The Cretaceous Alkaline Dyke Swarm in the Central Segment of the Asunción Rift, Eastern Paraguay: Its Regional Distribution, Mechanism of Emplacement, and Tectonic Significance

Table 1

Additional information about the alkaline dykes that occur in the central segment of the Asunción Rift.

Field number	Latitude/Longitude	Dip direction	Width (m)	Rock	Evolutive trend	References	Chronology
001	25°40′53′′ S/56°56′36′′ W	355/89	1.30	Trachybasalt	AB-T	[8, 21, 36]
002	25°41′31′′ S/56°56′34′′ W	342/89	1.40	Tephriphonolite	B-P	This paper
003	25°41′34′′ S/56°56′32′′ W	150/89	0.40	Phonolite	B-P	This paper
004	25°41′08′′ S/56°56′41′′ W	320/89	1.00	Tephriphonolite	B-P	[8, 21, 36]
005	25°41′34′′ S/56°56′55′′ W	130/89	0.70	Phonolite	B-P	This paper
006	25°41′40′′ S/56°56′58′′ W	145/89	0.90	Phonotephrite	B-P	This paper
007	25°41′58′′ S/56°56′18′′ W	170/89	1.70	Phonolite	B-P	This paper
008	25°41′50′′ S/56°56′51′′ W	325/89	1.45	Tephrite	B-P	This paper
009	25°42′14′′ S/56°56′48′′ W	310/89	1.30	Phonotephrite	AB-T	This paper
010	25°41′45′′ S/56°56′19′′ W	305/89	0.45	Trachybasalt	AB-T	This paper	10 is cut by 11
011	25°41′55′′ S/56°56′19′′ W	130/89	0.80	Tephriphonolite	B-P	This paper
012	25°41′58′′ S/56°56′01′′ W	320/89	0.70	Trachyandesite	AB-T	[8, 21, 36]
013	25°42′11′′ S/56°57′04′′ W	092/89	0.60	Peralk. Phon.	B-P	This paper
014	25°42′25′′ S/56°57′06′′ W	290/89	1.00	Trachyte	AB-T	[8, 21, 36]
015	25°42′39′′ S/56°57′09′′ W	075/89	0.50	Peralk. Phonol.	B-P	[8, 21, 36]
016	25°42′56′′ S/56°57′11′′ W	042/89	1.20	Tephrite	B-P	[8, 21, 36]
017	25°42′58′′ S/56°57′19′′ W	287/89	0.80	Alkali basalt	AB-T	This paper
018	25°42′58′′ S/56°57′19′′ W	020/89	1.00	Trachyandesite	AB-T	This paper
019	25°43′20′′ S/56°57′15′′ W	075/89	0.50	Phonolite	B-P	This paper
020	25°45′57′′ S/56°57′27′′ W	065/89	0.90	Phonolite	B-P	This paper
021	25°45′59′′ S/56°57′30′′ W	325/89	0.35	Trachybasalt	B-P	[8, 21, 36]
022	25°45′59′′ S/56°57′30′′ W	340/89	0.20	Phonotephrite	B-P	This paper
023	25°44′29′′ S/56°57′36′′ W	055/89	0.70	Tephrite	B-P	This paper
024	25°44′29′′ S/56°57′36′′ W	045/89	0.80	Phonotephrite	B-P	This paper
025	25°39′45′′ S/56°58′11′ W	140/89	1.30	Tephriphonolite	B-P	This paper	25 is cut by 26
026	25°39′50′′ S/56°58′13′ W	310/89	0.25	Phonolite	B-P	[8, 21, 36]
027	25°39′50′′ S/56°57′40′ W	110/89	0.20	Trachyandesite	AB-T	[8, 21, 36]
028	25°40′06′′ S/56°57′44′′ W	130/89	0.40	Tephriphonolite	B-P	This paper
029	25°40′05′′ S/56°57′41′′ W	110/89	0.60	Trachybasalt	B-P	This paper
