# 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-ihat98-metals-noaa.txt
#   Data_Download_Description: NOAA Template File; Ihatub Reef Sample 1998 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 ihat98 metals
#   First_Year: 1995
#   Last_Year: 1998
#   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)
#
## 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,
## cu_h2o2	copper,Porites lobata,,microgram per gram,,corals and sclerosponges,,,N,H2O2 treated
## 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	cu_h2o2	fe	fe_stdev	mn	mn_stdev	zn	zn_stdev
7400-1	1.5	1.156849315		0.754249767	2.777054795		2.008561644		0.930821918	
7400-2	4	1.442729812		1.842520776	2.332712518		0.917919383		1.734069443	
7400-3	7	1.449460362	0.305683671	1.455991815	3.257190057	2.392992526	0.865456143	0.005373838	2.36954367	0.356793778
7400-4_1	10	1.513919071	0.071736308	0.896796267	9.374956326	7.688088901	0.799858768	0.059511398	2.183896052	0.230878433
7400-5_1	12.5	1.787583872	0.077406044	1.031129881	2.476413789	0.671646479	0.741606785	0.007592408	1.271677757	0.185790507
7400-6_1	15	1.345531828	0.003345924	1.104494799	11.46188347	6.12582627	0.905692455	0.031330862	1.148254775	0.065517288
7400-7_1!	17.5	1.32595213	0.169102815	0.993433575	2.693197727	0.083857068	2.129280822	0.120719178	0.974751618	0.0439297
7400-8	20	1.501123099	0.093256437	0.739001664	6.264294552	0.88564125	1.908623687	0.082822372	1.958322316	0.065377148
7400-9	22	1.382391957		0.820652287	11.31257418		3.248621099		1.761502479	
7400-10_1	25	2.415625807	0.259131474	1.282375919	6.016837786	0.212630666	1.790305669	0.044350977	2.094312081	0.086917693
7400-11_1	28	4.046550517	0.082859141	2.339086294	3.909060183	0.913178849	0.837508736	0.019147845	2.480898718	0.090581017
7400-12	31	3.229194014		0.804887628	5.048569178		0.860462064		1.998556051	
7400-13	33	2.67871959	0.161646718	0.812873422	4.887133864	1.197431604	0.712226413	0.011979574	2.253360391	0.046930005
7400-14	36	1.67201884		1.168911133	0.903446799		0.941982445		3.737957611	
7400-15	38	1.253096438		0.633949679	4.448620483		1.247971299		3.259588281	
7400-16_1	41	1.202055489	0.014342447	0.519217312	4.685381612	2.05920689	0.992890161	0.07818509	2.182575516	0.500825326
7400-17_1	44	0.597615195	0.015090923	0.534272878	1.0679122	0.086075756	0.568309314	0.004219354	1.487520941	0.009089087
7400-18_1	47	0.505533534	0.035348643	0.785360492	1.12970226	0.508911272	0.49455622	0.02437133	1.510041486	0.120912353
7400-19_1	50	0.634191723	0.022913884	1.191793961	0.760555405	0.021311598	0.609539018	0.000630473	1.503493705	0.107979568