lobata,one standard deviation,microgram per gram,,corals and sclerosponges,,,N,
## fe	iron,Porites lobata,,microgram per gram,,corals and sclerosponges,,,N,
## fe_stdev	iron,Porites lobata,one standard deviation,microgram per gram,,corals and sclerosponges,,,N,
## mn	manganese,Porites lobata,,microgram per gram,,corals and sclerosponges,,,N,
## mn_stdev	manganese,Porites lobata,one standard deviation,microgram per gram,,corals and sclerosponges,,,N,
## zn	zinc,Porites lobata,,microgram per gram,,corals and sclerosponges,,,N,
## zn_stdev	zinc,Porites lobata,one standard deviation,microgram per gram,,corals and sclerosponges,,,N,
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# Data:
# Data lines follow (have no #)
# Data line format - tab-delimited text, variable short name as header
# Missing_Values:
samp_id	depth_mm	cu	cu_stdev	fe	fe_stdev	mn	mn_stdev	zn	zn_stdev
ihat99-1	1	0.331202789		3.268448576		0.862870424		2.57989541	
ihat99-2	3.5	0.123240401		0.484745577		0.742728816		0.911978967	
ihat99-3	6	1.223495993		2.605255149		0.730445369		0.660444354	
ihat99-4	11	0.565778423		1.037642208		0.522257005		0.962052378	
ihat99-5	13	0.464853362		1.504289419		0.672341557		1.06936224	
ihat99-6	15.5	0.774848593	0	0.467581047	0	0.494299964	0	1.08478803	
ihat99-7_1	18	0.341485913	0.072783362	1.268957952	0.895333453	0.451211473	0.016169248	0.791321349	0.085017502
ihat99-8	20.5	0.458828349		0.802949611		0.700532569		1.638672675	
ihat99-9	23								
ihat99-10	26	0.332666788		0.203599346		0.62897655		0.714415561	
ihat99-11_1	28.5	0.365722956	0.100741301	1.665376987	0.821512331	0.50116465	0.004338815	0.950376603	0.174776271
ihat99-12_1	31	0.580767296	0.038672841	2.636163092	0.177025515	1.086819789	0.014951206	1.012317446	0.270633668
ihat99-13	34	0.510954742		0.477370862		0.801215417		0.49656165	
ihat99-14	37	0.859675037		0.274741507		0.841949778		1.680945347	
ihat99-15_1	39	0.745504977	0.019852526	1.565815899	0.23399314	0.847588114	0.011737157	0.942902033	0.021451882
ihat99-16	41	1.185944363		9.294289898		0.679355783		1.660322108	
ihat99-17	43	2.818330013		6.692628147		0.586850208		1.456257924	
ihat99-18_1	46	0.845847828	0.184959896	4.806282879	2.390736461	0.821514162	0.160810594	1.586235634	0.378071615
ihat99-19	49.5	0.74	0.15	2.700865498	0.170671026	0.769465979	0.191311279	1.380784308	0.688430618
ihat99-20	52	2.315325242	0.523896671	1.986656837	0.836200306	0.832368571	0.256560535	1.955487186	0.943222204
ihat99-21	55.5	1.086025545	0.129485831	3.804524102	1.799837429	0.557815189	0.065875225	1.204626525	0.223539919
ihat99-22	58	1.319512889	0.330351876	3.082329334	1.004630785	0.741691399	0.247469614	1.422124669	0.296884364