030	25°40′09′′ S/56°57′30′′ W	310/89	0.25	Tephrite	B-P	This paper
031	25°40′10′′ S/56°57′37′′ W	165/89	0.35	Peralk. Phon.	B-P	[8, 21, 36]
032	25°40′17′′ S/56°57′42′′ W	118/89	2.40	Trachy	AB-T	[8, 21, 36]	32 is cut by 31
033	25°40′27′′ S/56°57′40′′ W	140/89	0.35	Phonotephrite	B-P	[8, 21, 36]
034	25°40′30′′ S/56°57′46′′ W	330/89	1.20	Tephriphonolite	B-P	This paper
035	25°40′32′′ S/56°57′43′′ W	130/89	0.25	Tephrite	B-P	This paper
036	25°40′35′′ S/56°57′40′′ W	120/89	0.40	Trachyte	AB-T	This paper
037	25°40′37′′ S/56°57′39′′ W	140/89	0.15	Tephriphonolite	B-P	This paper
038	25°40′39′′ S/56°57′43′′ W	290/89	1.00	Trachyandesite	AB-T	This paper
039	25°40′40′′ S/56°57′35′′ W	310/89	0.35	Phonotephrite	B-T	This paper
040	25°40′41′′ S/56°57′30′′ W	165/89	0.40	Phonolite	B-P	[8, 21, 36]
041	25°40′40′′ S/56°57′50′′ W	310/89	0.15	Phonotephrite	B-P	[8, 21, 36]
042	25°40′42′′ S/56°57′55′′ W	290/89	0.25	Trachyandesite	AB-T	This paper
043	25°40′53′′ S/56°57′32′′ W	330/89	0.40	Tephriphonolite	B-P	This paper
044	25°40′56′′ S/56°57′30′′ W	130/89	0.20	Tephriphonolite	B-P	This paper	44 is cut by 45
045	25°40′56′′ S/56°57′30′′ W	320/89	1.50	Peralk. Phon.	B-P	This paper
046	25°41′02′′ S/56°57′40′′ W	330/89	0.35	Tephrite	B-P	This paper
047	25°41′09′′ S/56°57′30′′ W	320/89	0.15	Phonolite	B-P	This paper
048	25°41′08′′ S/56°57′47′′ W	160/89	0.40	Phonotephrite	B-P	This paper
049	25°41′12′′ S/56°57′52′′ W	145/89	2.00	Tephrite	B-P	[8, 21, 36]
050	25°41′17′′ S/56°57′42′′ W	300/89	0.45	Trachybasalt	AB-T	This paper
051	25°42′23′′ S/56°58′10′′ W	310/89	0.35	Peralk. Phon.	B-T	[8, 21, 36]
052	25°42′26′′ S/56°58′19′′ W	140/89	0.90	Tephriphonolite	B-P	This paper
053	25°41′20′′ S/56°58′25′′ W	070/89	2.30	Phonolite	B-T	[8, 21, 36]
054	25°39′41′′ S/56°58′35′′ W	130/89	0.45	Phonotephrite	B-P	[8, 21, 36]
055	25°39′42′′ S/56°58′30′′ W	165/89	0.70	Peralk. Phon.	B-P	[8, 21, 36]
056	25°40′17′′ S/56°57′31′′ W	130/89	0.35	Trachyandesite	AB-T	This paper
057	25°39′55′′ S/56°58′11′′ W	150/89	1.00	Tephrite	B-P	[8, 21, 36]
058	25°39′35′′ S/56°58′36′′ W	657/89	1.20	Tephriphonolite	B-P	[8, 21, 36]
059	25°40′37′′ S/56°58′34′′ W	285/89	0.60	Trachyte	AB-T	[8, 21, 36]
060	25°40′43′′ S/56°58′42′′ W	050/89	0.80	Trachy	AB-T	[8, 21, 36]
061	25°41′10′′ S/56°58′39′′ W	335/89	1.20	Phonotephrite	B-P	[8, 21, 36]
062	25°41′10′′ S/56°58′39′′ W	135/89	1.00	Peralk. Phon.	B-P	[8, 21, 36]
063	25°41′24′′ S/56°59′09′′ W	285/89	0.70	Trachyandesite	AB-T	[8, 21, 36]	63 is cut by 62
064	25°41′49′′ S/56°59′57′′ W	070/89	1.40	Phonolite	B-P	[8, 21, 36]
065	25°41′24′′ S/56°58′36′′ W	060/89	3.50	Tephrite	B-P	[8, 21, 36]
066	25°42′48′′ S/56°58′59′′ W	050/89	2.20	Tephrite	B-P	[8, 21, 36]
067	25°42′50′′ S/56°58′56′′ W	315/89	0.20	Phonolite	B-P	This paper
068	25°42′53′′ S/56°58′35′′ W	320/89	0.15	Trachyte	AB-T	This paper
069	25°42′55′′ S/56°58′45′′ W	330/89	0.40	Peralk. Phon.	B-P	[8, 21, 36]
070	25°42′43′′ S/56°58′53′′ W	230/89	1.00	Tephriphonolite	B-P	[8, 21, 36]
071	25°41′22′′ S/56°55′20′′ W	260/89	4.00	Phonotephrite	B-P	This paper
072	25°41′25′′ S/56°55′15′′ W	130/89	0.25	Peralk. Phon.	B-T	This paper
073	25°41′36′′ S/56°55′10′′ W	140/89	0.15	Tephrite	B-P	This paper
074	25°41′39′′ S/56°55′04′′ W	125/89	3.50	Phonolite	B-P	This paper
075	25°41′42′′ S/56°55′10′′ W	330/89	0.20	Tephriphonolite	B-P	[8, 21, 36]
076	25°42′01′′ S/56°54′59′′ W	340/89	0.35	Phonolite	B-P	[8, 21, 36]
077	25°42′01′′ S/56°54′59′′ W	110/89	1.40	Trachyte	AB-T	This paper
078	25°42′06′′ S/56°54′53′′ W	330/89	0.30	Phonolite	B-P	This paper
079	25°42′37′′ S/56°54′47′′ W	150/89	0.40	Tephriphonolite	B-P	This paper
080	25°42′43′′ S/56°55′03′′ W	335/89	3.20	Tephrite	B-P	This paper
081	25°42′06′′ S/56°52′26′′ W	075/89	2.30	Peralk. Phon.	B-P	This paper
082	25°42′18′′ S/56°56′03′′ W	305/89	0.25	Trachyte	AB-T	[8, 21, 36]
083	25°42′20′′ S/56°52′35′′ W	230/89	0.40	Tephriphonolite	B-P	[8, 21, 36]
084	25°42′21′′ S/56°52′37′′ W	050/89	5.00	Tephriphonolite	B-P	This paper
085	25°42′40′′ S/56°53′29′′ W	140/89	0.35	Tephrite	B-P	This paper
086	25°42′57′′ S/56°53′39′′ W	310/89	0.15	Tephrite	B-P	This paper
087	25°43′02′′ S/56°53′19′′ W	065/89	1.50	Phonolite	B-P	This paper
088	25°42′22′′ S/56°53′35′′ W	300/89	0.30	Tephriphonolite	B-P	This paper
089	25°42′25′′ S/56°53′33′′ W	345/89	0.25	Phonolite	B-P	This paper
090	25°42′29′′ S/56°53′39′′ W	230/89	10.0	Trachybasalt	AB-T	This paper	90 is cut by 91
091	25°42′29′′ S/56°54′39′′ W	330/89	0.35	Tephrite	B-P	This paper
092	25°42′40′′ S/56°54′12′′ W	150/89	0.25	Phonolite	B-T	This paper
093	25°43′02′′ S/56°54′20′′ W	110/89	2.20	Trachyandesite	AB-T	This paper
094	25°43′02′′ S/56°54′33′′ W	140/89	0.15	Phonotephrite	B-P	This paper
095	25°43′004′′ S/56°54′32′′ W	320/89	0.35	Tephriphonolite	B-P	[8, 21, 36]
096	25°43′04′′ S/56°54′36′′ W	320/89	3.00	Phonotephrite	B-P	This paper
097	25°43′25′′ S/56°56′40′′ W	300/89	0.20	Tephrite	B-P	[8, 21, 36]
098	25°43′30′′ S/56°56′41′′ W	310/89	0.35	Tephrite	B-P	[8, 21, 36]
099	25°43′37′′ S/56°56′43′′ W	250/89	0.80	Peralk. Phon.	B-P	This paper
100	25°43′39′′ S/56°56′40′′ W	130/89	0.35	Phonotephrite	B-P	This paper
101	25°43′41′′ S/56°56′37′′ W	140/89	0.20	Phonotephrite	B-P	This paper
102	25°43′59′′ S/56°54′29′′ W	300/89	0.60	Trachyphonolite	AB-T	This paper
103	25°44′02′′ S/56°54′35′′ W	125/89	1.25	Peralk. Phon.	B-P	[8, 21, 36]
104	25°43′13′′ S/56°54′44′′ W	125/89	0.40	Trachyphonolite	AB-T	[8, 21, 36]
105	25°44′13′′ S/56°54′24′′ W	120/89	0.25	Tephriphonolite	B-P	[8, 21, 36]
106	25°44′13′′ S/56°54′24′′ W	155/89	2.00	Tephrite	B-P	This paper
107	25°44′17′′ S/56°54′36′′ W	125/89	1.80	Trachyte	AB-T	This paper
108	25°44′35′′ S/56°55′07′′ W	345/89	0.70	Tephriphonolite	B-P	This paper
109	25°44′40′′ S/56°55′10′′ W	160/89	1.00	Tephrite	B-P	This paper	109 is cut by 110
110	25°44′40′′ S/56°55′10′′ W	345/89	3.20	Phonolite	B-P	This paper
111	25°46′26′′ S/56°56′17′′ W	295/89	1.60	Tephriphonolite	B-P	This paper
112	25°47′06′′ S/56°56′14′′ W	170/89	2.60	Peralk. Phon.	B-P	This paper
113	25°47′39′′ S/56°56′18′′ W	305/89	3.20	Phonotephrite	B-P	This paper
114	25°47′42′′ S/56°56′16′′ W	345/89	0.55	Phonolite	B-P	This paper
115	25°47′44′′ S/56°56′18′′ W	130/89	8.00	Trachyphonolite	AB-T	This paper
116	25°47′46′′ S/56°56′20′′ W	155/89	0.40	Phonolite	B-P	[8, 21, 36]
117	25°47′46′′ S/56°56′19′′ W	330/89	0.25	Tephriphonolite	B-P	[8, 21, 36]
118	25°47′46′′ S/56°56′19′′ W	150/89	2.50	Phonolite	B-P	This paper
119	25°48′04′′ S/56°56′22′′ W	315/89	1.70	Tephriphonolite	B-P	This paper
120	25°48′27′′ S/56°56′0/5′′ W	125/89	0.35	Trachyandesite	AB-T	[8, 21, 36]
121	25°50′43′′ S/56°56′22′′ W	155/89	1.20	Phonolite	B-P	This paper
122	25°48′45′′ S/56°56′30′′ W	340/89	2.70	Phonolite	B-T	This paper
123	25°51′28′′ S/56°55′37′′ W	160/89	0.80	Tephrite	B-P	This paper
124	25°47′37′′ S/56°57′05′′ W	160/89	0.60	Phonolite	B-P	This paper
125	25°47′45′′ S/56°57′06′′ W	125/89	2.40	Tephriphonolite	B-P	This paper
126	25°47′45′′ S/56°57′04′′ W	320/89	1.80	Trachyandesite	AB-T	This paper
127	25°47′57′′ S/56°57′10′′ W	330/89	1.00	Phonotephrite	B-P	This paper
128	25°47′59′′ S/56°57′12′′ W	310/89	0.20	Tephrite	B-P	This paper
129	25°48′43′′ S/56°57′091′′ W	315/89	0.35	Tephrite	B-P	This paper
130	25°48′45′′ S/56°57′11′′ W	340/89	2.70	Peralk. Phon.	B-P	This paper
131	25°48′45′′ S/56°57′11′′ W	300/89	0.25	Trachyphonolite	AB-T	[8, 21, 36]
132	25°48′43′′ S/56°57′09′′ W	150/89	0.35	Peralk. Phon.	B-P	This paper
133	25°49′53′′ S/56°57′43′′ W	330/89	0.20	Peralk. Phon.	B-P	This paper
134	25°49′53′′ S/56°57′43′′ W	030/89	0.70	Trachyte	AB-T	This paper	134 is cut by 133
135	25°49′53′′ S/56°57′43′′ W	150/89	0.35	Phonotephrite	B-T	[8, 21, 36]
136	25°49′55′′ S/56°57′40′′ W	070/89	0.20	Phonolite	B-P	This paper
137	25°47′55′′ S/56°57′53′′ W	140/89	0.40	Tephrite	B-P	This paper
138	25°48′00′′ S/56°57′55′′ W	300/89	1.30	Trachyandesite	AB-T	This paper
139	25°47′45′′ S/56°57′29′′ W	165/89	3.00	Tephriphonolite	B-P	This paper
140	25°47′25′′ S/56°57′39′′ W	135/89	0.70	Trachyphonolite	AB-T	This paper
141	25°47′30′′ S/56°57′20′′ W	155/89	0.35	Peralk. Phon.	B-P	This paper
142	25°47′32′′ S/56°57′30′′ W	31/89	0.35	Trachyandesite	AB-T	[8, 21, 36]
143	25°47′32′′ S/56°57′28′′ W	165/89	1.50	Phonolite	B-P	This paper
144	25°47′30′′ S/56°57′25′′ W	335/89	0.25	Tephrite	B-P	This paper
145	25°47′27′′ S/56°57′26′′ W	115/89	1.60	Trachyte	AB-T	This paper
146	25°47′27′′ S/56°57′26′′ W	120/89	0.35	Tephriphonolite	B-P	[8, 21, 36]
147	25°47′19′′ S/56°57′35′′ W	160/89	0.35	Phonolite	AB-T	This paper
148	25°47′29′′ S/56°57′30′′ W	305/89	0.25	Trachyphonolite	AB-T	This paper
149	25°47′30′′ S/56°57′25′′ W	330/89	0.40	Tephrite	B-P	[8, 21, 36]
150	25°47′35′′ S/56°57′23′′ W	345/89	2.30	Phonolite	B-P	This paper
151	25°43′37′′ S/56°53′19′′ W	240/89	0.80	Phonolite	B-P	This paper
152	25°44′26′′ S/56°51′17′′ W	135/89	10.0	Phonolite	B-P	[8, 21, 36]
153	25°44′28′′ S/56°51′30′′ W	295/89	0.80	Trachyte	AB-T	[8, 21, 36]
154	25°44′30′′ S/56°51′25′′ W	330/89	0.45	Peralk. Phon.	B-P	This paper
155	25°44′07′′ S/56°52′08′′ W	120/89	3.00	Phonotephrite	B-P	This paper
156	25°44′09′′ S/56°52′10′′ W	310/89	2.70	Tephriphonolite	B-P	This paper
157	25°44′11′′ S/56°52′12′′ W	335/89	1.20	Peralk. Phon.	B-P	This paper
158	25°44′09′′ S/56°52′23′′ W	340/89	0.30	Peralk. Phon.	B-P	[8, 21, 36]
159	25°44′10′′ S/56°52′20′′ W	330/89	0.20	Phonotephrite	B-P	[8, 21, 36]
160	25°44′15′′ S/56°52′15′′ W	115/89	0.45	Trachyphonolite	AB-T	[8, 21, 36]
161	25°44′16′′ S/56°52′18′′ W	130/89	0.20	Phonotephrite	B-P	[8, 21, 36]
162	25°44′17′′ S/56°52′20′′ W	155/89	0.35	Phonolite	B-P	This paper
163	25°45′17′′ S/56°52′05′′ W	320/89	0.20	Tephrite	B-P	This paper
164	25°46′01′′ S/56°52′18′′ W	320/89	0.60	Phonolite	B-P	This paper
165	25°46′01′′ S/56°52′18′′ W	115/89	1.00	Tephrite	B-P	This paper	165 is cut by 164
166	25°46′14′′ S/56°52′25′′ W	125/89	2.30	Tephrite	B-P	This paper
167	25°46′18′′ S/56°52′19′′ W	330/89	0.90	Peralk. Phon.	B-P	This paper
168	25°46′20′′ S/56°52′23′′ W	320/89	0.40	Tephrite	B-P	[8, 21, 36]
169	25°46′23′′ S/56°52′36′′ W	120/89	0.30	Trachyte	AB-T	[8, 21, 36]
170	25°46′25′′ S/56°52′34′′ W	340/89	0.40	Phonolite	B-P	[8, 21, 36]
171	25°46′55′′ S/56°52′50′′ W	320/89	0.25	Tephriphonolite	B-P	[8, 21, 36]
172	25°46′59′′ S/56°52′53′′ W	165/89	1.30	Phonolite	AB-T	This paper
173	25°47′05′′ S/56°52′50′′ W	340/89	0.35	Phonotephrite	B-P	This paper
174	25°46′47′′ S/56°53′16′′ W	295/89	2.40	Trachyphonolite	AB-T	This paper
175	25°47′04′′ S/56°53′03′′ W	145/89	1.50	Tephriphonolite	B-P	This paper
176	25°47′10′′ S/56°53′09′′ W	170/89	0.20	Peralk. Phon.	B-P	This paper
178	25°47′14′′ S/56°54′01′′ W	125/89	0.30	Trachyte	AB-T	[8, 21, 36]
179	25°46′47′′ S/56°53′20′′ W	330/89	0.45	Tephrite	B-P	[8, 21, 36]
180	25°46′49′′ S/56°53′28′′ W	345/89	2.20	Phonolite	B-P	This paper
181	25°46′44′′ S/56°53′47′′ W	325/89	0.50	Tephrite	B-P	This paper
182	25°46′44′′ S/56°53′47′′ W	110/89	1.20	Trachyandesite	AB-T	This paper	182 is cut by 181
183	25°45′41′′ S/56°48′21′′ W	145/89	2.40	Peralk. Phon.	B-P	This paper
184	25°48′56′′ S/56°47′25′′ W	075/89	0.80	Phonolite	B-P	This paper
185	25°48′29′′ S/56°48′54′′ W	340/89	2.70	Tephriphonolite	B-P	This paper
186	25°48′53′′ S/56°47′05′′ W	135/89	0.25	Trachyandesite	AB-T	[8, 21, 36]
187	25°48′55′′ S/56°47′10′′ W	150/89	0.40	Tephrite	B-P	[8, 21, 36]
188	25°48′58′′ S/56°47′15′′ W	070/89	0.40	Phonolite	B-P	This paper
189	25°49′10′′ S/56°48′50′′ W	130/89	0.30	Tephriphonolite	B-P	[8, 21, 36]
190	25°48′29′′ S/56°48′54′′ W	115/89	1.80	Trachyte	AB-T	This paper
191	25°48′32′′ S/56°52′52′′ W	120/89	0.35	Tephrite	B-P	This paper
192	25°48′49′′ S/56°52′50′′ W	130/89	0.40	Phonolite	B-T	This paper
193	25°48′59′′ S/56°52′55′′ W	280/89	1.30	Trachyphonolite	AB-T	This paper
194	25°49′02′′ S/56°52′50′′ W	150/89	0.35	Phonolite	B-P	This paper
195	25°49′15′′ S/56°51′20′′ W	320/89	0.20	Phonotephrite	B-P	[8, 21, 36]
196	25°49′18′′ S/56°51′15′′ W	140/89	0.80	Phonolite	B-P	This paper
197	25°49′14′′ S/56°53′09′′ W	330/89	3.00	Tephrite	B-P	This paper
198	25°49′10′′ S/56°53′22′′ W	320/89	0.20	Phonolite	B-P	[8, 21, 36]
199	25°48′40′′ S/56°48′32′′ W	315/89	0.40	Trachyandesite	AB-T	[8, 21, 36]
200	25°49′37′′ S/56°53′24′′ W	160/89	0.25	Peralk. Phon.	B-P	This paper
201	25°49′38′′ S/56°53′04′′ W	310/89	1.80	Trachyphonolite	AB-T	This paper
202	25°48′09′′ S/56°59′10′′ W	165/89	1.50	Peralk. Phon.	AB-T	This paper
203	25°50′40′′ S/56°52′47′′ W	075/89	0.60	Phonolite	B-P	This paper
204	25°48′46′′ S/56°52′31′′ W	145/89	1.00	Tephriphonolite	B-P	This paper
205	25°47′46′′ S/56°52′43′′ W	230/89	2.10	Phonotephrite	B-P	This paper
206	25°47′45′′ S/56°52′40′′ W	070/89	0.80	Tephrite	B-P	This paper